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Mobility Lab User's Guide

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1. Galvanic_lsolator ISO_GND Short ISO_VDD to ISO_VOLT SELECT to select 5v output 68 18 Firmware Updates 18 Firmware Updates Firmware controls the various hardware components of your APDM product line monitors access points and docking stations It is important to keep the firmware up to date to ensure that your system gets the latest bug fixes and has access to the latest features Firmware updates are bundled with updates to Mobility Lab Firmware can be updated either automatically or manually 18 1 Automatic Firmware Updates Whenever you configure your system your hardware is first checked to ensure that the latest firmware is installed If not you will be prompted to automatically update your hardware to the latest versions of the firmware bundled with your system 18 2 Manual Firmware Updates Firmware can be updated manually as well This functionality can be used to either flash the default firmware to one of the hardware components or to flash a different version To access the Update Firmware dialog click on Tools gt Update Firmware in the menu bar Update Firmware O Update the firmware on your access points docking stations and monitors Access Point Docking Station Monitor Flash Default Firmware Flash Default Firmware Flash Default Firmware Flash Alternate Firmware Flash Alternate Firmware Flash Alternate Firmware _ Force update even if versi
2. First Step Length Degrees Range of motion of the shank calculated from the integrated sagittal angular velocity 14 6 3 Gait Gyroscopes attached on the shanks are used to detect the basic gait events i e time feet hit the ground and leave the ground initial and terminal contacts Temporal gait measures are then calculated based on the time of gait events In the next step ranges of motions RoM of the shank segments are estimated by integrating the gyroscopes signals Finally spatial gait measures are estimated using a biomechanical model 6 Gait measures are reported for individual gait cycles in the CSV export A gait cycle is defined as the period between two consecutive initial contacts heel strike of the right foot Spatial gait measures Measures Sensors Description Stride Length of Subjects body Shanks Distance between two consecutive foot falls at the moments of ini height tial contacts Averaged for left and right side The value is normal ized for height Stride Length R of Subjects Shanks Distance between two consecutive right foot falls at the moments height of initial contacts Stride Length L of Subjects Shanks Distance between two consecutive left foot falls at the moments of height initial contacts Stride Velocity of Subjects Shanks Walking speed Average of the right and left sides height second Stride Velocity R of Subjects Shanks Walking speed of right le
3. Double Support of GCT Shanks Percentage of a gait cycle that both feet are on the ground Swing of GCT Shanks Average percentage of a gait cycle that either foot is off the ground Swing R of GCT Shanks Percentage of a gait cycle that right foot is off the ground Swing L of GCT Shanks Percentage of a gait cycle that left foot is off the ground Stance of GCT Shanks Average percentage of a gait cycle that either foot is on the ground Stance R of GCT Shanks Percentage of a gait cycle that right foot is on the ground Stance L of GCT Shanks Percentage of a gait cycle that left foot is on the ground Initial Contact R Time seconds Shanks The time relative to the beginning of the trial that right foot hits the ground Sometimes referred to as heel strike Terminal Contact L Time seconds Shanks The time relative to the beginning of the trial that right foot leaves the ground Sometimes referred to as toe off Initial Contact L Time seconds Shanks The time relative to the beginning of the trial that left foot hits the ground Terminal Contact L Time seconds Shanks The time relative to the beginning of the trial that left foot leaves the ground 38 12 The Instrumented Timed Up and Go ITUG Test Measures Shank RoM Ranges of motions RoM and angular velocities Degrees Sensors Shanks Description RoM of shanks averaged of the left and right sides
4. Synchronized logging or Unsynchronized logging DataMode Indicates whether the data was retrieved wirelessly or copied from the monitor s internal storage while docked One of Streamed wirelessly or Logged to monitor AccelerometersEnabled 1 for enabled 0 for disabled GyroscopesEnabled 1 for enabled 0 for disabled MagnetometersEnabled 1 for enabled 0 for disabled DecimationBypass Internal use deprecated CalibrationVersion Version of the calibration data used to convert from raw samples to calibrated Sl units VersionString1 Firmware version string 1 VersionString2 Firmware version string 2 VersionString3 Firmware version string 3 CalibratedDataPopulated 1 for populated 0 for unpopulated LocalTimeOffset Time in milliseconds to add to UTC to convert to local time SyncValue Dataset containing the internal sync value for each sample Units Attribute string containing the timestamp units 1 2560th of a second since 0 00 Jan 1 1970 UTC Time Dataset containing a timestamp for each sample lt Units Attribute string containing the units microseconds since 0 00 Jan 1 1970 UTC Calibrated Group containing calibrated data lt Accelerometers Dataset containing accelerometer data Nx3 Units Attribute string containing the accelerometer units m s Range Attribute containing the range setting for the accelerometer 2g or 6g Gyroscopes Dataset containing gyroscope data Nx3 Units Attribute string containing t
5. A ONE i 1 sa Setup D Studies 4 Subjects O Sessions H Trials Name Description Creation Date Mobility Lab Study Investigate human motion Mon Dec 10 21 20 36 PST 2012 NIH Study Mon Dec 10 23 30 10 PST 2012 Study Actions mu Add Delete Edit Validate Export ED gt e Studies are the highest level data structure in Mobility Lab and provide a mechanism for grouping together collections of subjects Click on the Add Study button to add a new study Any number of studies can be created Studies must each have a unique name The study name and description can be edited by selecting the desired study in the Studies table and clicking on the Edit Study button on the bottom of the screen e To view the subjects associated with a specific study drill down you can either Select single click the study in the table then click on the Subjects tab Double click on the study in the table 18 5 Managing Meta data 5 2 Subjects n at Setup p Studies 4 Subjects O Sessions Subjects for study Mobility Lab Study Public 1D S01 S02 E Trials Subject Actions oe dd my Del a d mA o ES rl lid A Delete Edit ompact Full Repo Validate Export gt ay A Ww Subjects correspond to unique human participants in the study Click on the Add Subject button to add a new subject Any number of subject can be created Only the Public ID is requ
6. Degrees Shanks Trunk RoM of trunk in sagittal plane Trunk Horizontal RoM Degrees Shanks Trunk RoM of trunk in horizontal plane Trunk Sagittal Peak Velocity Degrees second Shanks Trunk Peak angular velocity of trunk in sagittal plane Trunk Horizontal Peak Velocity Degrees second Shanks Trunk Peak angular velocity of trunk in horizontal plane 39 12 The Instrumented Timed Up and Go ITUG Test 12 6 4 Turn Turning is detected and assessed based using gyroscopes within the trunk or lumbar sensor A mathematical model is used to detect the exact moment of beginning and end of turning 4 Measures Sensors Description Turning Duration Time seconds Trunk Duration of 180 turn Measured according to the mathematical model of turning Number of Steps Number Shanks Number of steps during 180 turn Steps which are at least 50 Trunk within turning period are counted Peak Turning Degrees second Trunk Peak 95 angular velocity of turnk during turning Velocity Step time Time seconds Shanks Average step duration during turning Trunk Step time before Time seconds Shanks The last step duration right before the turn turn Trunk 12 6 5 Turn To Sit Turn to Sit movement is a combination of turning and stand to sit transition Related measures are extracted by combining models of the two previous activities Measures
7. Output Trigger Shape Edge Level Low Trigger Start ra V OV SCC Ree eee eee e The blue region represents a recording that you intiate in Motion Studio e The black line is the output from the access point s synchronization port which can be used to trigger recording on an external system e In this figure the output pulse is generated only at the beginning of the recording Cancel OK The External Synchronization Configuration Dialog 60 17 External Synchronization and I O 17 1 Configuration Specification of external synchronization options is performed through the External Synchronization Con figuration dialog If multiple access points are being used synchronization options are specified for each access point individually so that you can determine which ones are receiving external signals and or sending external signals Each access point can have its input and output triggers specified individually Input and output triggers can also be disabled through the configuration dialog 17 2 Input Synchronization Level High Level Low Edge High Edge Low Input synchronization trigger types 17 2 1 Input Trigger Shape The input trigger shape indicates the type of signal that will be input into the specified access point and how you want Mobility Lab to respond when using the Stream dialog In the figure above the four basic trigger shapes are shown The solid black line repr
8. PDM movement monitoring solutions Mobility Lab User s Guide 2013 APDM Inc January 9 2013 Contents 1 Welcome 2 System Overview 2 1 2 2 2 3 2 4 NIG Lab Sotware ias RKB ERR EEA EAE EASE SS RAS ORE OS Movement Monitors acuosas Baw RS ERAS CEES AA RS A Docking SIM N a kid Book bee eee Oe ow as ES Ka ARCOS PONT cere bicis bal ty he e bee Oe ee ee le ees a Ma Installing Mobility Lab 3 1 3 2 Windows XP USB Peripheral Behavior 22 222 e865 ice e ede ieee dba Pan Stan grd Pany SOMA vader Bw EER OES ERE RS ORE RS Setup 4 1 4 2 4 3 4 4 4 5 4 6 Hardware SOMO ce 24 c 6d Soe e edad edeaweS eles e ci Ae da ah Tab a eo ein SIANG Mobimy Lab s s s on ar AA AAA A ee System GONNGITANGA x ik eyed Dox ea SH RPS eee Eo SS AR SERRE Soe SES NAO a se Sha eed SoS ee be bee eed 2 a ld POWerng OT q Hae aS ee Ee A CE Ee eS Ee OO A Re applying your saved configuration e Managing Meta data 5 1 5 2 5 3 5 4 SIS one a Shae ARE E A A a Oe Oe eH E eed 1 AAA IE o AI A WAS 2 0 E a aie A ee AR ee ees 6 gan AA AN Instrumenting the Subject Testing 7 1 7 2 in 7 4 78 Curent Selection sos Rbk sansa sE a Gah EOE he EPS ew e i Sele inga a a aa NA ee eS Eod Slane MAS sas ae eee ee el eo ae et oe hale Ste ga Subject MSTUCIONS Dialog sc cs we mens bo eee bore DE OH SER He PRS eee oA FAA Back BOND 00500 Uri Seek a bs ee ee ee PAL BUSCAMOS BURNOM 5 su ae Bae AR Se AR a
9. RoM Shank R Degrees Shanks RoM of right shank RoM Shank L Degrees Shanks RoM of left shank Peak Shank Velocity Degrees seconds Shanks Peak 95 angular velocity of shanks Average of the left and right sides Peak Shank Velocity R Degrees seconds Shanks Peak 95 angular velocity of right shank Peak Shank Velocity L Degrees seconds Shanks Peak 95 angular velocity of left shank Peak Arm Velocity Degrees second Shanks Arms Peak 95 angular velocity of arms Average of the left and right sides Peak Arm Velocity R Degrees second Shanks Arms Peak 95 angular velocity of right arm Measured as the norm of 3D angular velocity vector Peak Arm Velocity L Degrees second Shanks Arms Peak 95 angular velocity of left arm Measured as the norm of 3D angular velocity vector Arm Swing Velocity Asymmetry Shanks Arms Asymmetry of left right arm swing angular velocity Defined as the difference between the two sides as percentage of the fastest side Arm RoM Degrees Shanks Arms RoM of arms during arm swing Average of the left and right sides RoM Arm R Degrees Shanks Arms RoM of right Arm Measures as the norm of 3D arm rotation vector RoM Arm L Degrees Shanks Arms RoM of right Arm Measures as the norm of 3D arm rotation vector Trunk Sagittal RoM
10. angular velocity of left shank Velocity L Peak Arm Velocity Degrees second Shanks Peak 95 angular velocity of arms Average of the left and right Arms sides Peak Arm Velocity Degrees second Shanks Peak 95 angular velocity of right arm Measured as the norm R Arms of 3D angular velocity vector Peak Arm Velocity L Degrees second Shanks Peak 95 angular velocity of left arm Measured as the norm of Arms 3D angular velocity vector Arm Swing Shanks Asymmetry of left right arm swing angular velocity Defined as the Velocity Arms difference between the two sides as percentage of the fastest side Asymmetry Arm RoM Degrees Shanks RoM of arms during arm swing Average of the left and right sides Arms RoM Arm R Degrees Shanks RoM ofright Arm Measures as the norm of 3D arm rotation vector Arms RoM Arm L Degrees Shanks RoM ofright Arm Measures as the norm of 3D arm rotation vector Arms Trunk Sagittal RoM Degrees Shanks RoM of trunk in sagittal plane Trunk Trunk Horizontal Degrees Shanks RoM of trunk in horizontal plane RoM Trunk Trunk Sagittal Degrees second Shanks Peak angular velocity of trunk in sagittal plane Peak Velocity Trunk Trunk Horizontal Degrees second Shanks Peak angular velocity of trunk in horizontal plane Peak Velocity Trunk 56 15 The Instrumented Long Walk IWalk Test Measures Stride Velocity Asymmetry Symmetry Measure
11. Run mode battery level 2 0_0_ Run mode battery level 1 low e Run mode battery very low 0_0_0_ Run mode clock unset battery level 4 full KEREN Run mode clock unset battery level 3 0_0_0_0_ Run mode clock unset battery level 2 0_0_0_ Run mode clock unset battery level 1 low eo Run mode clock unset battery very low 0_0_0 0_ Run mode no sync lock battery level 4 full EEEE Run mode no sync lock battery level 3 _0_0_0_ Run mode no sync lock battery level 2 0_0_0_ Run mode no sync lock battery level 1 low 0_0_ Run mode no sync lock battery very low 0_0_0_0_ Run mode clock unset no sync lock battery level 4 full E Run mode clock unset no sync lock battery level 3 606000 Run mode clock unset no sync lock battery level 2 0_0_0_0_ Run mode clock unset no sync lock battery level 1 low 0_0_0_ Run mode clock unset no sync lock battery very low 606 000 85 21 Monitor Reference State LED Pattern Error Modes Error mode default x Error mode configuration x E E Error mode system 4 666 Error mode data buffer 466660 Error mode SD buffer 0_ 0 0 0 0 0 Error mode SD I O Card is full Wireless Streaming Debug LED Modes Normal CPU limited ee Sync bad ee CPU limited Sync bad ee Missed sync gt 0 eo Missed sync gt 0 CPU limited ee Missed sync gt 0 Sync bad eo Missed sync gt 0 CPU lim
12. Shanks Distance between two consecutive right foot falls at the moments of initial contacts Stride Length L of Subjects height Shanks Distance between two consecutive left foot falls at the moments of initial contacts Stride Velocity of Subjects height second Shanks Walking speed Average of the right and left sides Stride Velocity R of Subjects height second Shanks Walking speed of right leg Stride Velocity L of Subjects height second Shanks Walking speed of left leg Values are given relative to the subject s body height to enable comparison to normative data If the subject s height is entered through Mobility Lab then values will additionally be provided in units of meters Measures Cadence Steps minute Temporal gait measures Sensors Shanks Description Stepping rate Gait Cycle Time Time seconds Shanks Duration of a complete gait cycle Double Support of GCT Shanks Percentage of a gait cycle that both feet are on the ground Swing of GCT Shanks Average percentage of a gait cycle that either foot is off the ground Swing R of GCT Shanks Percentage of a gait cycle that right foot is off the ground Swing L of GCT Shanks Percentage of a gait cycle that left foot is off the ground Stance of GCT Shanks Average percentage of a gait cycle that either fo
13. Turn to sit ITUG M Arms Left 1 2 Right Arm ITUG ISAW IWalk Y Lumbar 3 Turning ITUG ISAW IWalk Sway ISway ISAW Y Legs Left 4 Right Gait ITUG ISAW Walk _ Feet Left Right GaitTrack IWalk Experimental Wireless Channel 90 Re apply Last Configuration New Configuration M Enable Remote The Setup Tab WiFi routers cordless phones and blue tooth devices Because of this it s important to choose a channel that is not heavily in use by another device or you may experience wireless issues The default channel for Mobility Lab is 90 because it is typically out of the range of most WiFi routers If you experience wireless issues the most common source of interference is from WiFi routers You can determine the channel that your WiFi router is running on and determine its corresponding frequency from the following URL http en wikipedia org wiki IEEE_802 11 e Enable Remote Mobility Lab supports an external remote for navigating a recording session See Section 8 for details 2 Once you are done choosing your configuration options click the New Configuration button in the Configuration panel on the left side of the screen This will create a new configuration and save it for future use The status panel on the left of the screen should indicate Ready 3 If you get an error indicating that the wrong monitors are docked make sure the monitor IDs that are entered in the left column match those that are etche
14. 20 3 File Structure 20 3 1 Version 3 e MonitorLabelList Attribute containing an array of monitor labels in the same order as the CaseldList e CaseldList Attribute containing an array of monitor case IDs in the same order as the MonitorLabelList e FileFormatVersion Attribute containing the file format version 3 e Annotations Table containing annotations Time Annotation time in epoch microseconds Case ID A movement monitor case ID associated with the annotation Annotation The annotation string e AA XXXXXX A group is included in the file for each monitor in the CaseldList with the name equal to the case ID SampleRate Attribute containing the output data rate for the monitor DecimationFactor Decimation factor for the monitor s internal processing ModulelD The module ID for the monitor TimeGood Flag indicating whether the time has been set on the monitor since it powered on RecordingMode One of Wireless streaming Synchronized logging or Unsynchronized logging DataMode Indicates whether the data was retrieved wirelessly or copied from the monitor s internal storage while docked One of Streamed wirelessly or Logged to monitor AccelerometersEnabled 1 for enabled 0 for disabled 75 20 Working with HDF5 Files GyroscopesEnabled 1 for enabled 0 for disabled MagnetometersEnabled 1 for enabled O for disabled DecimationBypass Internal use deprecated Calibr
15. 20 6 NOS ooh 2 Sted ori Siow 2 HES YER SEES SLESES SEGA DTAS OL RELOEA 81 21 Monitor Reference 82 ARE 4 03 4 2 amp Ae Oe E 82 2 PONEIS DONN sec ee sae ois g ee eh Aa eB A T TEN 82 2 Data Storage caes Sa E Sw BS at AR Se BE a a Se A a 82 4 hc ble oe eR ew REY ee eR Oe Owe EES Re ee eH Bae eed 82 le IA 2NG ic kasi eo es Se ee A we ee See iga te Ae ee me es he 21 7 Firmware Updates ra bs raspai dea Bo OES SERS OS DER OP RS eK DG 21 8 Techmical SPCCIICONONS s 6c a RABIA Ee A ee ee 21 9 LED Reference_ ic Rade Sa Behe RSE RORY FEES EOE Be ee Bs 21 9 1 Status Codes and LED Colors Patterns excesos rise eh ee wo SE 21 9 2 Movement Monitor LED Reference 0 0 eee ee ee ee ee 21 10lechnical Drawing c a e a E DI Sake in NGA ed eee oe ew eS 22 Access Point Reference OIE ese Bas eh ee Se ee A ad Be ER A BG 22 2 Firmware Updal s gt lt a Se ew PRESSES Pewee EY ee DE eee bee Ses 223 Munting and Placement e 2422442 nb 22844444662 a 224 Using Multiple Access PONS lt lt es cee Re Ree ee AR ees 224 1 Redundancy os ee ee PERUSE Ee Pew E Se Sie ee Bus 22 4 2 Streaming from more than 6 Opals 6 os 6s ee Meee sis See RSS 2A SLED RETENC eur Ek HE A E ee ew sk ER a E 22 6 Mechanical and Electrical Specifications o o ee eee 221 TEC MICALDTSIWIN s s ni e as e A a a as e LR 23 Docking Station Reference So DAVES e ira RA e A E er A Rd he A NA 233 Mechanical and Electrical Specifications A A
16. SI aa e eRe eee A wR EEO Oe RE he ee i 13 3 Before recording the trial o cisco wb ERA RES we RE ee ROR 194 Recording Tie Ital rs ia ro eee p EO SS eee a Aw ED ES ERS RS 13 5 ISway Measure Definitions lt lt ca cos we ew Awe OR Ee BAS KO Ee RS Hee De 1351 SWI o ee OE AAA IS eS ee Bee ee es 14 The Instrumented Stand and Walk ISAW Test 14 1 Test ENMENDAR CARER ROR E RE e AE 14 2 SUDETA escri ED ES HERES De OOH EEE SEEKERS RH EER ES 14 3 Instrucing ihe SUBjESI nt wc he ee eh ede eee GELS SE Se he PARR Bae ald 30 30 30 30 31 32 33 34 34 34 35 35 35 37 37 37 37 40 40 41 41 41 41 42 43 43 14 4 Be f re Rec rding the Wal cs Se hae we tega ta ARA A 14 3 Rec rding the Wah sa ak a Se PRS SESE RORY SEES eee EE ee we Ss 14 6 ISAW Measure Definitions 6 6 18 6a ee Bd wee ewe E Hee DER EES ee ES TEE T OWI es ri ERA A eo A aa eH es Ba ee ag nina Ni 14 6 2 Step Initiation TAPA ooo Seok ee Gee Pee eee woe EY eR SR eS TAG GA es 2 ee eh a eee ee eee Be ES So ee DS OS BAR OHRE wes CGS WEN MU oce seas Eo ee Re ee ee ee A 15 The Instrumented Long Walk IWalk Test 15 1 Test Environment Sep 2 ecoa maaa ea d eR SEEREE a BEA 15 2 SUDETA vors imi oe era tae e E eS ee E gni 15 3 Instructing the Subject vk is Pee aa 154 Before Staring ihe Tial s oea maaa rica A SE 15 5 Recording the Wiel s sisone eee RES ee Ng E eS RR ER A 15 6 IWalk Measure Definitions o ee
17. Sensors Description TurSit Duration Time seconds Duration of turn to sit transition Measured according to the math ematical model of turn to sit transition Peak TurSit Velocity Degrees second Peak 95 angular velocity of trunk during turn to sit transition TurSit RoM Degrees RoM trunk in the sagittal plane during turn to sit transition 40 13 The Instrumented Sway ISway Test 13 The Instrumented Sway ISway Test 13 1 Test Environment Setup Locate a clear area that is 1 4 meters from a wall Place a picture at head height on the wall The subject will be instructed to look at this picture in order to maintain their balance and focus Place the foot block included with the Mobility Lab kit on the floor where the subject will stand Ensure that the computer screen is out of the subject s line of sight during testing Before clicking on the Start Trial button make sure that e The LED on the access point is blinking green indicating a good wireless signal If the access point is blinking red or green red you may not have a good wireless signal or one of the monitors may be obstructed For example it is possible that the subject s crossed arms are covering a wrist or trunk monitor If this is true reposition the arms and or access point to get a better signal 13 2 Instructing the subject After clicking on the Start Trial button in Mobility Lab you will be presented with the sub
18. a peak charge to the battery ensuring it has the longest run time and improves battery life Warning Your movement monitor uses a lithium battery This battery may only be charged over a limited temperature range Never attempt to dock or charge your Opal when the temperature experienced can be outside the range of 0 to 45 degrees Celsius 32 to 113 degrees Fahrenheit The recommended charging and docking temperature range is between 5 to 35 degrees Celsius 40 to 95 degrees Fahrenheit 21 2 Powering Down If you wish to power down your monitors for storage or travel dock the monitors you wish to power down and click on the Power Off button in Mobility Lab After this process is complete these monitors will power down when they are undocked They can be powered back on by re applying the saved configuration or re configuring the system 21 3 Data Storage The movement monitors utilize a flash card to store data while logging This data can be downloaded by using a docking station to dock the movement monitor When the movement monitor is docked it finishes up writing to the internal flash card and then releases it to the docking station At this time the docking station indicates to the PC that there is a new read only removable drive to be mounted Using your file browser you can navigate to the removable drive and copy the files off of it The files are in a proprietary raw format and need to be converted to either a HDF5 or CSV format th
19. captured in Mobility Lab the last sample recorded will correspond exactly to the time of the stop trigger event If these do not align exactly the sample following the start trigger event will be the last sample recorded This way we guarantee that the recording captured in Mobility Lab fully spans the time period between the external input start and stop events but no more 17 2 5 Annotation of Externally Triggered Recordings Note Annotations are implemented for the HDF file format only When an external Start trigger event is detected an annotation is added to the recording that indicates the name of the event in this case External trigger start time along with the timestamp of the event in epoch microseconds Similarly when an external Stop trigger event is detected a timestamped annotation is added to the recording in this case labeled as the External trigger stop time These annotations allow you to align the recording captured in Mobility Lab with your external events in the case where the external trigger event times do not exactly align with the samples captured in your HDF file 17 3 Output Synchronization 17 3 1 Output Trigger Shape The output trigger shape indicates the type of signal that will be generated by the specified access point when recording is started and stopped through the streaming dialog in Mobility Lab The output trigger shapes are identical to the input trigger shapes but in this case
20. correct it If it is believed that the subject can complete the trial successfully then the trial should be re done e The subject instructions visible in the dialog box should be read aloud to the subject on each subsequent TUG trial within reason to ensure that the proper behavior is enforced for each trial 42 13 The Instrumented Sway ISway Test 13 5 ISway Measure Definitions ISway analysis algorithm automatically processes input signals and provide objective measures related to sway in both the time and the frequency domains The primary outcomes are highlighted by bold text These measures might be of primary interest for clinical applications Researchers might be instructed in both primary and secondary outcomes and note that there are planar 2D measures as well as only medio lateral or antero posterior measures 13 5 1 Sway All sway measures are assessed using the 3 axial accelerometer from the lumbar sensor All details are in Mancini M et al 2 Measures Unit Description Jerk m s Smoothness of sway from time derivative of acceleration NJerk AD Normalized Jerk normalized to range of acceleration excursion and duration Time Domain Measures Sway area computed as the area included in the ACC per unit of time Amount of sway from root mean square of ACC time series Mean velocity Mean distance from center of ACC trajectory Sway path of total length of ACC trajectory Range
21. hardware and record your movement data It also provides a simple interface for entering and editing meta data viewing your recordings generating reports and more e The Current Selection component of the interface provides information about the study subject ses sion and test that is currently selected e The Hardware Configuration Status indicates whether the hardware has been successfully configured for recording e The System Actions component of the interface provides easy access to system wide actions such as configuration and data upload e The Data Entry and Navigation component uses a tab based table to navigate edit and collect data 2 System Overview 2 2 Movement Monitors Movement monitors combine a number of sensors within a single package including a 3 axis accelerometer a 3 axis gyro a 3 axis magnetometer and a temperature sensor The accelerometers can be configured in a high 6G mode or a low 2G mode depending on the testing requirements There are a number of options for securing the monitors on subjects using a selection of straps 2 3 Docking Station The docking station is used to charge and configure the movement monitors Depending on your configura tion you may have up to 6 docking stations chained together into a single unit 2 System Overview 24 Access Point The wireless access control point access point for short allows for wireless communication between the host computer and
22. process 21 7 Firmware Updates Updating the movement monitor firmware should be done using the Mobility Lab software This process is detailed in Section 18 of this document 21 8 Technical Specifications e The accelerometer range is 58 8 m s 6 g optionally 19 6 m s 2 g e Accelerometers have a typical noise density of 1 3 mm s V Hz e The X and Y axis gyros have a range of 34 9 rad s 2000 dps e The Z axis gyro has a range of 26 8 rad s 1500 dps e The X and Y axis gyros have a typical noise density of 0 81 mrad s VHz e The Z axis gyro have a typical noise density of 2 2 mrad s Y Hz e Magnetometers have a range of 6 Gauss e The magnetometers have a typical noise density is 160 nT Y Hz e Positive X is pointing from the monitor toward the connector Looking top down at the monitor with positive X pointing away from you positive Y is pointing left Z is pointing up out of the top of the case Angular velocity sign is defined according to a right hand rule A counterclockwise rotation about the Z axis looking from the Z direction is positive 83 21 Monitor Reference 21 9 LED Reference 21 9 1 Status Codes and LED Colors Patterns The LEDs on the access points and movement monitors provide important information about the operating state of the hardware including error statuses The tables below list the LED patterns associated with these states and can be useful in troubleshooting issues encountered with th
23. the solid black line in the figure above represents the signal being output by the configured access point The blue shaded region represents the 62 17 External Synchronization and I O Level High Level Low Edge High Edge Low Output synchronization trigger types period being recorded in Mobility Lab initiated either through user selection of the start stop buttons in the Stream dialog use of the wireless remote or an external synchronization event Unlike input triggers output triggers are processed even if the External Sync option is not specified in the Record Duration panel of the Stream dialog 17 3 2 Output Trigger Level Output triggers can be either low or high depending on the requirements of the external system receiving the synchronization signal 17 3 3 Output Trigger There are three output trigger options available e Start The external signal will only be generated when recording is started in Mobility Lab End The external signal will only be generated when recording is stopped in Mobility Lab Both The external signal will be generated when recording is started and stopped in Mobility Lab e Note It is not recommended to use the level trigger shapes in conjunction with the start or end triggers This is because the output signal will be in an undeterministic state prior to the trigger event 17 4 Isolated External Interface Details APDM s access points come fitted with a
24. voltage rail from the isolated supply located inside the AP e GND Ground rail from the isolated supply located inside the AP e VSEL Tie to Ground or leave floating to select output and V operation at 3 3V tie to V to select 5V operation e AP AP Allows multiple AP configurations tie only to the same port of another AP e AP Out Digital output from the AP Default is OV to 3 3V but can be configured for 0 5V operation e AP In Digital input to the AP from an external source or the manual trigger toggle switch Note The AP is able to safely source only 50mA on the V rail 67 17 External Synchronization and I O 17 4 4 4 Pin Analog Input Output Connector Note This connector is currently reserved for future expansion e 4 Pin Mating Connector Digikey part number CP 2040 ND CUI Inc part number MD 40 e 4 Pin Mating Pig Tail Cable Digikey part number 839 1049 ND AP 4 Pin Analog Connector e Pin 1 Analog In 0 to 6 volts e Pin 2 Analog Out 0 to 5 volts or 0 to 3 3 volts depending on software controled configuration e Pin 3 No Connect reserved for future use avoid connecting this pin e Pin 4 Ground gnd This is the same ground as USB and depending on how your USB hub and or laptop are designed electrically may also be the same ground as the hub and laptop Consideration should be taken for ground loops 17 4 5 Schematic Isolated Section Equivalent Circuit 100k D O gt ISO_VDD
25. 009 no 9 1028 1034 2 Martina Mancini Arash Salarian Patricia Carlson Kuhta Cris Zampieri Laurie King Lorenzo Chiari and Fay B Horak Isway a sensitive valid and reliable measure of postural control J Neuroeng Rehabil 9 2012 no 1 59 eng 3 Meir Plotnik Nir Giladi and Jeffrey M Hausdorff A new measure for quantifying the bilateral coordination of human gait effects of aging and parkinson s disease Exp Brain Res 181 2007 no 4 561 570 eng 4 Arash Salarian Fay B Horak Cris Zampieri Patricia Carlson Kuhta John G Nutt and Kamiar Aminian itug a sensitive and reliable measure of mobility IEEE Trans Neural Syst Rehabil Eng 18 2010 no 3 303 310 5 Arash Salarian Heike Russmann Franois J G Vingerhoets Pierre R Burkhard and Kamiar Aminian Ambulatory monitoring of physical activities in patients with parkinson s disease IEEE Trans Biomed Eng 54 2007 no 12 2296 2299 6 Arash Salarian Heike Russmann Franois J G Vingerhoets Catherine Dehollain Yves Blanc Pierre R Burkhard and Kamiar Aminian Gait assessment in parkinson s disease toward an ambulatory system for long term monitoring IEEE Trans Biomed Eng 51 2004 no 8 1434 1443 7 A Sant Anna A Salarian and N Wickstrom A new measure of movement symmetry in early parkinson s disease patients using symbolic processing of inertial sensor data IEEE Transactions on Biomedical Engineering 58 2011 no 7 2127 2135 9
26. 5
27. 6 Gait measures are reported for individual gait cycles in the CSV export A gait cycle is defined as 37 12 The Instrumented Timed Up and Go ITUG Test the period between two consecutive initial contacts heel strike of the right foot Spatial gait measures Measures Sensors Description Stride Length of Subjects body Distance between two consecutive foot falls at the moments of ini height tial contacts Averaged for left and right side The value is normal ized for height Stride Length R of Subjects Shanks Distance between two consecutive right foot falls at the moments height of initial contacts Stride Length L of Subjects Shanks Distance between two consecutive left foot falls at the moments of height initial contacts Stride Velocity of Subjects Shanks Walking speed Average of the right and left sides height second Stride Velocity R of Subjects Shanks Walking speed of right leg height second Stride Velocity L of Subjects Shanks Walking speed of left leg height second Values are given relative to the subject s body height to enable comparison to normative data If the subject s height is entered through Mobility Lab then values will additionally be provided in units of meters Temporal gait measures Measures Sensors Description Cadence Steps minute Shanks Stepping rate Gait Cycle Time Time seconds Shanks Duration of a complete gait cycle
28. 6 pin digital I O connector and a 4 pin analog I O connector To connect an access point to your external equipment you may have to create a custom cable that can interface with both components Below we provide the technical specifications necessary to complete this task Feel free to contact our technical support at support apdm com if you require assistance or have additional questions 63 17 External Synchronization and I O The Isolated External Interface for the AP consists of an auxiliary power supply two GPIO lines one in one out and an inter AP sync signal All signals in the isolated external interface section including power and ground are isolated from the remainder of the board using an RF solution similar in operation to an opto isolator Further all signals in the isolated external interface are 5V tolerant and ESD protected beyond the 15kV human body model The connectors used in the isolated interface consist of one standard female RCA and one female 6 pin mini din connector The RCA connector mates to almost any basic RCA cable similar to those used in audio systems When choosing an RCA mating connector choose one that has uncovered bare shield spades to allow the connector to fit fully into the recessed hollow in the AP body The 6 pin mini din connector is similar to those used for older style PS 2 keyboards and mice Choose a connector that is small enough to fit fully inside the recessed hollow in the AP body Som
29. 8 2 1 Flash Default Firmware se sa a s es sagra ae hE ee Ee Re Ew ES 69 18 2 2 Flash Alternate Firmware e 4 28 eh 04 4 LORS ak dici eritem ed BLA 69 18 23 Ae A INEA 70 19 Calibration 71 191 Sens r Error Models 2244645484464 ai naban e046 a a 4454 OSES 4 5482 ae aA DEA 71 19 1 1 Acceleromelers_ NG 71 19 12 GYroStOpes ck oe ak EEE OEE e AA AAA 72 TAS Magnetometers conri aa 73 19 1 4 Temperature 309 0 0 EA ERA A E A A a 73 192 Factory Calibration escasos E A AA A 73 19 211 Updating Factory Calibration s s i srs 622448442468 daa iaa a 74 19 9 User CAMION ss we 4 6 be we E ee A O na es ee we oe a 74 19 3 1 Magnetometer Recalibration 2 a e es 74 19 9 2 Gyroscope Recalbralio s s smi sra bee Sh Ee SEP a das 74 1133 Accelerometer Recalibrati n 4 04504 ec 6a he Peewee be oe oe ee A RA 74 194 Clearing User Calibration oo era seset Oe ORR EA A A 74 20 Working with HDF5 Files 75 201 MIA 6 02005 es Se ame E BO os BOR Sw A ES Ee A iS 75 202 Data Organizator 6 ee a ee SERS OOK OR eR ERE EE ERD Boe OS eA Be 75 209 Fie SUCUS o san Dod Aa Ge SHRED EESESREES SESS SERA DEA OS 5 8 D0 75 20 91 VESON ioc a See Sse i Sw BS A A AAN E RAROS A a oe EE HR 75 Vane ven et ee eh ek eRe Se eee eee hE eas Oh eee 76 209 9 MUSA ds ce Oe ee Oke BOE ESE SEE LESSEE SEA OFA DEL OA BEA 78 20 4 Working with HDF 5 In MATLAB n4 4 ka ewe ke ee ee ee AA dr 79 SUS EXIMPIES ian eee ed ae ee e Oe EER aan a EE ED OR EE eRe SO 79
30. Arm Velocity L Degrees second Shanks Arms Peak 95 angular velocity of left arm Measured as the norm of 3D angular velocity vector Arm Swing Velocity Asymmetry Shanks Arms Asymmetry of left right arm swing angular velocity Defined as the difference between the two sides as percentage of the fastest side Arm RoM Degrees Shanks Arms RoM of arms during arm swing Average of the left and right sides RoM Arm R Degrees Shanks Arms RoM of right Arm Measures as the norm of 3D arm rotation vector RoM Arm L Degrees Shanks Arms RoM of right Arm Measures as the norm of 3D arm rotation vector Trunk Sagittal RoM Degrees Shanks Trunk RoM of trunk in sagittal plane Trunk Horizontal RoM Degrees Shanks Trunk RoM of trunk in horizontal plane Trunk Sagittal Peak Velocity Degrees second Shanks Trunk Peak angular velocity of trunk in sagittal plane Trunk Horizontal Peak Velocity Degrees second Shanks Trunk Peak angular velocity of trunk in horizontal plane 50 14 The Instrumented Stand and Walk ISAW Test 14 6 4 Turn Turning is detected and assessed based using gyroscopes within the trunk or lumbar sensor A mathematical model is used to detect the exact moment of beginning and end of turning 4 Measures Turning Duration Time seconds Sensors Trunk Description Durat
31. GG AN os a o A e bi a ee ee BSS 16e MUNE erotica o aE A we A ee AE a ee 16 When You Are Done 16 1 Docking MONTOS onzas aires e WO POWER E EEE 17 External Synchronization and I O 17 1 CGONIGUrJHON exc orita Ge SHEERS LEREEELS KSEE SEAL A 17 2 Input Synchronization gt awe oe 28 oe inga OE OR we ee ee a Ya e a 17 21 Input mgger Shape 2c vce Ree we eee eR A OS eA 17 22 INDO Teer Level cca mefa rro TELA Input OO se 5 ra RE ee RA Re ee ee A de 17 2 4 Sample Selection with External Input Trigger Events 0 17 2 5 Annotation of Externally Triggered Recordings 1 COMICS yO o AR AE Ng E A Ew e e 17 2 1 Output Trigger Shape 2 24 s ieo sr GOSH HR e DOE Ee REE 17 3 2 Diol Trigger Level o s 2 usd dRSEeHeE LEBER ESE DR ORAL EELS BLA Wee OU I o ee Stas we ey Oh me we ee me Ew aa Bi 17 4 Isolated External Interface Details ee 17141 ACA Inter AP Syne CONMSGI S a e rs c ema iera e rd ESAS EHR 17 4 2 6 Pin Digital Input Output Connector c a e a a a E OR ER e a 17 4 3 External Syne BOX gt a es e BPR SSE pek Oe wee Eee NGNE Eee bea E 17 4 4 4 Pin Analog Input Output Connector oaoa e 020000 ee ee eee 52 52 52 53 53 53 54 54 58 59 59 59 FAS SCEMA ocre Fee ee ee eee AR A ee ee ee NG 68 18 Firmware Updates 69 16 1 Automatic Firmware Updates 2 25224 544 28 446448 H8E 8 va FA a ELS 69 18 2 Manual Firmware 00ers cz Ob Re ew AE A RAR e e 69 1
32. If the subject does not have appropriate shoes please have them walk barefoot no socks and MAKE A NOTE in the comments section of either the session or each TUG trial BAD FOOTWEAR 4 GOOD FOOTWEAR Before clicking on the Start Trial button make sure that e The LED on the access point is blinking green indicating a good wireless signal If the access point is blinking red or green red you may not have a good wireless signal or one of the monitors may be obstructed For example it is possible that the chair being used is blocking the wireless signal from the lumbar monitor If this is true get a different chair that has an open lower back area and or reposition the access point to get a better signal 34 12 The Instrumented Timed Up and Go ITUG Test 12 3 Instructing the Subject After clicking on the Start Trial button in Mobility Lab you will be presented with the subject instruction dialog and the following written instructions e When say Walk stand up from the chair walk to the line turn around walk back and sit down After you sit back down sit quietly until you hear the tone or are told the test is complete Walk at a natural and comfortable pace looking straight ahead Try not to use your hands to assist yourself during standing or sitting Note If the subject is unable to go from sit stand in a safe manner they should use their hands but a NOTE in the comments section shou
33. Opal movement monitors A single access point can support up to 6 Opals 10 3 Installing Mobility Lab 3 Installing Mobility Lab Mobility Lab is supported on the following platforms e Windows 32 bit XP Vista Windows 7 e Windows 64 bit Vista Windows 7 Locate the thumb drive or CD ROM that was shipped with your system This drive contains the Mobility Lab software in addition to 3rd party software that is required for automated analysis and reporting The contents of the drive are shown below Open the folder the corresponds to your operating system 32 or 64 bit e MobilityLab_UserGuide paf this document e Win32 MobilityLab Setup Win32 exe vcredist_x86 exe MCRinstaller Win32 exe basic miktex 2 9 3927 exe e Win64 MobilityLab_Setup_Win64 exe vcredist_x64 exe MCRinstaller_Win64 exe basic miktex 2 9 3927 exe needed for analysis and report generation Double click on the Mobility Lab setup file This will guide you through most of the installation process Note In Windows 8 when you launch the installer you will see a dialog indicating Windows protected your PC along with a More info link and an OK button at the below This behavior is expected Click on the More info link and select Run anyway Note If you see a Windows User Account Control dialog asking Do you want to allow the following program from an unknown publisher to make chang
34. R eRe 23 4 LED Reference 252k heh ED A e a k SH a A e a a 239 5 Technical Drawing a 22 24 4682 224444588824 46442 ir rd 24 Troubleshooting 88 88 88 88 88 88 88 89 89 90 91 91 91 91 92 93 94 we He W 1 D man dp sas O semen E mas Subjects f d ili mais for study Mobility Lab Study so sos ear sos false 1956 sos r false 1 Welcome The Mobility Lab System is designed for the fast and easy capture of human motion within a clinical setting This guide will provide assistance on how to e Set up your hardware Use the Mobility Lab software to collect data Place the sensors on your subjects Upload data to the central data server Update your system Troubleshoot problems 2 System Overview 2 System Overview The Mobility Lab system allows the user to wirelessly record human movement from multiple synchronized monitors File Edit Tools View MobilityExchange Help pit ja Setup jo Studies 4 Subjects O Sessions Mobility Lab Study 4 E eg MAA Subjects for study Mobility Lab Study Current S01 Public ID Control Year of Birth true i Session Si Date Selection SunJan das PST 2011 sam Test Type false TUG Test Condition Default Data Entry and Hardware Navigation Configuration Status System Actions a afp sasaran mn aj a ca The Mobility Lab user interface 2 1 Mobility Lab Software The Mobility Lab Software is used to configure your
35. _space dset ndims dims H5S get_simple_extent_dims dspace nSamples dims 1 nSamplesRead min nSamples 60 fs read at most one minute of data accSegment hdf5readslab filename accPath 0 0 nSamplesRead 3 t 1 nSamplesRead fs figure plot t accSegment 80 20 Working with HDF5 Files 20 6 Notes e Arrays in MATLAB use the FORTRAN convention of storing them in memory by column then row instead of the C convention used by HDF 5 of row then column This has the effect of making the returned arrays transposed from how this document and many other interfaces to HDF5 claim they are laid out e Older versions of MATLAB before 2009a did not support the compression used in Mobility Lab s HDF 5 files If you are using one of these older versions the free h5repack utility available from the HDF Group can remove the compression This utility is available at http www hdfgroup org HDF5 release obtain5 html The command to repack the file s h5repack f NONE example h5 example_no_compression h5 81 21 Monitor Reference 21 Monitor Reference 21 1 Charging A movement monitor charges its internal battery any time it is connected to a docking station At the optimal charge rate the movement monitors internal battery will complete its bulk charge 80 90 within an hour for a fully discharged battery It is recommended that the movement monitor be charged for up to 3 hours to provide
36. al within reason to ensure that the proper behavior is enforced for each trial 15 6 IWalk Measure Definitions The Instrumented Walk IWalk analysis algorithms automatically processes recorded movement data and provide objective measures related to gait and turning The primary outcomes in each table are highlighted by bold text These measures might be of primary interest for clinical applications Researchers might be interested in both primary and secondary outcomes 15 6 1 Gait Gyroscopes attached on the shanks are used to detect the basic gait events i e time feet hit the ground and leave the ground initial and terminal contacts Temporal gait measures are then calculated based on the time of gait events In the next step ranges of motions RoM of the shank segments are estimated by integrating the gyroscopes signals Finally spatial gait measures are estimated using a biomechanical model 6 Gait measures are reported for individual gait cycles in the CSV export A gait cycle is defined as the period between two consecutive initial contacts heel strike of the right foot 54 15 The Instrumented Long Walk IWalk Test Measures Stride Length of Subjects body height Spatial gait measures Sensors Description Distance between two consecutive foot falls at the moments of ini tial contacts Averaged for left and right side The value is normal ized for height Stride Length R of Subjects height
37. at will provide data in calibrated SI units This conversion happens automatically if Mobility Labis used to import the data Alternately there are functions in the SDK to do this conversion programmatically 21 4 Cleaning Cleaning the movement monitors case should be done by wiping the bottom of the case where it contacts the skin with Rubbing alcohol or other cleaning wipe If the entire case needs to be cleaned use only an ethyl alcohol or isopropyl alcohol based wipe Methyl alcohol should be avoided for cleaning the top since it will 82 21 Monitor Reference cause degradation of the plastic over time The movement monitor should not be submerged in any liquids or subjected to any high temperatures for cleaning The straps on the monitor can be cleaned by wiping them down with Rubbing alcohol Alternatively the straps can be removed and washed separately using mild soap and water 21 5 Storage Storage of the movement monitor should be in a dry static fee location An anti static bag or in the supplied case is recommended The movement monitor should also not be subjected to any large G forces to prevent damage or changes to the calibration of the sensors in the monitor It is recommended for the health of the battery to to have at least a bulk charge during storage 21 6 Drivers Drivers are provided as part of the library distribution and Mobility Lab The drivers are installed automatically as part of the Mobility Lab installation
38. ation will blink yellow until external or power is plugged in ifonly charging is required the external AC power must be used 23 3 Mechanical and Electrical Specifications Weight 0 2 Ibs 90 grams Electrical 500mA at 5V over USB connection or 500mA per dock when a chain is supplied by external power 91 23 Docking Station Reference 23 4 LED Reference Docking stations contain a RGB LED capable of outputting a wide array of colors to the user to indicate its current state The following colors are used white O red yellow green cyan 0 blue 0 magenta and led off _ All LED patterns are output on a repeating cycle which may vary in period depending on the pattern In all cases the last color listed will stay constant until the pattern repeats For example _e will blink yellow twice and then stay off until the pattern repeats State LED Pattern OK e Powered off USB suspended or booloader pause e OK but USB not enumerated 6 Power problem Need to plug in external power or USB power Docking in progress O_ Docked but SD unavailable to host e SD Card mounting in progress ee SD Card mounted and avaliable to host e SD card read access in progress oe USB error e Error eo Error SD card mounting error 60 Error in dock USB hub problem 0_0_0_ Firmware error type 4 contact support 0 0 0 0 Firmware er
39. ationVersion Version of the calibration data used to convert from raw samples to calibrated SI units VersionString1 Firmware version string 1 VersionString2 Firmware version string 2 VersionString3 Firmware version string 3 CalibratedDataPopulated 1 for populated 0 for unpopulated LocalTimeOffset Time in milliseconds to add to UTC to convert to local time SyncValue Dataset containing the internal sync value for each sample Units Attribute string containing the timestamp units 1 2560th of a second since 0 00 Jan 1 1970 UTC Time Dataset containing a timestamp for each sample Units Attribute string containing the units microseconds since 0 00 Jan 1 1970 UTC ButtonStatus Dataset containing the button status for each sample 1 pressed O unpressed Calibrated Group containing calibrated data lt Accelerometers Dataset containing accelerometer data Nx3 Units Attribute string containing the accelerometer units m s Range Attribute containing the range setting for the accelerometer 2g or 6g lt Gyroscopes Dataset containing gyroscope data Nx3 Units Attribute string containing the gyroscope units rad s lt Magnetometers Dataset containing magnetometer data Nx3 Units Attribute string containing the magnetometer units uT lt Temperature Dataset containing the temperature Nx1 Units Attribute string containing the temperature units C TemperatureDerivative Dataset containing the temper
40. ature derivative Nx1 Units Attribute string containing the temperature derivative units C s Orientation Dataset containing the orientation quaternion Nx4 The orientation is relative to a magnetic north west up reference frame The scalar component of the quaternion is the first element Raw Group containing raw data if selected during import Accelerometers Gyroscopes Magnetometers DataFlags OptData Temperature TemperatureDerivative 20 3 2 Version 2 e MonitorLabelList Attribute containing an array of monitor labels in the same order as the CaseldList e CaseldList Attribute containing an array of monitor case IDs in the same order as the MonitorLabelList e FileFormatVersion Attribute containing the file format version 2 e Annotations Table containing annotations 76 20 Working with HDF5 Files Time Annotation time in epoch microseconds Case ID A movement monitor case ID associated with the annotation Annotation The annotation string e AA XXXXXX A group is included in the file for each monitor in the CaseldList with the name equal to the case ID SampleRate Attribute containing the output data rate for the monitor DecimationFactor Decimation factor for the monitor s internal processing ModulelD The module ID for the monitor TimeGood Flag indicating whether the time has been set on the monitor since it powered on RecordingMode One of Wireless streaming
41. by selecting single clicking a trial from the table and clicking on the Plot Data button This button will be disabled if the trial has not yet been recorded e You can generate trial level reports by selecting single clicking a trial from the table and clicking on the Generate Report button This button will be disabled if the trial has not yet been recorded e The current status of the trial Not Started or Recorded is indicated in the last column of the table 21 6 Instrumenting the Subject 6 Instrumenting the Subject Testing requires 6 different sensors to be placed on the subject e Left and right wrists monitors with velcro strap attachments e Left and right ankles monitors with velcro strap attachments e Trunk monitor with the chest holster e Lumbar monitor with the elastic belt attachment 22 6 Instrumenting the Subject Use the following visual guide and written tips for instrumenting the subject with the monitors 9 d 1 R I Left Y an P y x Front Back e Before placing the monitors on the subject check to make sure that The System Status indicator on the left panel in Mobility Lab says Ready The LED on the access point is blinking green indicating a good wireless signal The LEDs on the monitors are all blinking green in unison indicating that they are synchronized e As a rule of thumb the LED on each monitor should be oriented
42. ct baseline data during which the subject is asked to stand or sit quiescently Other test types e g Sway start immediately after pressing the record button in the subject instructions dialog This type of countdown will be indicated by a red font type 7 5 2 Stopping the Recording Some test types e g TUG are indeterminate in length and require that the test administrator click on the green Stop button to end the recording Other test types e g Sway are fixed length and will stop automatically once the recording duration has completed Either type of test can be stopped prematurely by pressing the Stop button W 27 7 5 3 The Real Time Data Plot The real time data plot provides a view of the raw data as it is being recorded This can provide a visual indication that the data is being collected as expected For tests that require multiple monitors you can use the Select Monitor combo box to choose among the various monitors in your setup 7 5 4 Latency Typical latency for the wireless streaming of data is between 0 2 0 4 s It is possible however that the latency may increase beyond this value Some cases where this may occur are e Crowded wireless spectrum The 2 4 GHz spectrum that the Mobility Lab system uses for wireless transmission is also used by numerous other consumer and industrial electronic devices such as cord less phones computer WiFi networks and Bluetooth devices e Poor wirel
43. d onto the back of the monitor cases 4 After successful configuration undock the monitors In a few moments 10 seconds they should start blinking green in unison indicating that they are synchronized The access point should also start blinking green at this time indicating a good wireless signal has been established 4 4 Charging The monitor s batteries will charge whenever they are docked and the power supply is attached to the docking station It is not necessary to have the computer on or the USB cable attached to charge the monitors If they configuration status of the system is Ready and the monitors have not been powered off See the next item the monitors will turn on and will be ready for more recording when they are undocked 15 4 5 Powering Off If the monitors are fully charged or you want to store them overnight or for a longer duration you can power them off To do so dock the monitors you want to power off and click on the Power Off button They will remain charging as long as they are docked but will power off the next time they are undocked 4 6 Re applying your saved configuration If you power off your monitors reboot or put your PC to sleep or unplug the access point you will have to re apply your saved configuration before recording This process happens automatically when Mobility Lab is started up and you will be prompted to plug in all of your hardware before the configuration is re ap
44. deo 14 4 Before Recording the Trial Prior to recording the trial verify that the subject e has his or her arms comfortably by their side e is standing behind the piece of tape at the start of the walkway e is looking ahead at a fixed object or picture 14 5 Recording the Trial e To begin recording press the Record button or press the enter key Q Record e The time counter will start counting upwards When it reaches 30s the test administrator should say Walk e During the test the examiner should be Spotting the patient as needed for safety by walking slightly to the side and behind the subject so as not to affect their pace e When the patient has completed the turn returned to the start tape strip and is standing still press the Stop button 45 14 The Instrumented Stand and Walk ISAW Test e The system will continue collecting data for 3 seconds Please ensure that the patient is motionless during this time e The computer will then confirm that the trial has ended by closing the testing window and displaying the confirmation dialog Here you can enter any notes about the recording if necessary Choose to either keep or discard the recording e f a subject error occurs during the trial such as Incompletion of the course The subject uses his her hands during sit stand or stand sitnot due to necessity The subject does not fully cross the line The subject makes an
45. e and clicking on the Generate Report button This button will be disabled if there are no recorded trials for the session e The current status of the session Not Started Incomplete or Complete is indicated in the last column of the table It is considered complete when all of the session s trials have been completed e To view the trials associated with a specific session drill down you can either Select single click the session in the table then click on the Trials tab Double click on the session in the table 20 5 Managing Meta data 5 4 Trials r E gt y 1 N sa Setup jo Studies 4 Subjects Sessions H Trials N al gt Trials for session created on Mon Dec 10 23 25 01 PST 2012 Trial Condition Notes Status Date ITUG trial 1 default Q Complete Mon Dec 10 23 25 59 PST 2012 ITUG trial 2 default Not Started ITUG trial 3 default Not Started KENAN NAN D ee rr ISway trial 2 default A Not Started ISway trial 3 default A Not Started Trial Actions e Trials represent the recording of a specific test For example a single session may include 3 TUG trials and 3 Sway trials e To start a trial click on the Start Trial button See Section 7 for more information e The trial notes can be edited by selecting the desired traial in the Trials table and clicking on the Edit Trial button on the bottom of the screen e You can generate a raw data view
46. e PS 2 extension cables can be cut into excellent pigtails for this connector 17 4 1 RCA Inter AP Sync Connector e RCA Connector Digikey Part number RCP 021 CUI INC e Center Pin Inter AP Sync e Sheild Isolated Ground 17 4 2 6 Pin Digital Input Output Connector e 6 Pin Mating Connector Digikey part number CP 2060 ND CUI Inc part number MD 60 e 6 Pin Mating Pig Tail Cable Digikey part number 839 1051 ND e Note these connectors may need the outer shell trimmed to fit into the AP case a better solution is often pigtail cables that have over molded ends and excellent strain relief AP 6 Pin Digital Connector e Pin 1 Record In 64 17 External Synchronization and I O e Pin 2 Output Voltage Select When connected to positive pin 6 I O will be in 5 volt mode 3 3 volt mode otherwise e Pin 3 Isolated Ground isolated gnd e Pin 4 Inter AP synchronization output signal 2 56 khz square wave used for synchronizing timing among multiple access points e Pin 5 Record Out e Pin 6 Isolated Vdd unregulated 3 3 V or 5 V depending on whether it is connected to pin 2 The auxiliary power supply is meant to provide for powered external interface solutions allowing a small circuit to be powered directly from the AP Accessed via pin 6 of the mini din connector the auxiliary power supply is rated for operation up to 250mW at 3 3V or 5V operation While default operation is at 3 3V 5V operation can be selected by shorti
47. e hardware 21 9 2 Movement Monitor LED Reference Movement monitors contain a RGB LED capable of outputting a wide array of colors to the user to indicate its current state The following colors are used white O red yellow green cyan 0 blue 0 magenta 6 and led off In the off state the LED will appear as a non illuminated white dot in the corner of the monitor opposite the docking connector All LED patterns are output on a repeating cycle which may vary in period depending on the pattern In all cases the last color listed will stay constant until the pattern repeats For example will blink yellow twice and then stay off until the pattern repeats 84 21 Monitor Reference State LED Pattern Startup Mode boot loader Startup wait 5 sec v1 0 bootloader v1 e Startup wait 5 sec v1 1 bootloader v2 e Failed to load firmware e Boot loader mode O Firmware Mode Docked mode pre charging very low battery o Docked mode bulk charging low battery eo fast Docked mode trickle charging 80 100 charge e e slow Docked mode full charge e Docked mode battery error ee Docked mode wait e Docked mode error 4 6 Reset mode O Transitioning into standby or powering off eo Hold mode eo Run mode battery level 4 full E E Run mode battery level 3 0_0_0_
48. e instead of streamed 78 20 Working with HDF5 Files Accelerometers_Raw Dataset containing raw accelerometer data Nx3 Gyroscopes_Raw Dataset containing raw gyroscope data NV x3 Magnetometers_Raw Dataset containing raw magnetometer data Nx3 Data Flags Dataset containing flags used for processing the raw data Opt_Data Dataset containing several measurements taken at a low data rate Temperature_Raw Dataset containing lowpass filtered but uncalibrated temperature data Nx1 20 4 Working with HDF 5 in MATLAB MATLAB contains two high level functions for working with HDF5 files Additional help and examples are included in the built in help documentation for these functions hdf5info reads the structure of the file and all of the attribute values and returns them in an easy to browse MATLAB structure hdf5read reads a complete dataset or attribute from the HDF5 file Additionally one more high level helper function is included with the APDM movement monitor software This function also contains built in help documentation and examples hdf5readslab reads a portion of a dataset from the HDF5 file 20 5 Examples Below is simple example of loading acceleration data from an APDM movement monitor HDF5 file version 2 or later in MATLAB For version 1 files the dataset paths simply need to be changed to match the format listed above filename example h5 try vers hdf5read filename FileFormatVersion catc
49. e relevant for future analysis of the raw data These notes can also be added or edited from the Trials table in Mobility Lab e Redo the trial you just recorded e Discard the trial you just recorded and return to the Trials tab in Mobility Lab e Validate the trial you just recorded For more information about validation see Section 9 e Keep the trial you just recorded and return to the Trials tab in Mobility Lab e Keep the trial that you just recorded and continue to the next trial This option is not available for the last trial of the session e Validate the entire session and return to the Trials tab in Mobility Lab This option is available for the last trial of the session 29 8 Remote Control 8 Remote Control Mobility Lab supports the use of a remote control to aid while collecting data This functionality makes it possible for a single attendant to collect all of a session s data while following and possibly assisting the subject 8 1 Supported Remotes Mobility Lab has been designed to use a standard presentation remote intended for navigating a slide pre sentation Our preferred remote is the Logitech R400 but other presentation remotes will most likely work out of the box because the buttons are typically standardized 8 2 Enabling the Remote Enabling and disabling the remote can be performed in both the configuration tab and in the Subject In structions screen prior to recording a tria
50. e the Add button at any level to create a new subject session etc See Section 5 for more information on managing study meta data 24 7 3 Starting the Trial Once you have selected the trial you wish to record either double click on it or press the Start Trial button to continue 7 4 Subject Instructions Dialog After starting the trial the subject instructions dialog will first be presented These are not typically the full set of instructions for the subject but rather some key reminders that could be read aloud to the subject before each trial Subject Instructions for ISway test Stand quietly with your arms folded across your chest Look straight ahead at a fixed object and remain still without talking or moving You should stand naturally not rigidly Remain in this stance until you hear the tone or are told the test is complete Options Annotations goa Enable Remote 1 Freezing of gait gt 4 Exit Subject Video _ Enable External Sync kah Loss of balance The current test is Sway trial 1 The next test is ISway trial 2 Q Record Along the bottom of the subject instructions dialog there are three buttons Back Subject Video and Record 7 4 1 Back Button The Back button will cancel the recording of the trial and will take you back to the Trials table in Mobility Lab 25 7 4 2 Subject Video Button The Subject Video button will play a sh
51. ect on bias for each sensor axis The bias value for a particular temperature is linearly interpolated from this table 72 19 Calibration 19 1 3 Magnetometers The calibrated magnetometer measurements are calculated as Meal MCS T Mraw a br 1 0 0 cos 0 sin cos sin 0 M 0 cos sin0 0 1 0 sing cos9 0 0 sin cos sin0 O cos 0 o 1 COS yy COS Sxz Sin S yy SiN Sxz C SIN Syy COS Sxy COS Syz SiN Syz SiN Sy SiN Syz COS y COS Syz Sx Tsy7 0 0 Sr 0 Sy TSy T 0 0 0 Sz Ts 7 Dir 3 br b r bir where M is the misalignment matrix C is the cross axis sensitivity matrix S 7 is the temperature dependent scale factor matrix and br is the temperature dependent bias vector There is a look up table for the temper ature effect on bias for each sensor axis The bias value for a particular temperature is linearly interpolated from this table 19 1 4 Temperature The calibrated temperature measurements are calculated as T s T bag 20 where s is the scale factor T is the raw sensor reading and bz is the raw temperature value at 20 degrees Celsius 19 2 Factory Calibration Your monitors come pre calibrated from APDM Each monitor is calibrated individually in a procedure that de termines optimal scaling factors and offsets for the accelerometers gyroscopes and magnetometers across a wide range of orientations and temperatures 73 19 Calibration 19 2 1 Updating Factory Cal
52. ee Ak a 743 ROCO Button lt 5 acca AE AA A A Bake The Recording Dialogi osp eassa Ew ee eee BAER ES ke Oe eee ee 7 51 Quiescent COUMIGWH ack ee hind eae ea hw we oe ee ase ee Be Boe oe 11 12 12 13 13 14 14 15 16 16 17 18 19 20 21 22 7 5 2 SOOO INS RECardiNG y ia keke EA A KE 7 5 3 The Real Time Dala Plot a aa eee eee CE a a Na ws Poe EMEC 55 aa sa bee e de eet bee DE wd eas CSRS ees OS TO SOMO Wee ogc ee eee Ree ER ee EE OO ee A 8 Remote Control 8 1 Supported Remotes gt a parra iaa SRA 8 2 Enabling the REMOTE lt a aa PRA ERS ew Rae E Ng E Se Eee i de 8 3 Supported ACtonS kee civ hee PRES ee A A a E A Bek 9 Validating Your Data 10 Reporting Your Data 11 Exporting Your Data 12 The Instrumented Timed Up and Go ITUG Test t21 Test Environment Sap lt lt marees a a a a a Sd be E o a OE as 12 2 SUDAN lt ke gee BSE ee AAA E 12 3 Instructing the Subject 2a ck ba Seka RE eae ERS RE See ER EK 124 Bere Recording the Trial sc c sa 688404 oe ew oe be Paw LG RAS ES RGD 12 5 Rec rding the Mal lt lt os oh ee eee REESE ee HS ee he ee es 12 6 ITUG Measure Definitions 2 6282 es eee eee 2 5 ds e ee 126 1 Ted UO ANE GD naci bee Oh eee See ee ed bade Lk eR RS BGS 1262 he O NO esas d e he re eS ee a NAD ARI TEORIA 1264 TUD cirios a a ea dae de PA MA AN 13 The Instrumented Sway ISway Test 13 1 Test Environment Sap s ee bee bebe ea ELSE SA he HEAL EE BO SE 13 2 Instructing Wie SUDJ
53. eration can be software selected at time of configuration for both input and output signals e Note The pin diagrams below show the interface on the AP and not the cable The pin layout on the cable is the mirror image of these diagrams e Note A cable designed to trigger recording in Mobility Lab from an external synchronization event must make use of isolated ground pin 3 and record in pin 1 Assuming a voltage range of 3 3V these are the only pins that need to be implemented If the voltage range is 5V pins 2 and 6 must be connected e Note A cable designed to trigger an external system when recording is started or stopped in Mobility Lab must make use of isolated ground pin 3 and record out pin 5 Assuming a voltage range of 3 3V these are the only pins that need to be implemented If the voltage range is 5V pins 2 and 6 must be connected 65 17 External Synchronization and I O 17 4 3 External Sync Box The external sync box is meant to allow for easy access to the access point external digital expansion port A shielded straight through six conductor cable connects the AP to the sync box BNC connections outside the box allow for simple connections to remote equipment AP External Sync Box Three external BNC connections e AP AP This connection should only be connected to another AP it is used to keep multiple APs in sync and can be used to connect multiple APs in a star or daisy chain configuration both will w
54. es to this computer select Yes Note If you have an NEC Renesas USB 3 0 controller you must upgrade to the latest driver and firmware versions available at http www station drivers com page renesas htm Make sure to match the chipset number you have to the firmware driver version you are downloading You can check this using device manager under the Universal Serial Bus Controllers section You will see an Renesas Electronics USB 3 0 Host Controller or a Renesas Electronics USB 3 0 Root Hub 11 3 Installing Mobility Lab 3 1 Windows XP USB Peripheral Behavior Windows XP will prompt you with the Found New Hardware wizard every time you plug an access point or docking station into a USB port for the first time This happens even if you have already installed it on a different port and may even happen if you have already installed it on the same port This is a feature of Windows XP and not an issue in Vista or Windows 7 8 If you have a chain of multiple docking stations you will be prompted for each one When you are prompted with the Found New Hardware wizard e Select the No not this time option and click Next e Select the Install the software automatically option and click Next 3 2 Installing 3rd Party Software e Run the vcredist installer This installs certain Microsoft tools required by the Matlab runtime e Run the MCRinstaller This installs the Matlab run
55. esents the external synchronization signal being sent to the access point The blue shaded region represents the period that will be recorded in Mobility Lab Input triggers are only processed when the External Sync option is specified in the Record Duration panel of the Stream dialog 17 2 2 Input Trigger Level Input triggers can be either low or high depending on the nature of the signal generated by your external synchronization source 61 17 External Synchronization and I O 17 2 3 Input Trigger There are three input trigger options available e Start The external trigger will only be used to start recording in Mobility Lab e End The external trigger will only be used to stop recording in Mobility Lab e Both The external trigger will be used to start and stop recording in Mobility Lab 17 2 4 Sample Selection with External Input Trigger Events The time of the external input trigger events may not align exactly with the time of an individual samples being collected in Mobility Lab due to the discreet sampling interval If the start trigger event time does happen to align exactly with a sample captured in Mobility Lab the first sample recorded will correspond exactly to the time of the start trigger event If these do not align exactly as will generally be the case the sample preceding the start trigger event will be the first sample recorded Similarly if the stop trigger event aligns exactly with a sample
56. ess signal It is recommended that there is clear line of sight between the access point and the instrumented subjects The face of the access point should be pointing as much as possible towards the area the subject will occupy during testing e Obstruction Sometimes one or more monitors will become obstructed during the trial For example this may happen while the subject crosses their arms during a Sway test or the back of a chair may block the signal from a monitor work on the lumbar region In most cases some additional latency will not be a problem The data is buffered to the monitors while recording and will stream wirelessly once the obstruction has been removed It is however important to have a clean signal at the time the system is preparing for recording This happens when the subject instruction dialog is first opened and before the Record button is enabled It is important during this time to have the access point directed at the subject and to have all of the monitors unobstructed 28 7 6 Saving Trial Data After a trial has ended either automatically for fixed duration recordings or by pushing the Stop button you will be presented with the confirmation dialog Recording Complete 1 Do you wish to keep this recording i Notes lt Redo Trial A Discard and Exit Q Validate Trial Q Keep and Exit gt Next Trial In this dialog you can e Add notes that may b
57. ession or each TUG trial BAD FOOTWEAR AL GOOD FOOTWEAR Before clicking on the Start Trial button make sure that e The LED on the access point is blinking green indicating a good wireless signal Ifthe access point is blinking red or green red you may not have a good wireless signal or one of the monitors may be obstructed For example it is possible that the subject is covering one of the monitors with a limb If this is true reposition the subject and or reposition the access point to get a better signal If the walkway is 52 15 The Instrumented Long Walk IWalk Test longer than the range of the monitors 30m with good line of site the data will be buffered on the monitors themselves and will stream to the computer when back within range If there is a lot of catch up to do when the trial is finished there will be a progress indicator to show how much of the buffered data still needs to be sent before saving the trial 15 3 Instructing the Subject After clicking on the Start Trial button in Mobility Lab you will be presented with the subject instruction dialog and the following written instructions e When say Walk start walking at a natural and comfortable pace When say Stop stop where you are and wait for the beep or are told the test is complete The first time the subject takes the test they should view the video instructions by clicking on the Subject Video bu
58. g height second Stride Velocity L of Subjects Shanks Walking speed of left leg height second Values are given relative to the subject s body height to enable comparison to normative data If the subject s height is entered through Mobility Lab then values will additionally be provided in units of meters 48 14 The Instrumented Stand and Walk ISAW Test Measures Cadence Steps minute Temporal gait measures Sensors Shanks Description Stepping rate Gait Cycle Time Time seconds Shanks Duration of a complete gait cycle Double Support Yo of GCT Shanks Percentage of a gait cycle that both feet are on the ground Swing of GCT Shanks Average percentage of a gait cycle that either foot is off the ground Swing R Yo of GCT Shanks Percentage of a gait cycle that right foot is off the ground Swing L Yo of GCT Shanks Percentage of a gait cycle that left foot is off the ground Stance of GCT Shanks Average percentage of a gait cycle that either foot is on the ground Stance R of GCT Shanks Percentage of a gait cycle that right foot is on the ground Stance L of GCT Shanks Percentage of a gait cycle that left foot is on the ground Initial Contact R Time seconds Shanks The time relative to the beginning of the trial that right foot hits the ground Sometimes referred to as
59. h try vers hdf5read filename File_Format_Version catch error Couldn t determine file format end end if vers lt 2 error This example only works with version 2 or later of the data file end 79 20 Working with HDF5 Files caseldList hdf5read filename CaseldList groupName caseldList 1 data accPath groupName Calibrated Accelerometers fs hdf5read filename groupName SampleRate fs double fs acc hdf5read filename accPath Transposed to make Nx3 in MATLAB t l size acc 1 fs figure plot t acc A more complicated example using the flexibility of HDF5 to load and process only part of a data set This can be useful when the data set is too large to fit into memory Care is taken not to attempt to read beyond the end of the file filename example h5 try vers hdf5read filename FileFormatVersion catch try vers hdf5read filename File_Format_Version catch error Couldn t determine file format end end if vers lt 2 error This example only works with version 2 or later of the data file end idList hdf5read filename CaseldList groupName idList 1 data accPath groupName Calibrated Accelerometers fs hdf5read filename groupName SampleRate fs double fs fhandle H5F open filename H5F_ACC_RDONLY H5P_DEFAULT dset H5D open fhandle groupName Calibrated Accelerometers H5P_DEFAULT dspace H5D get
60. he gyroscope units rad s lt Magnetometers Dataset containing magnetometer data Nx3 Units Attribute string containing the magnetometer units uT lt Temperature Dataset containing the temperature Nx1 Units Attribute string containing the temperature units C TemperatureDerivative Dataset containing the temperature derivative Nx1 Units Attribute string containing the temperature derivative units C s Raw Group containing raw data if selected during import lt Accelerometers Gyroscopes lt Magnetometers lt DataFlags lt OptData 77 20 Working with HDF5 Files lt Temperature lt TemperatureDerivative 20 3 3 Version 1 This version is deprecated All new files created will use the most recent version e Device_List Attribute containing a list of monitors present in the file e File Format Version Attribute containing the file version e Annotations Table containing annotations Time Annotation time in epoch microseconds Device ID A movement monitor ID associated with the annotation Annotation The annotation string e Opal_xxx Group containing information about and data from monitor ID xxx Sample Rate Attribute containing the output data rate for the monitor Decimation_Factor Decimation factor for the monitor s internal processing Time_Good Flag indicating whether the monitor has had its time set since turning on Decimation Bypass Internal use deprecated Calibration_Versi
61. he wireless streaming modes and the Stream dialog is open The implementation is adaptable to a number of scenarios Here are some examples of things you can do e Trigger recording in Mobility Lab when external events occur You can use this functionality to precisely synchronize your inertial recordings with for example recordings initiated on a camera based motion capture system e Trigger external events when you start and stop recording in Mobility Lab You can use this functionality to precisely synchronize your inertial recordings initiated in Mobility Lab with to use another example a video recording system e A combination of the two For example hitting the record button on a camera based motion capture system could trigger recording in Mobility Lab which could then trigger a video recording system External Synchronization Q O Configure your system to start and or stop recording from external events or to trigger external events when you start and or stop recording Select Access Point To Configure 9149 Input Trigger Shape Level Level High Trigger Both PV cccccccccccccsces KAKAK KAKA KAKA KA KAKAK SE OV e The black line represents the input into the access point s synchronization port e The blue region represents when recording is triggered in Motion Studio e In this figure the start and end of the recording is triggered externally but it could be started or stopped manually as well
62. heel strike Terminal Contact L Time seconds Shanks The time relative to the beginning of the trial that right foot leaves the ground Sometimes referred to as toe off Initial Contact L Time seconds Shanks The time relative to the beginning of the trial that left foot hits the ground Terminal Contact L Time seconds Shanks The time relative to the beginning of the trial that left foot leaves the ground 49 14 The Instrumented Stand and Walk ISAW Test Measures Shank RoM Ranges of motions RoM and angular velocities Degrees Sensors Shanks Description RoM of shanks averaged of the left and right sides RoM Shank R Degrees Shanks RoM of right shank RoM Shank L Degrees Shanks RoM of left shank Peak Shank Velocity Degrees seconds Shanks Peak 95 angular velocity of shanks Average of the left and right sides Peak Shank Velocity R Degrees seconds Shanks Peak 95 angular velocity of right shank Peak Shank Velocity L Degrees seconds Shanks Peak 95 angular velocity of left shank Peak Arm Velocity Degrees second Shanks Arms Peak 95 angular velocity of arms Average of the left and right sides Peak Arm Velocity R Degrees second Shanks Arms Peak 95 angular velocity of right arm Measured as the norm of 3D angular velocity vector Peak
63. ibration There may be rare cases where the factory calibration data is deleted from your monitor s due to an issue with the SD card In these scenarios it may be necessary to re flash the factory calibration onto your monitor using the Flash Factory Calibration button in the monitor tab of the configuration dialog If you believe that you have a poorly calibrated monitor and would like to discuss your options contact our support team using the contact information provided in Section 24 19 3 User Calibration While the factory calibration is optimal at the time of shipping all low power sensors like the ones used in APDM s monitor s are subject to small changes over time and may require re calibration This is something that can be done by APDM but we are also dedicated to providing tools to enable end users to recalibrate their own devices 19 3 1 Magnetometer Recalibration To perform this task click on the Tools gt Recalibrate Magnetometer option in the menu bar This wizard will guide you through the process of recalibrating the magnetometers on your monitor s The wizard asks that you only undock and collect calibration data one monitor at a time because they must each be moved independently away from other objects that may disrupt the magnetic field including other monitors 19 3 2 Gyroscope Recalibration To perform this task click on the Tools Recalibrate Gyroscopes option in the menu bar This wi
64. in the top left corner after it is placed on the subject For the wrist monitors this should hold true when the subjects arms are down at their side Top Bottom e The wrist monitors should be worn on the top of the wrist and underneath any clothing as a wrist watch would be e The ankle monitors should be worn on the front of the ankles and underneath any clothing e The shoulder harness and belt can be worn over clothing 23 7 Testing Testing is the process of 1 Selecting a trial to complete 2 Providing instruction to the subject such that the test can be completed in specific way 3 Recording the trial 7 1 Current Selection The current selection is always displayed in the upper left panel Current Selection Study Name Mobility Lab Study Subject Public ID S02 Session Creation Date Mon Dec 10 23 25 01 PST 2012 Test Type ISway Test Condition default By default the first incomplete trial from the first subject in the first study is selected You can use the tabs at the top of the Mobility Lab interface to navigate the different levels of this selection jo Studies 4 Subjects O Sessions 1 I Trials 7 2 Selecting a Trial In order to change the current selection start by pressing the study tab in the Mobility Lab workspace p Studies Double click on the active study to drill down to the list of subjects for the study Repeat this process to select the desired selection and trial Us
65. incorrect turn goes around the line instead of across e The examiner can press the Stop button stopping the trial in the middle of testing The examiner should then inform the subject of the error and how to correct it If it is believed that the subject can complete the trial successfully then the trial should be re done e The subject instructions visible in the dialog box should be read aloud to the subject on each subsequent ISAW trial within reason to ensure that the proper behavior is enforced for each trial 46 14 The Instrumented Stand and Walk ISAW Test 14 6 ISAW Measure Definitions The Instrumented Stand and Walk ISAW analysis algorithms automatically processes recorded movement data and provide objective measures related to four major components of the test sway gait anticipatory postural adjustments APA and turning The primary outcomes in each table are highlighted by bold text These measures might be of primary interest for clinical applications Researchers might be interested in both primary and secondary outcomes 14 6 1 Sway All sway measures are assessed using the 3 axial accelerometer from the lumbar sensor All details are in Mancini M et al 2 Measures Unit Description Jerk m s Smoothness of sway from time derivative of acceleration NJerk AD Normalized Jerk normalized to range of acceleration excursion and duration Time Domain Measures Sway area computed as the area i
66. ion of 180 turn Measured according to the mathematical model of turning Number of Steps Number Shanks Trunk Number of steps during 180 turn Steps which are at least 50 within turning period are counted Peak Turning Velocity Degrees second Trunk Peak 95 angular velocity of turnk during turning Step time Time seconds Shanks Trunk Average step duration during turning Step time before turn Time seconds Shanks Trunk The last step duration right before the turn 51 15 The Instrumented Long Walk IWalk Test 15 The Instrumented Long Walk IWalk Test 15 1 Test Environment Setup e The IWalk is an open ended test requiring only that the subject walk at least 5 full gait cycles e The walkway should be straight e It is not required that a turn be present in the walkway but it needs to be a 180 degree turn to ensure proper detection and to be comparable with the normative turn measure data e Each trial can include any number of turns i e the subject can walk back and forth any number of times 15 2 Subject Attire e The subject should wear clothing that does not bind or impede their movement in any significant way e The subject should wear comfortable walking shoes i e no high heels or flip flops If the subject does not have appropriate shoes please have them walk barefoot no socks and MAKE A NOTE in the comments section of either the s
67. ion of either the session or each TUG trial BAD FOOTWEAR GOOD FOOTWEAR Before clicking on the Start Trial button make sure that e The LED on the access point is blinking green indicating a good wireless signal If the access point is blinking red or green red you may not have a good wireless signal or one of the monitors may be obstructed For example it is possible that the subject s crossed arms are covering a wrist or trunk monitor If this is true reposition the arms and or access point to get a better signal 44 14 The Instrumented Stand and Walk ISAW Test 14 3 Instructing the Subject After clicking on the Start Trial button in Mobility Lab you will be presented with the subject instruction dialog and the following written instructions e Start by standing with your arms at your side Look straight ahead at a fixed object and remain still without talking or moving You should stand naturally not rigidly When say Walk start walking forward at a natural and comfortable pace When you cross the line at the end of the walkway turn around and start walking back After you cross the line at the beginning of the walkway stand with your arms by your side and look straight ahead until you hear the tone or are told the test is complete The first time the subject takes the test they should view the video instructions by clicking on the Subject Video button a Subject Vi
68. ired to be entered Subjects must each have a unique Public ID within a given study Identical Public IDs can be used in different studies to refer to either the same or different human participants e The subject Public ID control value and year of birth can be edited by selecting the desired subject in the Subjects table and clicking on the Edit Subject button on the bottom of the screen e To view the sessions associated with a specific study drill down you can either Select single click the subject in the table then click on the Sessions tab Double click on the subject in the table 19 5 Managing Meta data 5 3 Sessions Studies Subjects Sessions N H Trials apo Setup Sessions for subject S02 Type Date Notes Status 3 ITUG 3 ISway Mon Dec 10 23 25 01 PST 2012 Q Complete ICTSIB Mon Dec 10 23 27 25 PST 2012 Not Started Session Actions e Sessions are defined as a collection of trials that a subject performs This collection is typically specified by the study protocol e Click on the Add Session button to add a new session Any number of sessions can be created e The session notes can be edited by selecting the desired session in the Sessions table and clicking on the Edit Session button on the bottom of the screen e You can generate session level reports of the session s trials by selecting single clicking a session from the tabl
69. ited Sync bad ee 86 9 D CC NS 2 S N 21 10 Technical Drawing uwose ulZer WLUOr er A TE uwos Oz uwose ulZ08 ULC L e Y wue ug LL uwuos g wuwoy el UIGE UZS UI906 WWOg Zr Ul689 EZ 3MOS SZIPOUY 109 9 80000 wAUIWUNIY SINSWWOD wuge s UIL LZ uuwosz UI860 uuws s UVES WU g UICE wuog A UILSO O A POSL Y OXZW wuugg 0 NAHL USEC e LF XYTNONY S00 F XXX 10 XX Q3I3ID3dS ISIMYSHLO SSIINN SJONYAIIOL HN do sgy Od PUD asoq LuNUILUNIY 1909 NINA UOISISA suoisusuwIa JOHUOW Wady 87 22 Access Point Reference 22 Access Point Reference 22 1 Drivers Drivers are provided as part of the SDK distribution and Mobility Lab 22 2 Firmware Updates Updating the movement monitor firmware should be done using the Mobility Lab software 22 3 Mounting and Placement The antennas of the access point are located directly behind the black plastic face of the access point The access point s should be aimed such that this face is in the approximate direction of the area where the movement monitors will be used 22 4 Using Multiple Access Points Having multiple access points is useful when redundancy is needed or when recording from more than 6 Opals To configure multiple access points you must have them a
70. ject instruction dialog and the following written instructions e Stand quietly looking at the picture in front of you Each trial will take 30 seconds and you will have your arms comfortably over your chest You should stand naturally not rigidly but do not talk or move your arms The first time the subject takes the test they should view the video instructions by clicking on the Subject Video button sass Subject Video 13 3 Before recording the trial Prior to recording the trial verify that the subject e has his or her arms crossed across their chest in a comfortable manner 41 13 The Instrumented Sway ISway Test e is looking at the picture on the wall 13 4 Recording the trial e To begin recording press the Record button or press the enter key Q Record e Recording will begin immediately and a 30 second countdown will begin e After the 30 second trial has completed it will stop automatically e The computer will then confirm that the trial has ended by closing the testing window and displaying the confirmation dialog Here you can enter any notes about the recording if necessary Choose to either keep or discard the recording e f a subject error occurs during the trial such as Begins to talk Stumbles accidentally e The examiner can press the Stop button stopping the trial in the middle of testing The examiner should then inform the subject of the error and how to
71. l When the remote is enabled on screen buttons that are mapped to remote functionality will have their standard icons either overlayed or replaced by special remote icons These icons are modeled after those on the Logitech R400 remote to make the mapping clear lt hal o gt O gt Examples of Mobility Lab button icons that map to remote control buttons 8 3 Supported Actions The remote functionality is available on the following screens e The Trials tab can be used to start the selected trial e The Subject Instruction screen can be used to show the instructional video cancel recording the trial or start the recording e The Trial Confirmation dialog can be used to redo the trial go to the next trial or exit back to the Trials tab with or without keeping the trial just recorded 30 9 Validating Your Data 9 Validating Your Data Mobility Lab s validation functionality enables you to determine which if any of your collected data is prob lematic for the analysis routines This may be true if the data collected from a particular trial is aberrant and may be caused by e Placing the monitors incorrectly or on the wrong part of the body e The subject did not follow instructions e The subject had an event e g a fall during the trial e The behavior of the subject during a trial was out of bounds e g runs during the ITUG test instead of walks e A technical problem while recording Other details about valida
72. ld be made The first time the subject takes the test they should view the video instructions by clicking on the Subject Video button sasi Py Subject Video 12 4 Before Recording the Trial Prior to recording the trial verify that the subject is relaxed has his her back is against the chair has his her feet are on the ground behind the start line has his her hands are in their lap 12 5 Recording the Trial e To begin recording press the Record button or press the enter key Q Record e The time counter will start counting downwards on the record dialog 3 2 1 as the baseline data is collected Please ensure that the patient is motionless during this time e When the countdown is complete the test administrator should say Walk 35 12 The Instrumented Timed Up and Go ITUG Test e During the test the examiner should be Spotting the patient as needed for safety by walking slightly to the side and behind the subject so as not to affect their pace e When the patient has returned and is sitting with his her back against the chair press the Stop button e The system will continue collecting data for 3 seconds Please ensure that the patient is motionless during this time e The computer will then confirm that the trial has ended by closing the testing window and displaying the confirmation dialog Here you can enter any notes about the recording if necessary Choose to either keep o
73. n of 180 turn Measured according to the mathematical model of turning Number of Steps Number Shanks Trunk Number of steps during 180 turn Steps which are at least 50 within turning period are counted Peak Turning Velocity Degrees second Trunk Peak 95 angular velocity of turnk during turning Step time Time seconds Shanks Trunk Average step duration during turning Step time before turn Time seconds Shanks Trunk The last step duration right before the turn 58 16 When You Are Done 16 When You Are Done 16 1 Docking Monitors In most situations it is sufficient to simply dock your monitors when not in use When docked monitors stop recording stop broadcasting and start charging their batteries Once fully charged the batteries will enter a trickle charge mode to keep them topped off 16 2 Power Off For transport or storage it is often desirable to power off all system components This can be done by docking the monitors and clicking on the Power Off button in the bottom left corner The monitors will power down the next time they are undocked 59 17 External Synchronization and I O 17 External Synchronization and I O The access point comes with external connectors that enable you to synchronize the recording of data in Mobility Lab with external equipment This functionality only works when the system is configured in one of t
74. n to sit events are both detected the total test time is defined as the period between the initiation of sitting up to the termination of sitting back down 2 If the sit to stand and turn to sit events are not detected the total test time is defined as the period be tween the pressing of the record button and the stop button The 3 second rest period at the beginning and end of the test are subtracted from this total Measure unt besem Total Time Time seconds The total time of the timed up and go test 12 6 2 Sit To Stand Sit to Stand transition is detected and assessed using the signals from the trunk sensor 5 Measures Sensors Description SiSt Duration Time seconds Duration of sit to stand Measured according to the mathematical model of sit to stand transition Peak SiSt Velocity Degrees second Peak 95 angular velocity of trunk in the sagittal plane during sit to stand transition RoM Trunk Degrees RoM of trunk in the sagittal plane during sit to stand transition 12 6 3 Gait Gyroscopes attached on the shanks are used to detect the basic gait events i e time feet hit the ground and leave the ground initial and terminal contacts Temporal gait measures are then calculated based on the time of gait events In the next step ranges of motions RoM of the shank segments are estimated by integrating the gyroscopes signals Finally spatial gait measures are estimated using a biomechanical model
75. ncluded in the ACC per unit of time Amount of sway from root mean square of ACC time series Mean velocity Mean distance from center of ACC trajectory Sway path of total length of ACC trajectory Range of acceleration Area of the 95 confidence circle Area of the 95 confidence elipse Mean frequency the number per second of ACC loops to cover the total sway PATH MF PATH 2 7 DIST x trial duration Frequency Domain Measures CF Hz Frequency of sway from centroidal frequency of power spectrum FD AD Frequency dispersion F95 Hz 95 power frequency frequency below which the 957 percentile of total power PWR is present PWR m s Total power F50 Hz Median frequency frequency below which the 50 percentile of total power PWR is present These measures are calculated for Anterior Posterior forward backward and Medial Lateral side to side orientations in addi tion to the 2D plance 47 14 The Instrumented Stand and Walk ISAW Test 14 6 2 Step Initiation APA All details are in Mancini M et al 1 Measures Description APA ML amplitude m s Peak acceleration toward the stance foot of the lateral trunk acceleration APA AP amplitude m2 s Peak trunk acceleration forward from baseline APA Duration Time s Time from APA onset to end First Step Latency Time s Time to peak angular velocity of the stepping leg from the APA onset
76. ng pin 2 to pin 6 of the 6 pin mini din connector The inter AP sync signal is a 2 56kHz clock signal used to keep multiple AP configurations in sync with one another The inter AP sync signal is available on the RCA connector as well as pin 4 of the 6 pin mini din connector next to it The signal is a square wave pulse that is driven by the master AP usually the first AP to enumerate and received by up to seven additional APs depending on output voltage selection and cable length In operation the signal is weakly pulled up to the isolated power rail by each AP in the system and driven directly to ground only by the master AP to produce the pulsed waveform Two GPIO lines are available one input and one output Both are pulled down by 47 5kQ resistors and each have a series resistance of nearly 1 2kQ due to the methods used to protect the lines from over voltage overcurrent conditions The input signal is available on pin 1 of the 6 pin mini din connector and is typically used to start stop data collection by the host PC Driving the line high to record and low to not record is the default operation though this is user selectable in software to allow for other modes of operation Similar to the input line the output line is typically used to start stop data capture on external systems The line is driven high by the AP when start recording is selected in software and driven low when recording stops Opposite high low op
77. of acceleration Area of the 95 confidence circle Area of the 95 confidence elipse Mean frequency the number per second of ACC loops to cover the total sway PATH MF PATH 2 7 DIST x trial duration Frequency Domain Measures CF Hz Frequency of sway from centroidal frequency of power spectrum FD AD Frequency dispersion F95 Hz 95 power frequency frequency below which the 957 percentile of total power PWR is present PWR m s Total power F50 Hz Median frequency frequency below which the 50 percentile of total power PWR is present These measures are calculated for Anterior Posterior forward backward and Medial Lateral side to side orientations in addi tion to the 2D plance 43 14 The Instrumented Stand and Walk ISAW Test 14 The Instrumented Stand and Walk ISAW Test 14 1 Test Environment Setup e Measure a 7 meter walkway with significant space on either side e Mark the start and finish of the walkway with colored tape on the floor e Ensure that the computer screen is out of the subject s line of sight during testing 14 2 Subject Attire e The subject should wear clothing that does not bind or impede their movement in any significant way e The subject should wear comfortable walking shoes i e no high heels or flip flops If the subject does not have appropriate shoes please have them walk barefoot no socks and MAKE A NOTE in the comments sect
78. ognized by the computer 7 13 6 Dock the movement monitors into their docking stations You should see the lighton the monitors turn dark blue 4 2 Starting Mobility Lab 1 To start Mobility Lab double click on the Mobility Lab shortcut on the computer s desktop task bar or start menu o as 4 3 System Configuration 1 Click on the Setup tab to view your configuration options a b O lt Body Site Check the boxes next to the body sites you with to record from Monitor IDs For each body site you are recording from you must specify the ID of the monitor you will place on that location The monitor ID is a unique number found on the back of each monitor For body sites with left right options e g Legs you must specify a monitor for both the left and right Measures Recording from different body sites enables the calculation of different movement measures This column displays the measures that correspond to each body site and the test type s that provide these measures Wireless Channel Monitors transmit data in the 2 4 ghz wireless spectrum range Channel zero corresponds to roughly 2 40 ghz and channel 90 corresponds to roughly 2 49 ghz Many other consumer electronic devices make use of radio frequencies in the 2 4 ghz spectrum such as 14 Movement Monitor Setup Body Site Monitor IDs Measures _ Head _ Trunk Turning ITUG ISAW IWalk Sit to Stand ITUG
79. om the one used for the magnetometers APDM factory calibration does not compensate for misalignment between the sensors and the case only misalignment between the accelerometers and the other two sensors 19 1 1 Accelerometers The calibrated accelerometer measurements are calculated as deal CS T aw br COS Say COS Sxz SIN Syy sin Sx C SIN Syy COS Syy COS Syz Sin Syz SIN Syz SiN Syz COS Syz COS Syz Sy T syr 0 0 Sr 0 Sy T Sy T 0 0 0 Sz T s r bir gt br byr bzr where C is the cross axis sensitivity matrix S 7 is the temperature dependent scale factor matrix and br is the temperature dependent bias vector There is a look up table for the temperature effect on bias for each sensor axis The bias value for a particular temperature is linearly interpolated from this table 71 19 Calibration 19 1 2 Gyroscopes The calibrated gyroscope measurements are calculated as Ocal MCS Traw br 1 0 0 cos 0 sin6 cos sind O M 0 cos sin0 0 1 0 sin cos 0 O sin cos sin 0 cos 0 o 1 COS S yy COS Syz Sin yy SiN Sy C SIN Syy COS Syy COS Syz SiN Syz SIN Sy SiN Sy COS x COS Syz Sy TST 0 0 Sr 0 Sy Tsyr 0 0 0 Sz T sr bir 3 br byr bzr where M is the misalignment matrix C is the cross axis sensitivity matrix S 7 is the temperature dependent scale factor matrix and br is the temperature dependent bias vector There is a look up table for the temper ature eff
80. on Version of the calibration data used to convert from raw samples to calibrated SI units Version_String1 Firmware version string 1 Version_String2 Firmware version string 2 Version String3 Firmware version string 3 Acceleration Dataset containing data from the accelerometers Nx3 4 Units Attribute string containing the acceleration units m s Angular_Velocity Dataset containing data from the gyroscopes Nx3 lt Units Attribute string containing the angular velocity units rad s Magnetic_Field Dataset containing data from the magnetometers Nx3 lt Units Attribute string containing the magnetic field units a u Temperature Dataset containing the temperature of the monitor Nx1 Units Attribute string containing the temperature units C Temperature Derivative Dataset containing the rate of change of temperature Units Attribute string containing the temperature derivative units C s Sync Value Dataset containing the internal timestamp of each sample Units Attribute string containing the timestamp units 1 2560th of a second since 0 00 Jan 1 1970 UTC lt Time Dataset containing the time for each sample in microseconds since 0 00 Jan 1 1970 UTC Additional fields present when raw data is also stored e Opal_XX Calibration_Data Attribute containing binary block of calibration data Raw File Version Attribute containing the version string of the raw file if this was converted from a apdm fil
81. ons match exit The manual firmware update tool 18 2 1 Flash Default Firmware Your system comes bundled with an up to date version of the firmware Pressing this button will re flash this version of the firmware onto the specified monitor 18 2 2 Flash Alternate Firmware For testing purposes or to address an issue in a timely fashion it may be necessary to flash a monitor with a version of the firmware that is different than the bundled version You will have to specify the alternate firmware file to use with this option 69 18 Firmware Updates 18 2 3 Force Update When using either of the options above if the firmware version on the target device s matches the firmware version to be flashed the device will be skipped If the Force update even if versions match checkbox is selected however the firmware will be flashed even if the versions match This may be necessary in some cases to recover a malfunctioning device 70 19 Calibration 19 Calibration 19 1 Sensor Error Models The errors modeled and compensated for by the calibration are scale factor cross axis sensitivity sen sor misalignment and bias For scale factor there is a linear temperature model and for bias a look up table based temperature model The notation is reused but each type of sensor has distinct calibration parameters For example the scale factor matrix S for the accelerometers is different from the one for the gyroscopes and fr
82. ork e AP In This input to the AP can be configured via software to allow an external device to begin and stop recordings Accepts both 3 3V and 5V logic levels e AP Out This AP output can be configured via software to drive low high or pulse at record start stop points allowing synchronization with an external system Such as a camera motion capture system Note the default configuration for AP Out is 3 3V logic levels though 5V levels can be selected using the voltage select switch located in the top of the box Four LEDs indicators e PWR Lights when power is applied to the external interface e 5V Lights to indicate that the external interface is configured for 5V operation Default is 3 3V Light out e AP In Lights to indicate that the APlln signal is High e AP Out Lights to indicate that the AP Out signal is High Push button and Toggle switch e Push Button Up to select 3 3V operation Down to select 5V operation e Toggle Manually ties the AP In signal to the positive voltage rail allowing for manual triggering of recordings software configured 66 17 External Synchronization and I O Additional connections and functionality are located inside the box and can be accessed by removal of the box top JP1 through JP4 can be removed to disconnect the corresponding LED Six Euro style screw terminals can be used to directly connect to the six wires in the AP cable AP External Sync Box e V Positive
83. ort video for the subject to watch This video should be viewed before the first trial is performed and can be repeated for additional trials if it is believed the subject needs additional instruction Note not all test types will have video instruction available If a specific test does not have video available then the Subject Video button will not become enabled sasa P Saige as 7 4 3 Record Button When the subject instruction dialog is first opened the system is working in the background to prepare for recording Because of this the Record button does not become enabled right away After it has become enabled this typically takes less than 10 seconds clicking on the Record button will start the trial by opening the recording dialog and initiating the recording of data 26 7 5 The Recording Dialog While the recording dialog is open data is being recorded wirelessly from the monitors being worn by the subject Recording Remaining time 101 s Strip Chart F a Stop a E 0 Ps lt 25 Real Time Data Plot M Enable 50 Select Monitor 304 Lumbar 5 25 p x Statistics Latency 0 35 Dropped Samples Recording 0 g 3 25 50 250 0 Mag uT 2 Loss of balance 250 The current test is IWalk trial 1 The next test is IWalk trial 2 7 5 1 Quiescent Countdown Some test types e g TUG require a brief countdown to colle
84. ot is on the ground Stance R of GCT Shanks Percentage of a gait cycle that right foot is on the ground Stance L of GCT Shanks Percentage of a gait cycle that left foot is on the ground Initial Contact R Time seconds Shanks The time relative to the beginning of the trial that right foot hits the ground Sometimes referred to as heel strike Terminal Contact L Time seconds Shanks The time relative to the beginning of the trial that right foot leaves the ground Sometimes referred to as toe off Initial Contact L Time seconds Shanks The time relative to the beginning of the trial that left foot hits the ground Terminal Contact L Time seconds Shanks The time relative to the beginning of the trial that left foot leaves the ground 55 15 The Instrumented Long Walk IWalk Test Ranges of motions RoM and angular velocities Measures Unit Sensors Description Shank RoM Degrees Shanks RoM of shanks averaged of the left and right sides RoM Shank R Degrees Shanks RoM of right shank RoM Shank L Degrees Shanks RoM of left shank Peak Shank Degrees seconds Shanks Peak 95 angular velocity of shanks Average of the left and Velocity right sides Peak Shank Degrees seconds Shanks Peak 95 angular velocity of right shank Velocity R Peak Shank Degrees seconds Shanks Peak 95
85. plied If your monitors are already powered on it is not necessary to have them docked when re applying the configuration This is useful for example if you already have a subject instrumented with a number of monitors and your PC reboots or the access point is accidentally unplugged 16 5 Managing Meta data 5 Managing Meta data Mobility Lab provides a simple interface for associating clinical and demographic meta data with your record ings The user interface is intended for multi subject studies and has a minimal design that is optimized for ease of use in order to minimize training time Meta data captured by Mobility Lab is organized hierarchically using the following structure Study 1 or more e Study description e Subjects 1 or more Subject Public ID ls the subject a control Sessions 1 or more lt Trials 1 or more Test type Condition Notes Status Date File name of recording This structure is mirrored in the tab bar which can be used to navigate and edit this meta data hierarchy E 7 Lp Studies 4 Subjects O Sessions H Trials Mobility Lab does not have any fields that are considered protected health information PHI simplifying the security safeguards that need to be implemented Entry of data is kept at a minimum while providing enough meta data for your recordings to facilitate down stream analysis 17 5 Managing Meta data 5 1 Studies
86. r discard the recording e f a subject error occurs during the trial such as Incompletion of the course The subject uses his her hands during sit stand or stand sitnot due to necessity The subject does not fully cross the line The subject makes an incorrect turn goes around the line instead of across e The examiner can press the Stop button stopping the trial in the middle of testing The examiner should then inform the subject of the error and how to correct it If it is believed that the subject can complete the trial successfully then the trial should be re done e The subject instructions visible in the dialog box should be read aloud to the subject on each subsequent TUG trial within reason to ensure that the proper behavior is enforced for each trial 36 12 The Instrumented Timed Up and Go ITUG Test 12 6 ITUG Measure Definitions The ITUG analysis algorithms automatically processes recorded movement data and provide objective mea sures related to four major components of the tests turning gait sit to stand and turn to sit The primary outcomes in each table are highlighted by bold text These measures might be of primary interest for clinical applications Researchers might be interested in both primary and secondary outcomes 12 6 1 Timed Up And Go The total time of the timed up and go test is calculated in one of two ways 1 If the trunk sensor is present and the sit to stand and tur
87. ror type 5 contact support 00000 Firmware error type 6 contact support 000 000 Bootloader mode Updating firmware O Hardware Error DA 000000 Hardware Error GA 000000 Hardware Error PA 62062062 Hardware Error UA 606060600 92 Q 8 L SD D an 2 S D S S 9 Q ae N 23 5 Technical Drawing uwozzi u005 ulog 1 WUS UWS Ly UlvED wwz ule67 wuusz uy ge WWST 97 UIEEO WLUOS 6y UlE6Z UleS uuuosy9 USES Z wwoszs UILIO Z LLZIVOS LE AVINONV GOD 7 XXX 10 F XxX 03I4ID34S 3SIMAZHIO SSFINN SIONVATIOL azipouy Joa O wnulun uojjog 8 do up ajojd wnulwn POU 108 0 8000 O WNUILUNIY y WOO 8 do saw PUD SJDIA WNUMININ 1909 a ayy SINIWWOO 4200 WOAY awn 31 93 24 Troubleshooting 24 Troubleshooting APDM is pleased to assist you with any questions you may have about our software or about the use of the technology for your application Please contact us at web support apdm com email support apdm com telephone 888 988 APDM 2736 Opal Users Mailing List https mail apdm com mailman listinfo opal users 94 References References 1 M Mancini C Zampieri P Carlson Kuhta L Chiari and F B Horak Anticipatory postural adjustments prior to step initiation are hypometric in untreated parkinson s disease an accelerometer based ap proach Eur J Neurol 16 2
88. s Sensors Shanks Description Mean asymmetry of the left and right stride velocities Stride Length Asymmetry Shanks Mean asymmetry of the left and right stride lenghts Swing Asymmetry Shanks Mean asymmetry of the left and right swing percentage of a gait cycle that either foot is off the ground Stance Asymmetry Shanks Mean asymmetry of the left and right stance percentage of a gait cycle that either foot is on the ground Shank Asymmetry Shanks Mean asymmetry of the left and right shank rotations Peak Shank Velocity Asymmetry Shanks Mean asymetry of the left and right shank velocities Peak Arm Velocity Asymmetry Arms Mean asymmetry of the left and right arm swing velocities Arm SSI Arms Arm Symbolic Symmetry Index 7 Shank SSI Shanks Shank Symbolic Symmetry Index 7 Phase Difference Shanks The phase relationship between the left and right legs 3 Phase Coordination Index Shanks A measure of the consistency and accuracy in the generation of anti phased left right leg movements 3 57 15 The Instrumented Long Walk IWalk Test 15 6 2 Turn Turning is detected and assessed based using gyroscopes within the trunk or lumbar sensor A mathematical model is used to detect the exact moment of beginning and end of turning 4 Measures Turning Duration Time seconds Sensors Trunk Description Duratio
89. s 550 grams Electrical 290mA at 5V over USB connection 89 jeh L SD an E 5 jani Y n O 9 lt N A WULUGS zr UIGZ9 uwz wiws9 6s R JOH p ddo1 0z p l ugg L a WOSE utupe ulZOV PAM utwog 8 Ww zez UlE80 E UIZL 6 E nn Y uuu96 0z wuug s01 UIGZS UlEI LY ULUGS 6E wuwegg 8 UlEZS E MPOLE wuos o1 wwos LIZ J UIE LYS ULZZE B uwgr s F n Ma M m m E uISZ L wusg UIZ9y O S WW9 ZE UIZZCS wwo 49 un eg y a i O e y y lt al JIVOS e L YVINONV S00 XXX 10 XX Q31IDIdS ISIMYJHLO SSI1NN SIDNVYTIOL z z pouy 108 9 8000 0 WUNUILUN Y FN do sav pup pupys 3 yoda LUNUILUN Y 1909 NINA SININWWOO JUIO ASs9DDV WAY www am N N N 90 23 Docking Station Reference 23 Docking Station Reference 23 1 Drivers Drivers are provided as part of the SDK distribution and Mobility Lab 23 2 Power e f running a single docking station it can be powered from a USB cable plugged into a dedicated USB port on your computer a USB cable plugged into a a powered USB hub a USB cable plugged into a wall adapter charging only the external AC adapter charging only e f running a chain of 2 or more docking stations For data transfer both USB and external AC power are required If a power related error occurs then the docking st
90. ss the export button whatever is selected in the current tab is chosen for export Your data can be exported at any level a single trial a session a subject or an entire study e The metadata and analysis results are exported using the comma separated value CSV format This format can easily be read by 3rd party analysis software such as Excel and Matlab e f desired all of the raw data can be exported as well See Section 20 for details on how to work with the raw sensor data e The exported data is archived in the zip format which is supported natively by windows e g you don t need 3rd party zip software e Each test type ITUG ISway etc has its own CSV file within the archive All raw data is put into a separate folder within the archive The Export button 33 12 The Instrumented Timed Up and Go ITUG Test 12 The Instrumented Timed Up and Go ITUG Test 12 1 Test Environment Setup e Measure a 7 meter walkway with significant space on either side Mark the start and finish of the walkway with colored tape on the floor Place a chair without arms or swivel at the start of the walkway just behind the marked tape Ensure that the computer screen is out of the subject s line of sight during testing 12 2 Subject Attire e The subject should wear clothing that does not bind or impede their movement in any significant way e The subject should wear comfortable walking shoes i e no high heels or flip flops
91. time on your computer which is needed for local analysis and report generation Note If you receive an error at the end of the installation indicating Error 1904 Module mwcommgr dll failed to register you may have to reboot your computer and start the MCRinstaller again e Run the MikTex installer When prompted Specity that it be a shared installation all users Use the default installation directory Choose Letter as the preferred paper size Select Yes for Install missing packages on the fly 12 4 4 1 Setup Hardware Setup 1 Plug in the Mobility Lab computer and turn it on Wait for it to fully start up Grab a USB cable with a type B large boxy connector and plug it into the access point Plug the access point into an your computer the computer in your kit may be a different model than the one pictured in the figure You should see the light on the access point turn solid green If multiple docking stations are chained together you must plug the external power adapter into the docking station You should see the the lights on each docking station turn yellow when power is applied Grab a USB cable with a micro small flat connector and plug it into your docking station If you are using a USB hub make sure that it is a USB 2 0 High Speed hub and that it has external power The LEDs on the docking station s should turn to solid green when they are rec
92. tion include e When you press the validate button whatever is selected in the current tab is chosen for validation Your data can be validated at any level a single trial a session a subject or an entire study e Trials will be labeled as either valid or invalid after the validation routine completes e A dialog will pop up if any trials fail validation These files will be indicated e Validating the data provides an error message will provide information about the nature of invalid trials Y pasane The Validate button 31 10 Reporting Your Data 10 Reporting Your Data Mobility Lab s report generation functionality enables you to generate electronic reports summarizing or detailing your data e There are two types of reports Compact Reports These reports are meant to summarize your data in one page per test type ITUG ISway etc Full Reports These reports show you all of the calculated metrics along with details about these metrics raw data plots and more e When you press the report button whatever is selected in the current tab is chosen for export Your data can be exported at the trial session or subject level Compact Full The Report buttons 32 11 Exporting Your Data 11 Exporting Your Data Mobility Lab s export functionality enables you to export your study s metadata analysis results and even raw sensor data into a format for further analysis e When you pre
93. ttached to your computer via USB at the time of configuration Additionally the access points must be linked via RCA cable a standard stereo cable The rest of the configuration is handled automatically 22 4 1 Redundancy In some recording environments it may be difficult to always maintain line of site from your streaming Opals to the access point For example you may have a bend in a hallway or you may be operating in a large open space where you are unlikely to receive a reflected signal if the Opal is pointed away from the access point In these scenarios multiple access points can be used to provide better coverage The streaming Opals will communicate with whichever access point is providing the stronger signal 22 4 2 Streaming from more than 6 Opals Each access point can communicate with up to 6 Opals simultaneously You can therefore stream from up to 12 Opals with 2 access points or 24 Opals with 4 access points 88 22 Access Point Reference 22 5 LED Reference Access points contain a RGB LED capable of outputting a wide array of colors to the user to indicate its current state The following colors are used white O red yellow green cyan 0 blue 0 magenta and led off _ All LED patterns are output on a repeating cycle which may vary in period depending on the pattern In all cases the last color listed will stay constant until the pattern repeats For example _e will blink yellow t
94. tton sass Subject Video 15 4 Before Starting the Trial Prior to recording the trial verify that the subject e is relaxed e is standing and prepared to start walking 15 5 Recording the Trial e To begin recording press the Record button or press the enter key Q Record e After clicking on the Record button the test administrator should say Walk e During the test the examiner should be Spotting the patient as needed for safety by walking slightly to the side and behind the subject so as not to affect their pace e When the trial is complete press the Stop button and tell the subject they can stop walking 53 15 The Instrumented Long Walk IWalk Test e The computer will then confirm that the trial has ended by closing the testing window and displaying the confirmation dialog Here you can enter any notes about the recording if necessary Choose to either keep or discard the recording e f a subject error occurs during the trial such as Incompletion of the course Falling e The examiner can press the Stop button stopping the trial in the middle of testing The examiner should then inform the subject of the error or problem and how to correct it If it is believed that the subject can complete the trial successfully and safely then the trial should be re done e The subject instructions visible in the dialog box should be read aloud to the subject on each subsequent TUG tri
95. wice and then stay off until the pattern repeats State LED Pattern Access point is powered on and is not receiving data from any monitors e Access point is receiving data from all monitors and there is no excessive latency for _ any of the monitors Access point is receiving data from all monitors but there is excessive latency gt 35 in One or more monitors The latency is however decreasing improving This usually indicates that one or more monitors was temporarily obstructed and is now catching up Access point is receiving data from all monitors but there is excessive latency gt 3s in ee one or more monitors which is increasing getting worse This usually indicates that one or more monitors is obstructed and is having trouble transmitting its data Access point is receiving data from one or more but not all of the movement monitors _ Access point is receiving data from one or more monitors that it is not expecting to re or oe ceive data e g there is a monitor configured on another computer system streaming data Access point is in low power USB suspend mode e Access point firmware error type 3 contact support 0_0_0__ Access point firmware error type 4 contact support H E Access point firmware error type 5 contact support E O e_ Access point SDRAM Memory error contact support 60606060606060 22 6 Mechanical and Electrical Specifications Weight 1 2lb
96. zard will guide you through the process of recalibrating the gyroscopes on your monitor s This process can be applied to all of your monitors simultaneously 19 3 3 Accelerometer Recalibration Coming soon 19 4 Clearing User Calibration If you wish to revert to the factory calibration settings you can clear any user calibration that you have applied This can be accomplished through the Clear User Calibration button in the monitor tab of the configuration dialog 74 20 Working with HDF5 Files 20 Working with HDF5 Files HDF5 is the preferred format for storing APDM movement monitor data It is a standard format for scientific data that is efficient and widely supported It uses less space than CSV is faster to load and supports more structured data This section will cover the organization of the APDM movement monitor data and the basics of reading HDF5 files in MATLAB 20 1 HDFView A free program called HDF View http www hdfgroup org hdf java html hdfview can be used to explore plot and export this data into other formats A variety of free open source tools for working with HDF files are also available at http www hdfgroup org HDF5 release obtain5 html 20 2 Data Organization HDFS5 files are organized like a file structure The root of the file contains two attributes One is a list of monitor IDs that have data stored in this file The other is a version number for the organization of the HDF 5 file

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