Figure 12.

A, Response latencies of extend movements (ms) before and after the arm movement training for monkey M3 (open circles and black dots, respectively). Response latencies of monkey M2 are shown in green and red dots for contralateral and ipsilateral arm movements, respectively. Blue crosses and dots demarcate unsuccessful penetration sites (monkey M2 and M3, respectively). Larger circles indicate shorter latencies (see panel between A and B). B, Single trial “extend” latencies (ms) of monkey M2 and M3 (in the post-arm-movement training period) plotted against depth below SC surface (mm) (gray crosses and black dots, respectively). Movements of the arm ipsilateral to the stimulated SC are shown as open circles.