Figure 6.

Spatial distribution of switch neurons in the STN (monkey T). A, Photomicrographs of Nissl-stained coronal sections showing the STN and adjacent structures. The white rectangle on the left section outlines the region magnified on the right section. SNc, Substantia nigra pars compacta. Arrowhead, Electrolytic mark. B, Spatial distribution of switch neurons (red circles) and nonswitch neurons (black circles) in the STN. Shown are coronal sections of the right STN arranged rostrocaudally in stereotaxic coordinates from 13 to 16 mm anterior to the level of the ear canal. Each circle represents a single neuron.