BioExplorer EMG Design Suite

The designs in this suite are simple in conception - they are based on a single channel of EMG (electromyography) data, for muscle tension biofeedback. I use them in my own practice with basic stress-related placements of the electrodes: wrist to wrist and frontalis (forehead). (Note that some of the designs in the breathing suite also monitor EMG, and are much better suited for feedback of muscle tension related to breathing (such as measured from the scalene or trapezius mucles.)

The designs have the following button-switchable control options:

• Filter bandwidth: can be set to narrow (100-200 Hz) or wide (10-400 Hz) - the former is the more typical.
• Length of averaging of EMG amplitude: can be set to long or short. By default these are 1.0 S and 0.125 S respectively.

Graphical Feedback Features

• Oscilloscope with threshold control (note the threshold also controls audio feedback)
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• Long term trend
• Spectral Analysis of the raw EMG signal

Audio Feedback Features

Each audio feedback option can be switched on and off using a button.

• Tone, midi or continuous midi
• Threhold control can be applied to the above, so that the sound switches on and off as the threshold is crossed.

Sample Screenshots

Click on the thumbnail to see the full-scale image.

1. EMG Design This session was recorded from a scalene / trapezius placement. The oscillations you can see in the 10 minute trend are related to breathing.

For further information see the User Guide for the breathing designs. This can be downloaded for free. Visit the downloads page by clicking the link in the navigation menu.

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