Figure 1
From: A multi-pad electrode based functional electrical stimulation system for restoration of grasp

Asynchronous stimulation of motoneurons with the multi-pad electrode. Stimulation pulses (right panel) are time shifted and delivered to different tissues to activate portions of a single muscle or multiple muscles. The black circles (left panel) indicate selected pads that produce the desired muscle activation by sending charge to targeted regions in the tissues beneath the electrode.