The term superior frontal gyrus (SFG) refers to the topologically defined convolution of the frontal lobe (FLB) that is located on the dorsal surface facing the longitudinal fissure (lgf). In the human it is bounded caudally by the precentral gyrus (PRG). It extends rostrally to the superior frontopolar gyrus (FPGs). On the mesial surface it is separated from the anterior cingulate gyrus (CGGa) by the cingulate sulcus (cgs). On the dorsolateral surface it is separated from the middle frontal gyrus (MFG) by the superior frontal sulcus (sfrs) ( Mai-1997 ). In the macaque, the SFG extends from the spur of the arcuate sulcus (sas) to the frontal pole (frp). The dorsolateral and medial boundaries are the same as in the human, except for a short ill-defined boundary with the straight gyrus (SRG) where the cgs ends short of the frontal pole (frp) ( Martin-2000 ). The macaque also has a superior precentral dimple (spd) located anterior to the central sulcus (cns) on dorsal surface of SFG that is not present in the human ( Bonin-1947 ). Histologically, the SFG is neocortex (Brodmann-1909). Equivalent structures are not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ). Final 26 Mar 2025.