Figure 2.

A, A photomicrograph showing a fluorescent electrode track in a section of the cortex cut tangentially to the surface through area 3b of monkey MCh73. The electrode was dipped in DiI before making the penetration. B, A “continuous” electrolytic lesion (see Materials and Methods) marking the electrode track (black arrow) in area 3b of the posterior bank of the central sulcus of monkey MCh21 and a focal lesion (white arrow). The section of the cortex was cut in a plane perpendicular to the central sulcus and stained for cytochrome oxidase. C, An example of recording sites along the electrode tract of the section shown in B (black arrow). For legend to the symbols, see legend to Figure 4 A. Scale bars: A, 500 μm; C, 1 mm.