The term cuneus refers to the major convolution on the mesial aspect of the occipital lobe. Identified by dissection in the human it is separated from the parietal lobe rostrally by the parieto-occipital sulcus, from the lingual gyrus ventrally by the calcarine fissure. It is continuous with the superior occipital gyrus at the superior margin of the occipital lobe ( Duvernoy-1992; Ono-1990 ).. The boundaries in the macaque are similar except that it is separated from the occipital gyrus caudally by the superior calcarine fissure and from the isthmus of the cingulate gyrus rostrally by a boundary undefined by anatomical landmarks ( Martin-2000 ). It has no topological equivalent in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).