Figure 2: Schema of EMG-triggered FES and EMG-controlled FES In EMG-triggered FES (), EMG signal is picked up from muscle 2 and electrical stimulation is applied for muscle1. Surface electrodes pick up the EMG signal at the target muscles and simultaneously stimulate same muscles in proportion to the picked-up integrated EMG signal by the same surface electrodes in EMG-cntrolled FES () with enabling more delicate stimulation of muscles compared to EMG-triggered neuromuscular electrical stimulation. Because EMG-cntrolled FES device steadily records voluntary EMG only from the stimulated muscles, contraction of the wrong muscle can be avoided.