Figure 5.

A, B, Forearm EMG activation patterns associated with HFLD-ICMS delivered during (A) generation of voluntary extension force, and (B) generation of voluntary flexion force. HFLD-ICMS was applied at this cortical site with the wrist task manipulandum locked in place at 30° of wrist extension (black traces) or 30° of flexion (gray traces). Gray shading represents the 500 ms stimulus train (100 pulses at 120 μA). Stimulus-evoked EMG activity for the same muscles are displayed at the same gain. With the wrist free to move, HFLD-ICMS at this site drove the wrist toward extension.