The term superior parietal lobule refers to one of four subdivisions of the parietal lobe identified by dissection in the human ( Carpenter-1983 ) and the macaque ( Martin-2000 ). Located on the dorsal margin of the cerebral hemisphere, it is, in the human, separated rostrally from the postcentral gyrus by the postcentral sulcus and a line extending from the upper end of that sulcus over the margin of the cerebral hemisphere to the cingulate sulcus, which separates it from the cingulate gyrus. Thus, it includes the caudal portion of the paracentral lobule. Caudally its boundary with the occipital lobe is an oblique plane through the parieto-occipital sulcus on the dorsomedial margin of the hemisphere and the preoccipital notch on the ventromedial margin.. Its boundary on the dorsolateral surface of the hemisphere is the intraparietal sulcus, which separates it from the supramarginal gyrus and the angular gyrus of the inferior parietal lobule. The other three parts of the parietal lobe are the inferior parietal lobule, the postcentral gyrus, and the precuneus. The boundaries in the macaque are the same except that the rostral border with the postcentral gyrus is only partially defined by a very short postcentral sulcus on the dorsolateral surface of the hemisphere. On the medial surface of the hemisphere the cingulate sulcus separates it from the precuneus, and its caudal boundary is marked by the parieto-occipital sulcus ( Martin-2000 ). Equivalent structures are not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).