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Fig. 12. Sample EMG sequence with shaded bars indicating the kinematic downstroke.
The pectoralis, biceps and extensor metacarpi radialis were all generally
activated approximately 0.025 s prior to the kinematic downstroke; activation
in these three muscles ceases at approximately mid-downstroke. The
supracoracoideus was typically activated just prior to the end of the
kinematic downstroke and ceased activation near the middle of the kinematic
upstroke just prior to the beginning of downstroke activation. Note that the
right extensor metacarpi radialis recording in this example was from a failed
implant.
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