The term area Ts1 of Pandya refers to the most anterior of the three superior temporal isocortical areas defined on the basis of cytomyeloarchitecture in the macaque. Granule cells are prominent in the outer layers; the internal pyramidal layer (V) and the multiform layer (VI) are very poorly differentiated; and myelination is not prominent with only the outer band of Baillarger apparent ( Pandya-1973 ).