Figure 2.

Presence and absence of forward and backward locomotion in three spinal cats. The top, middle and bottom panels show EMG activity from eight to nine hindlimb muscles along with stance phases (horizontal thick lines) of the left (L) and right (R) hindlimbs in three spinal cats during forward (FW-biped-spinal) and backward (BW-biped-spinal) bipedal locomotion without and with perineal stimulation. For muscle abbreviations, see Figure 1. Stick figures show hindlimb kinematics of the right hindlimb for a representative cycle.