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Science

Testing surface EMG positions

Today tested some potentially interesting locations for surface EMG. For each you’ll find a video below. Note that only the lower MATLAB frequency plot is informative:

  • Flexors of fingers
  • Flexor of thumb
  • Biceps
  • Contractor of forehead (surprise expression)

All seemed quite specific to the intended muscle (group). Of great help was this website with suggested electrode locations. Especially extending the thumb and frowning seemed to result in very responsive measurements. As a next step it would be interesting to try to make a control signal based on the differences between extensor and flexor and see if it would be robust and if it results in an informative signal.