The term area TG of Bonin refers to an area of the temporal lobe of the macaque defined on the basis of cytoarchitecture. It is located at the temporal pole. It differs from area TA of Bonin in that the cortex is quite thick, especially the internal pyramidal layer (V) and the multiform layer (VI) whose mutual boundary is indistinct. Except for the boundary between the molecular layer of the cerebral cortex (I) and the external granular layer (II), all of the boundaries are unclear. "These alterations casue TG to resemble FF (area FF of Bonin) on the orbital surface of the frontal lobe, with which it is intimately connected." ( Bonin-1947 )