The term area PC of Bonin refers to an area of the cerebral cortex defined on the basis of cytoarchitecture in the macaque. It is a 5mm wide strip of isocortex located in the parietal lobe posterior to the central sulcus. It extends as a narrow strip onto the medial surface of the hemisphere to the cingulate sulcus and on the lateral surface ventrally to the lateral fissure. The ventral-most portion, area PCop of Bonin extends into the frontal lobe below the ventral end of the central sulcus where it is bounded by area FCop of Bonin at the level of the anterior subcentral sulcus ( Bonin-1947 ).