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refers to a cortical area in the postcentral gyrus defined on the basis of cytoarchitecture in the rhesus macaque (Macaca mulatta). The author regarded it as the same as area 2 of Brodmann (guenon). The cortical thickness was 1.24 mm. The molecular layer of the cerebral cortex (I) was narrower than in area 5 of Peele and area 7 of Peele and contained more cells. The external granular layer (II) was about 9 cells deep with granule cells larger than in layer IV; an occasional small pyramidal cell was seen;and the boundary with layer III was indistinct. Cells in the external pyramidal layer (III) were densely distributed pyramidal cells, many triangular in shape, arranged in three sublayers with smaller cells in the outer sublayers and many large cells deeper. The internal granular layer (IV) was composed predominantly of very small granule cells and was about 12 cells deep. The internal pyramidal layer (V) was ill-defined and contained pyramidal cells ranging from small in the outer portion to a few large cells deeper. The multiform layer (VI) was more densely populated than in area 1 of Peele; it contained small pyramidal cells and fusiform cells, many with processes parallel to the cortical surface ( Peele-1942 ).
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