Pocket A3 Technical Manual - Bio
Contents
1. EEE aR GBS So EE A 9 11 SUB MIEN 15 PUSHBUTTON FUNG TION 16 DISPLAYS E EESE A EEA EAEE AEE A EIEEE 16 CHECKING VALIDITY OF EEG SIGNALS sadesestavsadeiuseccastsdaeCiaeadistest eaves 17 FOGGING DATA onossseesvesodsoeugaeseds ve 18 SUPPORT HUNG IONS 18 SET CLOCK es 18 SET ALARM REINS RNA 18 I BN lt eee 18 APPENDIX 1 MANAGING THE WIRELESS LINK 0 19 APPENDIX 2 PROCEDURE TO PLACE ELECTRODES AND THE 10 20 SYSTEM ccccccccccecssssssececccecsessuececececeesesssceeeeecsesenseseeeeeesenensaaeeeeceeesenees 19 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Pocket sized wireless Biofeedback EEG nIR HEG amp pIR HEG p Fr Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Overview This User Manual describes the Pocket A3 biofeedback trainer The Pocket A3 combines EEG biofeedback generally ref2. aro 6 PROTOCOL QUALITY ASSURANCE othe ee levee eet E 6 E E E casevsseseusebsssiecs 7 CONDUCTION OF ELECTRICITY THROUGH EEG ELECTRODES cscccccccecessessscesececeesesseseceeececseaaeseeececseaaesesececeeeaaeseeececseesasaeeeesesensaseeeeeeees 7 INFECTION RISK av base ua Gah bce ian 7 PRODUCT CARE amp MAINTENANCE KEYS TO LONG PRODUCT LIFE wu 0 ssccccssssscsssscccssnsccecssccecessscccessnsccessseccessscceessnaees 7 neko D ree EE EEE ec ORE E ELPA CEPA TERETE 7 RECHARGEABLE BATTERY c cccccccecssssssececececsesssececececseneaecesececsenesaesesececeesesseseseseceesessaaeseeeceeseauaaeseeececeessaaeeececesessaaeseeeececeeausceeececsensasaeeeceess 7 LED DISPLAY SENSITIVITY 8 STATIC DISCHARGES 8 8 PACKING On ec heath ete ods otic Re bbe E 8 GCONNEGTIOR S E E E sevsaddvessedeseassesedvostededseeesceauesss toasessasesvochuseaseaeckesdivense suostecessbiveceawessstedtessasesvessesecsoes 9
3. and Active 2 to amp C4 respectively see Appendix 2 10 20 system Having connected electrodes to the Pocket the first step is to verify that the EEG signal is valid The Pocket provides some tools to help do this e Ensure that the signals are within the range of the Pocket s offset potential control Select Preset 1 EEG gt PC Then select Go The default display is Probes Towards the centre of the display is displayed the offset potential It can range between 1 7 amp 2 3V however to ensure continued good operation the offset should be between 1 5 amp 2 0V If not adjust the placement of the electrodes e To find a relatively benign environment ie free of excessive 50 60Hz interference the Pocket provides a test mode To select the Test mode go to More Ich and scroll thru Ch1 Ch2 2ch to find Test 50 60Hz Connect electrodes and then connect headphones Selecting Test mode will produce tones in the left and right ear whose 9 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics pitch is proportional to the strength of the 50 60Hz interference Move about and adopt various postures eg feet off the ground to minimise the pitch Also note that the pitch of the tone in the left ear is twice that of the tone in the right ear This can be used to confirm the correct orientation of the headphones Now ensure that the EEG signal looks valid Towards the left of Display Probes the size of the EEG signal is me
4. content of those four channels will depend on menu selections For raw gt PC raw HEG EEG data is transmitted For More protocol gt PC protocol are transmitted Mode EEG wireless Ch1 Ch2 Ch3 Ch4 Operation mode EEG EEG BB 1 2filterPr raw EEG2 EMG2 1 2filterPr protocol EEG filterPr1 EEG filterPr2 EEG pkFreq1 EEG pkFreq2 lcorel coeff lcorel coeff lcorel coeff lcorel coeff AfilterPr raw EEG2 EMG2 4filterPr protocol EEG filterPr1 EEG filterPr2 EEG filterPr3 EEG filterPr4 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics HEG HEG BB 1 2filterPr raw nIR pIR nIR2 Red 1 undefined HEG Red 2 1 2filterPr protocol BASELINED HEG2 baselined EEG filterPr3 EEG filterPr4 AfilterPr raw pIR 1162 Red 1 2 AfilterPr protocol NIR1 BASELINED HEG2 baselined EEG filterPr3 EEG filterPr4 EEG HEG 1 2filterPr raw nIR pIR nIR2 EEG1 EEG2 1 2filterPr protocol BASELINED HEG2 baselined EEG filterPr3 EEG filterPr4 corel coeff corel coeff AfilterPr raw pIR 162 EEG2 AfilterPr protocol baselined HEG2 baselined filterPr3 EEG filterPr4 Binaural Beat raw undefined undefined undefined undefined protocol undefined undefined undefined undefined for Ich eeg operat
5. electrodes captured this is called bipolar mode or there can be a common probe to which all other unpaired electrodes are referenced This is called referential or monopolar mode The bipolar mode has the advantage of being able to measure the differences between various parts of the brain whilst the referential mode allows multiple signals whilst minimising the number of electrodes Of recent times the referential mode is the more common Note that the reference probe can be attached to the body anywhere however most commonly it is attached to the ear on the side of the brain being studied If both hemispheres are being exercised the reference probe can be attached to either ear or to both or along the mid line of the brain It is also required to attach a neutral connector to the user to ensure that the user and the eeg machine are of equal potential This must be done in such a way so as to ensure only minute currents flow between the user and the instrument A simple approach is to link the user and the instrument through a high impedance resistor However the preferred approach is to use an active circuit called a Driven Right Leg DRL circuit This is somewhat of a misnomer since the neutral connector can be placed anywhere on the body In the case of AbhayamudrPocket the neutral electrode is an earclip The 10 20 system describes the locations on the scalp as shown below Nasion Inion The symbols F C P O and T are short ha
6. is the key variable for feedback purposes and appears at the bottom of the screen whilst the scatter display represents about a 15 second history of the real and imaginary components of the cross correlation operation with real being on the vertical axis and imaginary on the horizontal access Perfect positive correlation will produce a cluster at the top of the screen whilst perfect negative correlation will produce a cluster at the bottom of the screen Where there is clustering to the left and right will indicate one hemisphere leading the other phase discrepancy whilst clustering at the centre of the display will indicate poor correlation ie chl eeg signal and ch2 eeg signal are independent Samadhi Samadhi display is similarly only accessible for synchrony It present a visual feedback display of the degree of synchrony magnitude of the complex cross correlation coefficient between the eeg signals of chl and ch2 within the band selected using classical buddhist contemplative poses e Protocol this function allows overriding the value selected by the current Preset setting by setting the required wanted amp unwanted protocol bands and various threshold sensitivities There are four protocol filter pairs which can be brought to bear on either EEG or 2ch EEG configurations In 1ch EEG all four pairs A1 A2 B1 B2 can be deployed to effect very complex protocols In 2ch EEG two pairs A amp B can be deployed to each chann
7. na EEG fail X O V X O V X O V X O V HEG OK HEG gain HEG signal HEG gain HEG signal HEG fail see signal validity tests below e 12 eeg channel operation at dead centre lower appears These dots advise in real time whether the two eeg electrodes are within offset voltage control range of about 1 7V Note that the actual voltage is displayed in Display Probes Thus the left dot represents the left electrode and so on A dot may extinguish if for example the electrode is not making good contact with the scalp The dot being extinguished means that the respective electrode may not be functioning correctly Checking Validity of EEG Signals The Pocket provides a number of tools to help ensure good performance of the electrodes e connect the EEG electrodes cable to the upper smaller connector on the unit Select Preset Setup EEG This will bring up the Probes display Observe the offset voltage in the centre top eeg channel 1 and centre bottom eeg channel 2 This voltage should be below 1 7 2 2V 17 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics e Observe the waveform on the Probes display Practice will enable the user to readily recognise valid EEG signals from noise and or mains hum e In most displays the default readout at the bottom of the display is of session variables When artefacts are detected the EEG health auto sensing will over write these sessio
8. non volatile memory and thus enable those parameter values to be recovered at any time by selecting the respective Preset User Preset value in the main menu Volume adjustment of the volume of binaural beat sequences and chime chord amp tone rewards Contrast adjustment of the LCD display contrast to compensate for temperature amp light conditions 4 lt 4 4 selecting this symbol will close the sub menu amp pass control back to the main menu Pushbutton Function The functions performed by the left and right pushbuttons varies depending on the Display chosen Actions can be initiated by short pushes long pushes gt 1 sec or dual pushes both left amp right pushbuttons This is summarised below Left Both Right Display Short Long Short Long Short Long Menu scroll scroll nil nil select shutdown display Most freeze Binaural beat log cycle ProtA B session menu amp displays display pure sine current displays variable toggle shutdown bauble session baseline HEG Trace timebase gt Log Display log cycle ProtA B session menu amp display 1m 10m current displays variable toggle shutdown toggle session baseline HEG amp init timer Log scroll scroll nil nil nil return to Record logged logged Trace Readout records records display with raw gt PC active rather than freezing the display the display is turned off this turns off any interfering si
9. or Preset Ich nIR HEG gt PC or select Mode and then choose 1 2 channel operation in the More submenu Select Go The default is Display Trace which gives a minute or 10 minute history of the HEG signal After 15 seconds or so to allow the HEG signal ie blood oxygenation level or infrared temperature to stabilise momentarily press the right button to baseline the HEG signal The HEG signal will adjust to the lower half of the Trace display allowing room for training to move the signal to the upper half of the display Also note that momentarily pressing the right button starts a timer displayed in the top left of the display HEG training is typically conducted sessions and the duration of the session 1 9 minutes is set in the Sequencer submenu as the duration of the first segment Session duration might typically be set to 3 minutes When it times out the timer initiates a short audible alarm this can be used as a prompt to log session variables Momentarily pressing the left button will toggle between a 1 minute history display the default and the 10 minute history display The default feedback is the continuous tone and the training objective is to increase it s pitch and to sustain this as long as possible Alternative audible feedback tones can be selected For Binaural Beat sessions only headphones are required electrodes amp HEG headset are not required Select Preset Binaural Beat and then Go To select oth
10. this submenu will display the currently selected item of each list Selecting an item will activate rolling of the respective sub submenu list Ich Ich pIR Headset Noiseon ALCon BW 40Hz AntiPink On Lock On 2ch 1 nIR Headset Noise off ALC off BW 48Hz AntiPink Off Lock Off 1ch Bipolar 2ch nIR Headset BW 56Hz Test 50 60Hz Code Upload 1ch Ch1 Ch2 2ch Test 50 60Hz Code Upload roll sub submenu this function is usually set to 1ch ie 1 channel referential operation 2ch accepts signals from the Chl amp Ch2 electrodes Ch1 Ch2 accepts signals from the two channels then in software derives a single bipolar channel as Chl 2 In this mathematical operation the common reference signal is cancelled Code Upload is for updating the program code in the micro controller see Appendix 3 Test 50 60Hz mode sets the following e 50 60Hz deviner produces a continuous tone in the earphones proportional to the strength of 50 60Hz interfering signals used to find benign environment e the tone in the left earpiece is twice that in the right used to check orientation of earphones e 40 48 56 Hz anti aliasing filter replaced with a 62 5 Hz filter to allow the magnitude of the 50 60 Hz mains hum to be monitored in Probes or Frequency display e ALC is on and anti pinking filter is off HEG Headset 1ch 2ch roll submenu sets whether the current HEG headset is a one channel or two channel versi
11. values in each of the 2 4 channels with accumulators of reward hits over 3 minute epochs remembering the highest reward accumulation providing a target for future epochs Halleys EEG modes a game where the size of the bats which deflect the ball is determined by the ratio of the wanted to unwanted bands selected under Protocol for each of the four EEG channels The length of the top of the left bat is controlled by the wanted to unwanted band ratio for the front left probe and so on Binaural Beat All modes displays the state of the light amp sound functions as programmed under Sequencer Trace Log Trace displays recent history of the protocol outcome over minute 10 minutes toggled by momentarily pressing the left button 1 minute history means that the protocol outcome is sampled each 0 5sec and 10 minute history means that the outcome is sampled every 5 seconds Pressing the left button for greater than second will invoke the Log display this displays the previous 16 time stamped records of the session variables stored in non volatile memory Synchrony Synchrony display is accessible when synchrony condition is set all up amp down protocol filters set to the band over which the cross correlation will operate eg a a a a 0 a 0 a sets alpha synchrony whereby the cross correlation of the complex fourier coefficients within the band for each of chl and ch2 are calculated The magnitude of this cross correlation
12. Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Pocket A3 Wireless Trainer for EEG pIR amp niIR Technical Manual e Release 1 0 first release 1 July 2005 e Release 1 1 Howto upload new firmware using BioExplorer 17 July 2005 returns email address IMPORTANT NOTICE Minder Labs PL MAKES NO WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE beyond product defect warranties expressly given in the body of this document The User is responsible for determining whether this product is fit for a particular purpose IMPORTANT NOTICE This product is NOT FOR MEDICAL USE and is solely for PERSONAL USE Not for use by children Not for use by photosensitive epileptics The prospective user is advised that some individuals with sensitive nervous systems may have negative reactions to neurofeedback and or light amp sound training This can be the case even under professional guidance Reports of negative reactions are rare amp mostly anecdotal If headaches or discomfort arise cease use Prior to use READ USER MANUAL in its entirety particularly the Section on USER SAFETY Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Contents VEER VIEW 4 SARE TY ES 5 OPERATION E E E E E E ee 5 FEGSIGNAL QUALITY ASSURANGE EE EA
13. al rewards are issued when the instantaneous protocol outcome 15 greater than the smoothed protocol outcome but not decreasing in amplitude modulated by the duration since the previous reward The amount by which the instantaneous protocol outcome need exceed the smoothed value is under menu control see Thres A amp Thres B controls HEG mode For nIR HEG two light sources in the Red and Infrared bands respectively shine into the scalp and the strength of the scattered light is measured The ratio of these two signals is a measure of blood oxygenation This modality is a type of Near InfraRed Spectroscopy For pIR HEG the radiation from the brain in a particular infrared band is passively monitored has both 1 channel and 2 channel future headsets pIR uses a single channel headset In the More submenu there is a control to specify which headset is present either 1ch pIR or Ich nIR HEG or 2ch nIR HEG headsets Specifying which type of headset is present allows the unit s protocols and feedback to automatically adjust as the user changes between Ich amp 2ch operation for both EEG amp or Selecting Ich pIR or Ich nIR determines which of the two modalities is selected when 1ch standalone operation is chosen However both nIR and pIR channels both nIR channels in the case of a two channel headset are transmitted over the wireless link to the PC Two channel nIR ca
14. asing filter to allow clean bandwidth up to 40Hz for 50Hz mains countries Europe Asia and 45Hz for 60Hz mains countries North America Japan Each EEG channel has a true anti pinking filter which can be switched in or out Anti pinking filters compensate for the natural 1 f power spectrum response of eeg signals Protocol Quality Assurance Each EEG channel has individually programmable wanted reinforce and unwanted suppress bands 9 pre defined protocol bands delta thetal theta2 alpha betal beta2 beta3 gamma all nil selecting nil for either wanted or unwanted invokes amplitude rather than ratio training selecting nil for both up amp down training invokes the all stop filter bands are defined by 10tn order band pass filters ensuring fast response to changing EEG signals 6 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics e frequency domain displays are driven from 128 point Fast Fourier Transform which is 8 1 overlapped and windowed to improve response time User Safety Conduction of Electricity through EEG Electrodes To operate EEG systems require a low resistance path to the scalp Should these paths come into contact with lethal voltages serious injuries or death could result Safety is thus an imperative and MinderLabs com have adopted best practice in this area of design e battery operation e infrared external links to remove the possibility of PC failure amp dangerous v
15. aste on the site then add more paste to the site for bulk then apply the electrode filled to excess with paste Product Care amp Maintenance keys to long product life System Reset The Pocket is designed to reset itself in the event of incorrect operation It is possible however that on occasion the display will blank eg in the event of a lightning discharge Holding the right button for more than two seconds should shutdown the device and pressing the right button should restart it If this is not the case the Pocket can be reset by momentarily removing the batteries Rechargeable Battery Two sets of 2 x AA NiMH rechargeable batteries are supplied with the unit If the unit 15 in heavy demand and since the unit can operate continuously for up to 7 hours after recharge batteries can simply be swapped on a daily basis The second set of batteries should be placed in the trickle charger supplied If the Pocket unit is used only irregularly please remove the batteries from the unit prior to storage Shelf life for a fully charged battery is many weeks Battery management within the unit includes e upon switch on if the battery is below operating voltage threshold the unit will display the battery state then go directly to shutdown procedures e the startup and user guide phase the unit will automatically shutdown if start is not initiated within 5 minutes e if in menu mode the unit will automatically go to shutdown sh
16. asured in microVolts peak peak For correct operation this should be between 4 20uV A good EEG signal will show discernable wave shape without excessive fuzziness Excessive fuzziness will ususally be accompanied by an excessively large EEG signal and indicate that the electrodes are not in firm contact with the scalp A flat lined EEG will indicate excessive 50 60Hz interference Now the Pocket is ready for an EEG session and the preferred protocol can be selected by choosing a Preset or by manually adjusting the Protocol and Reward menus The training objective be it ratio training or amplitude training is to either increase or decrease the pitch of the tone or the frequency of the rewards Up training means that the pitch of the tone or frequency of rewards increases as the protocol outcome increases Down training means that the feedback falls as the protocol outcome increases The polarity of ratio training can equally be alternated by swapping the numerator and denominator protocol bands Further simply telling yourself that the training objective is either to increase or decrease the feedback switches the training objective For relaxation protocols it may be desirable to have as the training objective the reduction of the feedback whereas for focus protocols it may be desirable to increase the feedback For operation having placed the headset on the head and connected it to the Pocket select Preset pIR HEG
17. ated device used to inject light signals through the scalp to measure blood oxygenation Either a one channel or two channel future headset be provided More details on nIR are available here http www biocompresearch org heg_instructions htm pIR HEG uses a sophisticated infrared filter and accompanying thermocouple to measure the energy being radiated This signal is measured in degrees Fahrenheit or Celcius The Pocket is also a Binaural Beat generator Binaural Beat is the term used to describe a system whereby a tone presented to one ear is at a slightly different frequency to the tone presented to the alternate ear This difference or beat can promote relaxation amp release of tension To simplify the unit s operation a large number of Presets are pre programmed whilst still allowing users to override these Preset settings making the unit very flexible User defined settings may be saved as one of three User Presets EEG protocols HEG fine tuning audible feedback mechanisms and binaural beat sessions all may be programmed by the user The user may monitor progress both within a session by visible displays of recent history and from session to session by time amp date stamped records of session variables The Pocket can also act as a data acquisition device or Pod for PC based neurofeedback software such as BioExplorer and BioEra Communication with the PC is over a 2 4GHz wireless Port which can co
18. atio Training Beta2 Thetal Beta2 Thetal Bl B2 Up Training Betal 0 Betal 0 The software recognises that the protocol is duplicated and shall activate only the Al and filter pairs To select 2ch synchrony training set all 4 pairs of protocol filters to the same non zero band Synchrony is defined as the magnitude of the cross correlation coefficient of the complex fourier coefficients within the band selected Improvement rather than absolute value is rewarded Reward thresholds are auto adjusting with one of three time constants selected under menu control A choice of three time constants also applies to the instantaneous outcome of protocol filters allowing user control over the responsiveness of the unit Rewards are presented both via the LCD display and via an audio reward subsystem Audio rewards can be selected to be chimes chords or tones For the latter there are two variations firstly a continuous tone whereby the pitch is proportional to the current protocol outcome amp secondly a tone triggered by the reward subsystem the pitch of the tone being proportional to the difference between the current protocol outcome and the protocol outcome at the time the reward was triggered The audio reward system utilises a fuzzy logic inference engine to issue rewards This inference engine takes as inputs the instantaneous protocol outcome the smoothed protocol outcome and the duration since the previous reward was issued In gener
19. ecting this function with the right button will allow the left button to override the values selected by the current Preset setting Binaural Beat the EEG channels are turned off to save battery amp only sound functions are active the binaural beat function is disabled allowing all Reward options to be used EEG Binaural Beat with Binaural Beat system active EEG system audible rewards are restricted to Chimes only beat amp carrier freqeuncies determiend by EEG peak frequency Binaural Beat and EEG systems disabled HEG Binaural Beat system audible rewards are restricted to Chimes only 11 IR amp Red LED pulsing controlled by the Binaural Beat sequencer in the range 3 50Hz HEG EEG audible reward system allows multiple targets EMG artefact detection is disabled 11 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics e Display selecting this function with the right button will allow the left button to override the values selected by the current Preset setting Probes EEG modes time domain display of the signal on each EEG channel Frequency EEG modes frequency domain display of the signal on each EEG channel Mirror EEG modes left hemisphere right hemisphere display of the peak signal in each of seven protocol bands For 1ch EEG operation the single channel spectrum is displayed in both left amp right Targets HEG EEG modes bar graphs of actual and smoothed ratio
20. egment individually 0 9 minutes The sequencer will continue to cycle through the segments indefinitely unless a segment has a duration of 0 minutes upon which the sequencer will stop and pass control back to the main menu e 4 4 4 4 selecting this symbol will close the sub menu amp pass control back to the main menu Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics More Sub Menu 4 t Preset 4444 Mode EEG Mixe Display 4ch f Protocol Set Clock j Reward Set Alarm Seauence lserfPreset Reward Je lume a Contrast e More selecting this function pulls up a sub menu on the right side of the screen which has additional functions Wireless off raw gt PC raw lt RF protocol gt PC RF roll submenu activates the wireless 2 4GHz link raw gt PC transmits raw HEG EEG data to the PC raw lt RF allows the unit to act as a monitor receiving signals from other wireless Pendants or Pockets protocol gt PC transmits protocol outcomes to the PC whilst selecting RF ChX allows the RF channel to be scrolled thru RF1 RF8 Selecting RF ChX again will cause the display to flash whilst the Pocketw is transmitting commands to devices listening eg PC dongle to change to the newly selected channel Selecting RF ChX one more time will cause the Pocketw to begin transmitting on the newly selected channel Probes setup the following roll submenus are multiplexed onto the second item in the More submenu list Rolling through
21. el Protocol A amp B allows the user to set the required wanted up training amp unwanted down training protocol band 6 01 02 a B1 2 B3 y or 0 by rolling through the list with the left button and selecting with the right button Selecting 0 as the wanted or unwanted band will invoke amplitude training of the band selected in the paired unwanted or wanted band Selecting a non 0 band for each of wanted and unwanted will invoke ratio training Selecting 0 for both will invoke the all stop protocol Gain adjusts the sensitivity of reward system to the HEG signal For example increased Gain will increase the change in pitch of the feedback Tone as the HEG signal changes Thres A HEG Offset Thres A adjusts the fuzzy logic output threshold a low value will allow rewards to be generated more easily HEG Offset translates the HEG signal to a range in which the reward system can operate effectively This is adjusted by listening to the feedback Tone whilst adjusting the value until the Tone is at a pleasant pitch Thres B adjusts the fuzzy logic output threshold a low value will allow rewards to be generated more easily Smoothing selects one of three time constants to smooth the instantaneous protocol outcome and one of three longer time constants to apply to the long term smoothed protocol threshold When in HEG modes it also effects a choice of three time constants to be applied to the HEG signal 1 is the
22. er pre defined Binaural Beat sessions choose other Presets then change to Mode Binaural Beat Then Go To define your own Binaural Beat session go the Sequence submenu and program each of the eight segments To save User defined sessions either Binaural Beat sequences or HEG EEG protocol configurations once having set the preferred parameters go to More UserPreset1 2 3 and select This User defined configuration will be stored and subsequently be accessible via Preset User1 2 3 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Menu Screens Main Menu re Preset Users Mode EEG BBeat Display EEG Lo Protocol Reward Chime Sequence Beat 50050000 EEG Mixe The left pushbutton is for scrolling rolling between menu options The right pushbutton is for selection of menu options The left hand side of the menu screen lists the main menu functions The right hand side of the menu display shows the current setting for that function For example in the figure above the function Reward is currently configured as Chimes However when More is selected more functions appear on the right hand side of the menu screen Some menu functions roll that is the different options available cycle in situ whilst other functions when selected open a scroll list on the right side of the menu screen e Preset predetermined system configurations which can be over
23. erred to as EEG in this document and HEG biofeedback EEG biofeedback refers to the method of using electrical signals generated by the brain to train the brain s response to stimuli HEG biofeedback feedback a measure of brain metabolism There are two types supported by the instrument nIR HEG near infrared HEG uses a measure of the oxygenation of blood flow in the brain to train the brain to elevate these levels pIR HEG passive infrared HEG uses a measure of the energy radiated by the brain in a particular infrared band and seeks to increase this energy EEG Biofeedback uses one or two channels as does nIR HEG whilst pIR HEG is a single channel All three modes can be operated concurrently For EEG biofeedback protocols allow for a range of synchrony amp up training down training amp ratio protocols independently set for each channel The unit is supplied with a set of pure silver electrodes The electrode set comprises earclip electrodes for neutral amp reference electrodes and conventional cup electrodes for the Activel and Active2 electrodes For one channel operation the Active2 electrode is not used One channel bipolar montage is also possible with the bipolar signal being the difference between the Activel and Active2 electrodes An adaptor for industry standard touch proof electrode sets is also available For HEG biofeedback a special HEG headset is supplied as an optional extra The nIR HEG headset is a sophistic
24. gnals around 40Hz that can be produced by the display Displays Selecting main menu list item Display will enable a rolling sub menu of the various displays available Note that e cycling through displays is activated by depressing both pushbuttons and holding for greater than one second 16 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics e short press of the left button will freeze the display A second short press will release the freeze e along press of the left button will cycle through options for the binaural beat tone pure sine waves or a baubling effect EEG Displays m log gt d i 0e 172 The display depicted here is Display Mirror and is typical of the displays The following are features common to most or all displays e Inthe lower right of the display you will see either prA B or A amp B emg indicating whether Protocol A or B or both session variables are being displayed emg is displayed only when in Test amp Display Frequency only When wireless is on this display will alternate with the wireless RF channel number eg rf1 e Inthe upper right of the display the screen magnification 1x 2x 4x or 8x for time domain displays and 2x 4x 8x 16x 32x or 64x for frequency domain displays will be displayed Screen magnification is the autoranging of the unit to improve the resolution of the display If as usual Aut
25. ht protocol filter pairs are active together with left right audible rewards Reward threshold is under the control of Thres A Audible rewards are as follows e Chimes 1 rewards presented to left ear A2 B2 presented to right ear e Chords satisfying one filter pair produces base tone satsfying two produces chord e Tones 1 rewards presented to left ear A2 B2 presented to right ear e Al A2 amp BI B2 separate A amp protocols with separate thresholds ThresA amp ThresB Audible rewards are as follows e Chimes 1 2 rewards are stereo hi pitch B1 B2 are stereo lo pitch e Chords satisfying one filter pair produces base tone satsfying two produces chord e Tones 1 2 rewards presented to left ear B1 B2 presented to right ear future stereo e Al 2 B2 four separate filter pairs with separate A amp protocols under the control of separate thresholds ThresA amp ThresB Audible rewards are as follows 13 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics e Chimes hi pitch amp lo pitch rewards are presented to left ear 2 hi pitch amp B2 lo pitch are presented to the right e Chords simultaneously satisfying succesive filter pairs produces successively higher complexity chords e Tones either Al or A2 rewards presented to left ear amp either 1 or B2 presented to right ear toggling between the two with the right pushbutton future stereo e Sequence selecting
26. ion EEG2 EEG1 EMG1I EMG for headset HEG2 HEG1 To communicate with a PC connect the wireless dongle and configure the virtual COM port assigned to the dongle s driver at installation for 38 400 Baud 8 bit even parity one stop bit PC based applications utilise this capability to do all or some of e Receive raw eeg heg data acquired by the Pocket for processing by neurofeedback protocols on the PC Receive emg artefact signal 100 200Hz from the Pocket EEG mode only Extend the range of neurofeedback Rewards and eeg data displays using the PC s multimedia capability Uploading new firmware upgrades to the Pocket Upload logged data from a unit and store in a client database future See website for updated details on 3ra party PC applications which support this interface and for instructions on uploading new firmware for the Pocket Currently PC aaplications supported are BioExplorer www cyberevolution com and BioEra http bioera sourceforge net index html Appendix 1 Managing the wireless link 2 4GHz wireless communication utilises the serial USB wireless dongle pictured Similar to USBserial adaptor cables the dongle requires a Windows driver to be installed The driver and installation instructions can be found here http www Pocket Neurobics com windows htm The 2 4Ghz band is shared with Bluetooth some wireless LANs microwave ovens and some video and sound surveillance systems To help pre
27. n also use the Ch1 Ch2 or bipolar mode used by EEG the protocol outcome is the difference between the two signals nominally the left amp right channels And indeed one could also choose the difference between nIR amp pIR channels as the protocol outcome The nIR HEG signal is set for a nominal value of 100 although this is depends on the placement of the headset with changes in locale causing variations of typically 20 30 around this value Changes during a training Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics session can vary from 5 to about 15 pIR HEG is reported in degrees Fahrenheit with a nominal value of 98 degrees Variations thru training of 0 5 to 1 0 in the pIR HEG signal can be expected Since these variations in the HEG signal are relatively small the approach adopted is to baseline the HEG signal once it is stable then feedback the variations from this baseline In most displays a momentarily pressing the right button will initiate this baselining action and the feedback signals will then automatically be in the correct operation range If at any time the HEG signal drifts out of range momentarily pressing the right button will re baseline the signal There are also some optional manual adjustments available in the menus HEG Offset amp HEG Gain Let s say that the HEG signal has an instantaneous value of 85 This value of 85 appears at the bottom of the screen Fo
28. n variables with the following warnings e no signal probably flatlined thru excessive 50 60Hz e XXXX excessive signal electrode probably fallen off e emg artefact probably muscle eye artefact e VVVV electrode offset potential range exceeded Logging data Session variables can be logged at any time by momentarily pressing both buttons A record the Pocket can remember the previous 16 loggings consists of time amp date when the unit was most recently switched on the duration since that start time the number of HEG EEG channels active the A amp B protocols in force and the session variables associated with each protocol The session variables logged have been averaged across the session The averaging process involves the following steps e During the fist 15 seconds after leaving the menu by selecting Go various smoothing time constants are forced to their minimum value to speed settling time At 15 seconds smoothed session variables are set to the current unsmoothed or instantaneous value e Session variables are subsequently averaged at 15 second intervals thus the first averaged value is available 30 seconds after leaving the menu e After 64 minutes averaging stops and any subsequent logging shall store the values as they are at the 64 minute mark Note that this averaging process is recommenced every time the menu is exited So to access displays other than the current display without rese
29. ncurrently stream four data channels to a serial USB wireless dongle supplied with your unit These data streams can be raw EEG data or processed data called outcomes ie the output of filtering on the Pocket I The Pocket broadcasts protocol outcome packets to future wireless enabled feedback devices It requires installation of a Windows driver to support the serial USB wireless dongle The driver and installation instructions are available here http www Pocket Neurobics com windows htm The Pocket includes a number of other features including e Automatic detection of artefact signals including e EMG muscle artefact detection in the band 100 to 200Hz e electrode offset voltage detection e EEG low signal detection excessive 50 60Hz interference e EEG excessive signal detection likely displacement of EEG electrode e Test mode to seek out benign 50 60Hz environments Ability to inject randomised noise as a pseudo EEG or pseudo HEG signal for blind studies or for demonstration purposes Selectable Automatic Level Control on the EEG amp HEG signals amp auto scaling of displays Selectable anti pinking filter for flattening the spectrum of EEG signals real time alarm clock timer shut down power up 2 x AA NiMH rechargeable battery with 7 hours continuous firmware reprogrammable by downloading a file over the net Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Safet
30. nd for the major lobes of the brain frontal central parietal occipital and temporal respectively whereas the numeric subscripts describe a location on the lobe with odd numbers on the left hemisphere and even numbers on the right Note that a subscript of z denotes the midline point For a single active probe ie 1 channel referential montage the most commonly used point for the active electrode 15 Cz with the reference on one or both ears For two active electrodes the most common points are C3 and C4 with a reference at the ears or on the mid line For four active electrodes there are not any standard locales For bipolar montage a common placement is C3 C4 ie an interhemispheric montage In a clinical environment it would be common for the electrodes to be relocated from time to time during a session with specific regimens to treat specific conditions 20
31. oltages conducted via wires e double insulated EEG cable to prevent the cable to the head finding exposed dangerous voltages e EEG currents between the unit and the user are strictly limited in accordance with international standard IEC601 ENSURE THAT THE UNIT IS OPERATED IN SAFE RESIDENTIAL OR OFFICE ENVIRONMENTS DO NOT USE IN INDUSTRIAL OR HOSPITAL ENVIRONMENTS CONNECT EEG CABLE POCKET I UNIT ONLY DO NOT COONECT TO ANY OTHER DEVICE OR CONNECTOR Infection Risk Traditional approaches to the placement of EEG electrodes on the scalp involve abraiding the skin to reduce electrode scalp impedance less than 5K ohms is traditionally recommended Breaking the skin creates the risk of infection from blood born pathogens such as HIV Hepatitis C and Creutzfeldt Jakob disease Although there have been no reported cases of such infections resulting from EEG sessions the U S Centre for Disease Control has issued guidelines recommending that electrodes be sterilised prior to re use With modern instrumentation amplifiers as used in the Pocket I an electrode scalp impedance of less than 5K ohms is not necessary Values less than 40K ohms are quite serviceable It is therefore recommended that skin not be abraided Both cup electrode and saline solution electrodes can perform satisfactorily without abrasive skin preparation When using conductive electrode paste amp metallic cup electrodes the recommended procedure is to first rub conductive p
32. omatic Level Control ALC is on alternating at a 1 second rate with the screen magnification will be the channel gain eg 15 6k x With ALC off channel gain is fixed at 20 0k x and is not displayed With ALC on channel gain can range from 10 0k x 40 0k x depending on the strength of the eeg signal e In the lower left corner log will be displayed when both pushbuttons are pressed The screen will also momentarily freeze as data is written to non volatile memory Session Variables These numbers at the lower centre of the screen are the Protocol A and Protocol B session measures e reward percentage of time that the inference engine is issuing a reward e protocol outcome smoothed value of output of the protocol filters either a ratio up training energy or down training energy depending on the protocol settings This value can be logged e protocol outcome variance square of the difference between protocol outcome and the long term averaged protocol outcome smoothed This value can be logged e In operation the session variables e gain percentage value is greater than baselined valued This value can be logged e value a measure of blood oxygenation nominally a value of 100 0 This value can be logged Left Front 1 or A Right Back A2 B2 or B EEG OK reward outcome variance reward outcome variance SynchronyOK reward correl coeff na
33. on off roll sub submenu eeg signals have natural roll off in energy as their frequency increases this gradual roll off in energy with increasing frequency is called pinking in reference to the numerous natural phenomenon which exhibit this characteristic To flatten the spectrum of the EEG signal allowing the protocols to work more effectively a compensating filter can be inserted This anti pinking filter should normally be on when the Pocket is used standalone and off when used as a pod with a PC biofeedback application e Lock on off roll submenu when set the lock limits access to User Presets only amp inhibits access to menus which modify protocols Set Clock allows programming of hours 0 23 minutes day month year for use in time stamping logged values and to allow power up amp power down by setting a time of day alarm Set Alarm allows programming of a time of day alarm hours 0 23 minutes Once Set Alarm is selected during the subsequent 24 hours a match between the Set Alarm time and the current real time clock will cause the unit to power down if currently operating or cause the unit to turn itself on and resume operation with the previous parameter settings if the unit is off at the time of the alarm User 1 2 3 Preset roll submenu selecting this function will allow rolling between User 1 2 3 preset programming Selection of one will cause the unit s current parameters to be stored in
34. on When HEG Ich is selected setting Mode EEG HEG and setting the electrodes configuration to 2ch will mean operation is two channel EEG and one channel HEG ALC on ALC off roll sub submenu this function switches on or off the automatic level control ALC function Whilst off the gain of each EEG channels is fixed at 20 000 times V V Whilst on the ALC will vary the gain between 10 000x 40 000x effectively increasing the dynamic range of the EEG signal from 10 bit to 12 bit resolution The gain of Channel amp 2 will be set by the channel with the larger 15 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics signal ie a common gain setting for the two channels Channel gain is updated approximately eight times per second ALC allows the protocols to work more effectively amp should normally be on e Noise on off roll sub menu when on the HEG EEG inputs are replaced with a randomised noise signal This can be used for blind testing or for demonstrating the function of the unit without having to wire subjects e EEG Bandwidth 40 48 56 Hz roll sub submenu should normally be set to 40Hz When the unit is used as a front end for PC based neurofeedback programs and in countries with 60Hz mains supply North America Japan the PC program can shutdown the unit s display and set 48Hz bandwidth Note that the LCD display circuits produce interference at about 45Hz sometimes lower e Anti Pinking Filter
35. ond However those beat frequencies adjacent to the current peak signal in the EEG filtered by the anti pinking filter will be substituted by a beat frequency The carrier frequency used to generate the beat frequencies is determined by location of the peak frequency of the EEG unless the EEG signal is determined to be artefacted then the carrier frequency is controlled by the tone selections of the Binaural Beat Sequencer In HEG EEG mode HEG amp EEG operate concurrently In this instance EMG detection on the EEG signals is disabled In this mode as well as two channels of EEG there are two channels of HEG sent over the wireless link to the PC either one channel of nIR and one channel of pIR or two channels of nIR HEG if 2ch nIR headset is selected EEG Signal Quality Assurance Each of the EEG channels uses a high quality instrumentation amplifier to reject noise and 50 60Hz hum A driven right leg circuit reduces 50 60Hz hum further whilst ensuring currents through the electrodes are at safe levels A Test 50 60Hz mode produces a tone the pitch of which is proportional to the amplitude of the 50 60Hz interference this can be used to quickly identify poor locales and benign locales The unit constantly monitors the potential across the electrode scalp interface to ensure the amplifier is not saturated This status information is available in most displays Each EEG channel has a high quality 8 order elliptic anti ali
36. orer then select BioExplorer in the menu Bar then Devices 19 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics 4 If there is not already a Pendant EEG driver listed select Add Pendant EEG OK Choose the Port to which the wireless Dongle is connected Your Pocket Al or Pocket driver will already be looking at this particular COM port Finally select OK 5 In the BE Device Manager window untick all drivers except the Pendant EEG driver to ensure that it has precedence in connecting to the wireless dongle 6 Highlight the Pendant EEG driver by left clicking on it with the mouse then select Properties then the Pendant tab 7 Select Upload Firmware and choose the file earlier downloaded into a temporary directory Clicking Open will cause the file to begin uploading to the Pocket over the wireless link You should see the firmware s data scolling in the window as it is transferrd This process takes about 2 minutes 8 If the file is successfully received by the Pocket it will automatically reboot and display the new firmware version at startup If the transfer was corrupted then the Pocket will stay Searching ready for a new attempt to upload the firmware To try again simply Open the firmware file once more Appendix 3 Procedure to place Electrodes and the 10 20 system To measure a brainwave signal the electrodes can either be in pairs with the difference in voltage between the two
37. ould no buttons are pressed within 1 minute e ifin normal operating modes the unit will automatically go to shutdown if no buttons are pressed within 2 hours 15 min e inmost displays bat will commence to flash approximately 15 minutes before the shutdown threshold is reached at which time the unit will automatically go to shutdown 7 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics LCD Display Sensitivity The LCD display is sensitive to liquids on its surface It can cause failure to parts of the display area Static Discharges The Pocket is electrically isolated and static discharges should not be a problem Nevertheless in static prone areas cold and or low humidity we recommend that prior to use the user ground him herself This can be achieved by touching exposed metallic parts of computers or whitegoods Warranty The Pocket unit is warranted against electrical failure for 30 days from date of purchase see exceptions below If within this 30 day period the unit ceases to function with it not having experienced physical damage to the case it may be returned to the factory for free repair or replacement do NOT return electrodes or charger For details on shipping please email support Pocket Neurobics com Shipping costs to the factory are the responsibility of the user typically about US 30 Pocket Neurobics shall repair or replace the unit and pay for return shipment The unit is not warranted against ab
38. p B1 Bz2 separate A amp protocols with separate thresholds ThresA amp ThresB Audible rewards are as follows e Chimes 1 2 rewards are stereo hi pitch 1 2 are stereo lo pitch e Chords satisfying one filter pair produces base tone satsfying two produces chord e Tones 1 2 rewards presented to left ear B1 B2 presented to right ear future stereo e Al 2 B2 four separate filter pairs with separate amp protocols under the control of separate thresholds ThresA amp ThresB Audible rewards are as follows e Chimes Al reward presented to left ear A2 to the right B1 is stereo hi pitch amp B2 is stereo lo pitch e Chords simultaneously satisfying succesive filter pairs produces successively higher complexity chords e Tones either Al or A2 rewards presented to left ear amp either 1 or B2 presented to right ear toggling between the two with the right pushbutton future stereo 2ch operation Left Right Al A2 Bl B2 e Al A2 A3 A4 separate left right protocol filter pairs are active together with left right audible rewards Reward threshold is under the control of Thres A Audible rewards are as follows e Chimes 1 rewards presented to left ear A2 B2 presented to right ear e Chords satisfying one filter pair produces base tone satsfying two produces chord e Tones 1 rewards presented to left ear A2 B2 presented to right ear e Al B1 amp A2 B2 separate left rig
39. r purposes of providing a very sensitive feedback signal the HEG Offset is subtracted from the value of 85 to bring it to a value around 0 10 HEG Gain is then applied as a multiplicative factor A HEG Gain setting of 0 will multiply the resultant by 0 Gain setting of 99 will multiply the resultant with a number four times that of the menu s nominal value of 25 HEG uses the same audible reward subsystem as EEG a choice of chimes chords or tones Binaural Beat mode generates pure sine waves and background pink noise according to an 8 segment sequencer each segment with programmable tones beat frequency left right volume pink noise volume and duration Each preset has an individually user programmable tone and beat frequency to supplement 9 pre configured values Mixed modes the Binaural Beat system can run concurrently with the EEG or HEG systems In this instance however audible rewards are limited to Chimes Chords amp the continuously variable pitch tone is not available In HEG Binaural Beat mode the flash rate of the HEG IR amp Red LEDs is controlled by the binaural beat sequencer whereas in HEG mode the flash rate is fixed at 40Hz and in HEG EEG mode the flash rate is fixed at 50 2 In EEG Binaural Beat mode the beat frequencies generated a randomised selection between the preset beats of 0 7 14 21 28 35 42 49 Hz changing from one beat frequency to another at the rate of 4 times per sec
40. ridden by adjusting individual parameters Once the preset has been selected simply use the left button to scroll down to Go and then hit the right button to action Binaural Beat Binaural beat only EEG HEG disabled EEG driven Binaural Beat randomised beat frequencies except no beats in vicinity of current EEG peak frequency and the carrier tone is modulated by the current EEG peak frequency Test 50 60Hz with electrodes connected can be used to find an enviroment relatively free form 50 60Hz interference also displays emg signal in Display Frequency as Prot B SMR Ich Ich EEG up SMR down Theta continuous Tone reward Quash Ich wideband suppression Alpha Sync 2ch trains up magnitude of alpha synchrony across 2 channels Alpha Theta Ich Ich EEG with multiple targets up Theta2 down Delta AND up Theta2 down Beta3 Chord reward allows multiple targets Alpha Ich EEG up Alpha continuous Tone reward nIR pIR EEG gt PC transmits 2ch EEG Ich nIR and Ich pIR to PC pIR HEG gt PC Ich pIR transmitted to PC nIR HEG gt PC Ich nIR tramitted to PC Ich EEG gt PC transmits single eeg channel to PC non pinking filter no applied 2h EEG gt PC transmits two eeg channel to non pinking filter no applied User 1 user defined preset User 2 user defined preset User 3 user defined preset e Mode how the EEG HEG amp Binaural Beat systems relate to each other Sel
41. s of the unit for the first time it is recommended that this manual be read in its entirety If the unit is received with batteries removed remove the battery cover from the back of the unit and install the 2 x AA size NiMH rechargeable batteries supplied Ensure battery polarities are correct Simply pressing the right hand button for a few seconds will cause the LCD display to show a logo then date amp time battery state and Start To go to the menu display press the right pushbutton If this button is not pushed within a few seconds a User Guide indicating the function of buttons and connectors will cycle for 5 minutes If the start button is not pushed during this period the unit will automatically power down 2 r A a 03 43 23 11 Start F Dattero F O Turning off the unit is achieved by depressing the right button until the shutdown screen appears asking whether not you wish to log protocol values If not answered within 5 seconds values are not logged amp the unit powers down Menu selections are identified in this manual by bold typeface A train of menu selections are separated by Rub conductive paste onto the scalp then add more paste to the site for bulk Fill the cup electrode to excess Affix the electrodes to the scalp the Neutral amp Reference earclips to be affixed to the earlobes and the Active 1 to Cz 1 channel operation Active 2 left floating or Active 1
42. shortest time constant and 3 is the longest time constant 12 Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics e Artefact conventional threshold used to detect presence of emg artefacts EMG signals are measured in the band 80 200Hz e Reward selecting this function with the right button will allow the left button to override the values selected by the current Preset setting by rolling through the following options for protocol settings when EEG modes are active Whilst in Binaural Beat mode audible rewards are disabled and whilst in combined EEG Binaural beat or HEG Binaural Beat modes only Chime rewards are available Chords amp Tones are inhibited There are four protocol filter pairs 1ch or Ch1 Ch2 operation Al A2 Bl B2 e Al A2 A3 A4 a single protocol filter pair is active together with a single audible reward Reward threshold is under the control of Thres A Audible rewards are as follows e Chimes Al reward is stereo e Chords satisfying Al produces base tone e Tones Al rewards is stereo continuously variable pitch e Al BI1 amp 2 B2 two separate protocols with a single threshold control of ThresA Audible rewards are as follows e Chimes 1 rewards presented to left ear A2 B2 presented to right ear e Chords satisfying one filter pair produces base tone satsfying two produces chord e Tones 1 rewards presented to left ear A2 B2 presented to right ear e Al A2 am
43. this function allows overriding binaural beat parameter values set by the current Preset setting Selecting this function brings up a sub menu on the right side of the screen In this sub menu sequencer functions can be scrolled with each function having eight individually programmable segments The functions selectable in the submenu are e Tone for binaural beat operation two tones separated in frequency by the beat frequency are generated This function sets the mean frequency of the two binaural beat tones One of nine frequencies can be selected for each segment individually e 0 73 6 Hz e 1 110 Hz e 2 165 Hz e 3 197Hz e 4 246 Hz e 5 393 Hz e 6 440 Hz e 7 492 Hz e 8 526 Hz e U User defined 000 0 999 9Hz defined in the first 4 segments in last line of the sub menu e Beat selects the frequency separation of the two binaural beat tones for each segment individually e 0 0 Hz no beat frequency e 1 234 Hz 0l 4 389 Hz e 02 6 583 Hz e a 9 875 Hz e BI 13 17 Hz e f2 19 75 Hz e B3 26 33 Hz e y 39 50 Hz e U User defined 00 0 99 9Hz defined in the last 3 segments of the last line of the sub menu Volume Left programmes the volume in the left audio channel for each segment individually Volume Right programmes the volume in the right audio channel for each segment individually Mask programmes the volume of the background pink noise for each segment individually Time programmes the duration of each s
44. tting the averaging process press both buttons for greater than 1 second to initiate scrolling between displays without entering the menus Also note that the session time recorded in the log record measured in minutes is the time since the unit was last powered up and is not the time since the menu was last exited Support Functions Set Clock At the time of power up of the unit the time amp date is displayed and if observed to be in error selecting More Set Clock will bring up a small sub menu to enable updating the date amp time The format is hours 0 23 minutes day month year Set Alarm A match between the time of day alarm setting and the Clock will switch the unit off if it is currently on and switch the unit on if it is currently off This will not recur Thus the Alarm needs to be reset each time the alarm function is required If it is desired to say use the light amp sound in bed prior to going to sleep selecting More Set Alarm will allow automatic shutdown of the unit at a time of the user s choosing Alternatively if you wish to wakeup to a selected Preset or configuration selecting that configuration setting the time of day alarm then turning the unit off will cause the unit to turn on upon time of day alarm and go directly to the most recent configuration and then automatically Wireless Link The Pocket transmits 4 channels of data over the IR or 2 4GHz wireless link the
45. use nor against e failure of the battery e partial failure of LCD display area invariably due to liquids coming into contact with the LCD screen whilst e operational e failure of EEG electrodes Replacement battery units can be obtained from local electronics stores such as Tandy Replacement electrodes can be ordered from e stores such as www rochestermed com Note that silver or tin electrodes are recommended Gold electrodes should not be used since wear or scratching thru to the base metal can cause excessive offset voltages and flatlining of the EEG signal For units which fail whilst out of warranty and not having suffered physical damage a service fee of US 100 for repair or replacement shall be applicable Packing List Pocket with rechargeable battery v pIR and or nIR Headband Optional EEG electrodes User suppplied EEG electrode conductive paste User suppplied Behind the head headphones v USB wireless dongle AA NiMH battery charger v User Manual v Windows driver for Wireless dongle Pocketw Accompanying CD or Download from www Pocket Neurobics com windows htm Pocket A3 Technical Manual Rel 1 1 Pocket Neurobics Connectors Headphones Scroll Button Start Select lt Button pIR EEG Connector 4 HEG ai l To i M L i First Use Before using the HEG EEG function
46. vent interference and to allow multiple devices to operate in close proximity eight RF channels are provided The RF channel can be selected in the More submenu With the wireless link active the RF channel number is flashed in the lower right corner of most displays The dongle too can operate on each of each channels and this can be set either manually by pressing the button the number of times to set the respective channel eg twice for channel 2 etc or automatically by changing the channel on the Pocketw The LED on the dongle will periodocally flash to indicate the current rf channel eg it will periodically flash twice to indicate channel 2 Also if no raw signals are being received perhaps the Pocket_I is off the LED will be mostly off and will flash on If the dongle is receiving a signal then the LED will be mostly on and will flash off Appendix 2 Uploading new Firmware versions to the Pocket Steps to Upload new Firmware version to the Pocket over the wireless link 1 Download new firmware file from here and store in a temporarydirectory on you computer http www pocket neurobics com upgrade htm Look in the section for the Pocket 2 the Pocket go to the More submenu second line double right click on which probably says Ich 2ch then scroll using left button till you reach Code Upload Right click The Pocket will display Searching and is now ready to receive the new firmware 3 Run BioExpl
47. y Rechargeable battery operation e Infrared ie non metallic links to other units PC Abh e Double insulated EEG probe leads e Currents through EEG electrodes compliant with IEC601 standards Modes of Operation EEG mode 1 or 2 channels of eeg with referential or bipolar montage with protocols set on each channel individually There are a total of four pairs of filters which can be used to implement a variety of protocols The first filter of the filter pair is used for up training the second for down training and when both filters of the pair are selected the ratio of the output of the two filters is trained In this document these three types of training regime are generically referred to as protocol outcomes For single EEG channel operation including single channel Bipolar montage all four pairs of filters can be brought to bear on the EEG signal to implement quite sophisticated protocols These filter pairs are referred to as Al A2 1 amp B2 For two EEG channel operation each EEG channel has two pairs of filters that can be applied In this case the filter pair designations for each eeg channel are Protocol A and Protocol B Note that not all filter pairs need be active and the relationship between the filter pairs and the feedback signals varies base don wheterh one or two channel operation is selected This is best illustrated with an example a single EEG channel protocol can be defined in the menus thus Al A2 R
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