| The term proisocortex refers to one of two subdivisions of the neocortex; the other is true isocortex, which is characterized by the typical six layered cytoarchitecture of the neocortex. Proisocortex is transitional between the true isocortex and periallocortex. Defined according to phylogenetic, ontogenetic and cytoarchitectonic criteria, proisocortex is found in portions of the cingulate gyrus, the insula, the parahippocampal gyrus, and the subcallosal area (Stephan-75; Zilles-90). |
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