Figure 8

Functional organisation of M1 in the PMG monkey. Panel A: Left frontal lobe region of the brain of the PMG monkey with the map of the sites where intracortical microstimulation (ICMS) has been performed at a stereotaxic position corresponding to M1 in normal monkeys. Note the difficulty to identify the central sulcus and the precentral gyrus. Panel B: Map of the sites where ICMS has been performed, with indications on the body part of the observed movements and of the minimal current required to elicit the movement. D: digit, F: face, E: elbow and S: shoulder. X: No response at 80 microamps of stimulation intensity.