Figure 3. Localization of SEF. A, B, Dorsal view of recording sites in monkey F (A) and monkey Z (B). Circle size indicates the number of neurons with task-related responses. Xs indicate sites that were sampled, but no task-related neuron was found. Solid colored lines indicate areas in which limb, orofacial, and saccadic eye movements were elicited by electrical microstimulation. Red dashed lines indicate areas in which low threshold saccades were elicited at the symmetric position in the opposite hemisphere. C, Sagittal sections from monkey F at levels indicated in A (gray lines 1 and 2) illustrate location of penetrations relative to cytoarchitectural landmarks. Black vertical lines indicate reconstructed penetration locations. The caudal penetration (C, curve 2, left) is 27 mm anterior to the interaural line. Curves 1 and 2 in C are ∼4.7 and ∼6.7 mm lateral of midline, respectively. Dots mark locations of Betz cells in primary motor cortex (M1) and supplementary motor area (SMA). Dark shading indicates granular layer in prefrontal cortex (area 9) and light shading indicates the incipient granular layer that is characteristic of SEF. Dashed lines indicate a damaged region. D, Sagittal sections from monkey Z at levels indicated in B (gray lines 3 and 4). Curves 3 and 4 in C are ∼6.0 and ∼8.0 mm lateral of midline, respectively. Conventions are as in C.