FIGURE 5.

Muscle-controlled spinal cord stimulation. (A) Schematic shows EMG activity gating a train of stimuli to a spinal site below the lesion. (B) Five successful trials with AMSC (green) and unsuccessful catch trials (white). During the catch trial, the monkey made several unsuccessful attempts to produce wrist torque, as seen in the EMG and torque. The blue rectangles indicate duration and force range of target. The pink bars indicate duration of electrical stimulation in the spinal site. The red line in top row represents the threshold for gating spinal stimulation. The upper and lower traces are the EMG from ECR and wrist torque generated by the monkey, during stimulation (AMSC, in green) or without stimulation (Catch, in white). Arrows indicate times of successful task completion and reward.