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.