23a, adjacent to the callosal sulcus thus closest to Brodmann area 30.
23b
23c
Further division of 23b is3.
pv23b, posteroventral part for 23b, main thalamic projections from anterior nuclei.
d23b, dorsal part of 23b, weak connections from the anterior nuclei.
References
Kobayashi Y, Amaral DG. JCompNeurol 426:339+
Vogt BA, Pandya DN, Rosene DL. Cingulate cortex of the rhesus monkey: I. Cytoarchitecture and thalamic afferents. Journal of Comparative Neurology 262(2):256-270
Shibata H, Yukie M. Differential thalamic connections of the posteroventral and dorsal posterior cingulate gyrus in the monkey. European Journal of Neuroscience
Cytoarchitecturally it is bounded dorsally by the dorsal posterior cingulate area 31, rostrally by the ventral anterior cingulate area 24, and ventrorostrally in its caudal half by the retrosplenial region (Brodmann-1909).
Brodmannarea23 is a subdivision of the cerebral cortex of the guenon defined on the basis of cytoarchitecture.
Brodmann regarded it as topographically and cytoarchitecturally homologous to the combined ventral posterior cingulate area23 and dorsal posterior cingulate Brodmannarea 31 of the human (Brodmann-1909).
Cytoarchitecturally bounded rostrally by the preparietal area 5 and the caudal postcentral area 2; caudally by the peristriate area 19; and medially by the dorsal posterior cingulate area 31.
Cytoarchitecturally bounded on the rostral and lateral aspects of the hemisphere by the frontopolar area 10, the orbital area 47, and the triangular area 45; on the medial surface it is bounded dorsally by the area 12 and caudally by the subgenual area 25.
Cytoarchitecturally bounded rostrally by the ventral anterior cingulate area 24, ventrally by the ventral posterior cingulate area23, dorsally by the gigantopyramidal area 4 and preparietal area 5 and caudally by the superior parietal area 7.
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