Fig. 6.

Patterns of responses evoked by motor cortex stimulation in STN cells. A, Two excitatory peaks with short- and long-latency onsets; B, prolonged excitatory response with a short-latency onset; C, two excitatory peaks separated by a brief inhibition; D, late excitatory response only; E, early excitatory response only. A–D,Arrows indicate the artifact of stimulation. Peristimulus time histograms were generated from 60 stimulation trials. n, Number of cells. Bottom right, Schematic representation of the position of the stimulation electrode in the motor cortex. Numberindicates the distance, in millimeters, from the interaural line.