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refers to one of three components of the cingulate gyrus in the human and the macaque. The others are the anterior cingulate gyrus and the isthmus of the cingulate gyrus ( Carpenter-1983 ). Identified by dissection it is a prominent convolution on the mesial aspect of the cerebral hemisphere.
In the human it is continuous rostrally with the anterior cingulate gyrus. Their junction is located at about the level of the central sulcus and corresponds to the boundary between cytoarchitectural area 24 (anterior) and area 23 (posterior). The structure lies dorsal to the posterior one-third of the corpus callosum, from which it is separated by the callosal sulcus. It ends caudally at the splenium of the corpus callosum where it becomes continuous with the isthmus of the cingulate gyrus. In the depth of the callosal sulcus the supracallosal gyrus partially intervenes between it and the corpus callosum. Dorsally it is separated from the postcentral gyrus rostrally by the cingulate sulcus and separated from the cuneus of the parietal lobe caudally by the splenial sulcus. Architectonically it corresponds approximately to the combination of area 23, of the posterior cingulate cortex, and the retrosplenial cortex ( Vogt-2012 ).
In the macaque it is similar to that of the human except that it occupies the posterior half the area dorsal to the corpus callosum ( Martin-2000 ), and the complexity of sulcal patterns is less ( Vogt-1987; Vogt-1995 ).
Equivalent structures are not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).
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