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refers to a convolution on the medial surface of the frontal lobe in the human ( Mai-1997 ). Defined on the basis of dissection and stains for Nissl substance, it is bounded ventrally by an unnamed groove that separates it from the inferior rostral gyrus. It is bounded superiorly by the cingulate sulcus, which separates it from the cingulate gyrus. It is not found in the macaque, where the comparable area dorsal to the rostral sulcus is occupied by the anterior cingulate gyrus ( Martin-2000 ). Equivalent structures do not appear in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).
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