The term inferior rostral gyrus refers to a convolution on the medial surface of the frontal lobe in the human ( Mai-1997 ). It and the superior rostral gyrus constitute the paraterminal gyrus. Defined topologically by dissection, it is bounded dorsally by an unnamed groove that separates it from the superior rostral gyrus. It is bounded ventrally by the rostral sulcus, which separates it from the straight gyrus. It is not found in the macaque where the comparable area ventral to the rostrum of the corpus callosum and rostral to the lamina terminalis is not distinguished from the anterior cingulate gyrus ( Martin-2000 ). Neither is it found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ). Updated 11 Jun 2024.