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refers to the outermost of three parts of area 24o in the anterior cingulate cortex of the human and the macaque. Defined on the basis of multiple criteria, the others are area 24a and area 24b. In the human, 24c is described in two ways. In an earlier version it was described as located in the walls of the cingulate sulcus where the sulcus separates the anterior cingulate gyrus from the external cingulate gyrus. In that parcellation it is bounded rostrally by area 32o and caudally by area 24ab, and it has two components, an inner area 24cv and an outer area 24cd ( Vogt-2012 ). In a more recent version, where its architectonic features are compared with other species, it is bounded rostrally only by area p32 and area d32 of area 32o and caudally only by the dorsal two-thirds of area 24ab ( Vogt-2013 ).
In the macaque it is located dorsally in the anterior cingulate gyrus where it is bounded by the superior frontal gyrus, area 8B ( Petrides-2012 ), ventrally by area 24b and area 32o and caudally by area a24cpr ( Vogt-2005; Vogt-2013 ). Note that in an earlier segmentation, 24c referred to the combination of two current areas: 24c of anterior cingulate cortex and area a24cpr of midcingulate cortex ( Vogt-1987 ).
The rat and mouse have no equivalent area ( Vogt-2013 ).
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