Figure 1.

A, Radiographic control of an electrode implanted in the STN. B, Section counterstained with cresyl violet showing the trace of the stimulation electrode in the anteromedial STN in monkey B. C, C′, Schematic representation of the brain section corresponding to the center of the stimulation contact 0, indicated by a cross (+) in monkey A and monkey B, respectively. The gray areas represent the electrode trace. D, D′, Reconstruction of the electrodes (blue) and the STN (green) from regularly spaced brain sections (50 μm thickness), viewed laterally in monkey A and monkey B, respectively. E, E′, The STN (green), putamen (Pu, red), caudate nucleus (Cd, pink), and the electrode (blue), as seen on regularly spaced brain sections. Thal, Thalamus. Scale bar, 1 mm.