Jan-30 SOP Delsys Trigno system PDF

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lecture notes for HAT...

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RECORDING SURFACE EMG USING DELSYS TRIGNO SYSTEM DAVID. M. ROUFFET, PH.D. THURSDAY JAN 30, 2020

AVANTI SENSORS ALLOCATION FOR RECORDINGS  Check that all the Avanti EMG sensors are charged and ready for use (green light = fully charged; yellow light =

partially charged; red light: low charge). We have a total of 16 Avanti sensors which include EMG electrodes + 3 accelerometers (x,y,z).  Start EMGworks Acquisition software version 4.7.3 (shortcut on the desktop)  Go to the Test configuration manager section and select “EXP-607” configuration where the 16 sensors have

been allocated to 16 channels.  In the “Existing Sensor” menu Allocate each muscle you want to record from to a specific channel. To do that,

drag, the existing sensor to the muscle location on the body.

DEFINITION OF SIGNALS DISPLAY DURING RECORDINGS  In the configuration tab, click on the Experiment Workflow (see menu on the left side of the screen).  Go to the workflow templates to display the signals you will record during your assessment.  Through the plot and store template: 



Under the Task Specific menu: 

Determine the duration of your recordings (Run Time)



Select the muscles you will display signals from. Go to the options menu of each muscle to determine which specific data you choose to plot: raw EMG, accelerations (x,y,z), EMGrms.

Under the General menu: 

Specify general parameters associated with recordings.

SKIN PREPARATION

 Visually identify muscle location using the diagram provided by EMGworks Acquisition software (allocation of

existing sensors).You can switch between anterior and posterior views using the drop down menu at the top right part of the screen.  Manually palpate muscle belly to define electrodes placement  Shave skin around target electrode positioning using razors (5x5cm)  Clean skin using alcohol swabs on shaved area

ACTIVATING + POSITIONING + SECURING THE AVANTI SENSORS

 Put double-sided tape on each EMG sensor.  Remove the sensors from the charging station and press on the small button next to the arrow in order to start

the sensors.You should see a yellow flashing light.  Secure the sensors on the participant’s skin so that the long axis of the sensor aligns with the orientation of the

muscle fibers (based on pennation angle).  Make sure that the sensors will not come off as the participant performs the requested movements.

SETTING UP THE RECORDINGS

 Once all the sensors are on, positioned and secured, press Start Test at the bottom right part of the screen.  In the Test run Name pop-up window, define a file name so that you can associate a specific file with a specific

condition you recorded.You will also need to define the target folder for acquired data where your file(s) will be stored. Use the Browse button to determine this folder. Each student will need to create her/his own folder where she/he will store all the files associated with the HAT. Students folders will need to be located under Documents\EXP-607_2020.This is VERY IMPORTANT.

PLOT AND STORE

 Takes you to the visualization screen where all the signals you have selected will be displayed.  Press the start button at the bottom left of the screen to start a recording.  A configuration check pop-up window will appear so you can verify that all the sensors you want to record from

powered and connected.You need to see a green light next to each sensor you want to use.  The recording will automatically stop after the end of the time reach the duration you set in the plot and

store\task specific menu. After the end of each recording, a file is generated in the folder you specified.You can press start again and a new file will be recorded and stored using an incremental name.

VISUALIZATION OF EMG SIGNALS

 Right click on y-axis and select either:  

Auto zoom Y. Enter zoom level (specify min and max values in µV)...