Surface EMG, biceps, electrode 'scope'

Philippe Lebrun plebrun at minf.vub.ac.be
Mon Mar 15 04:23:35 EST 1993


In article <_knot.queen.846_12.02.93.03.48.37_ at post.queensu.ca>, BOYDJ at QUCDN.QueensU.CA (Jeff Boyd) writes: 
|> 
|> A question has arisen in a MUAP simulation I'm running.  If I define the
|> 'scope' of an electrode to be the maximum number of motor units whose
|> activity can be detected by it during heavy exertion, what might a rough
|> estimate be for that maximum number for the biceps?  I've read that the
|> biceps normally has 750-800 motor units, and I'm wondering what the scope
|> of a 5mm surface disk electrode might be.

In my experience, the activity from the 3-4 largest and fastest units masks out the rest.

-philippe 



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