Figure 3.

(A) EMG activity in the left anterior and posterior deltoids, and right FDS and EDC in the patient (left column) and one control participant (right column). EMG waveforms of the left deltoid were obtained when participants performed the task with synchronous visual feedback. The sinusoidal EMG waveforms correspond to phase clasping (C) and unclasping (U). (B) MAX of EMG activity recorded at the patient’s anterior and posterior deltoid as a function of condition. (C) RMS of EMG activity recorded at the patient’s anterior and posterior deltoid as a function of condition. The ratings significantly and positively correlated with each MAX and RMS at both the anterior and posterior deltoid (r ≥ 0.87, p < 0.01).