The term cingulate region refers to a cytoarchitecturally defined portion of the cerebral cortex that occupies much of the medial surface of the hemisphere surrounding the corpus callosum. It is composed of the area 23 of Brodmann (human), the area 31 of Brodmann (human), the area 24 of Brodmann (human), the area 25 of Brodmann (human), the area 33 of Brodmann, the area 32 of Brodmann (human) and the area 32 of Brodmann (guenon) ( Brodmann-1909 ). See also cingulate cortex.