Figure 10. Stimulus-triggered averages (StTAs) of EMG activity during ankle flexion and extension.
StTAs of 4 muscles of the hindlimb from 4 sites in the lumbar enlargement of the spinal cord. Time of triggered events are listed at the bottom of each stimulus graph. Stimulus occurs at time 0 ms. The gray box indicates the time of stimulation. EMG electrodes were inserted and recorded from four hindlimb muscles: Lateral Gastrocnemius (LG), Biceps Femoris (BF), Vastus Lateralis (VL), and Tibialis Anterior (TA).