subcentral gyrus (SCG)

Lateral Surface of the Frontal Lobe; Precentral region

Petrides, Pandya (HNS2): The subcentral gyrus is formed by the fusion of the precentral and postcentral gyri in their ventralmost parts.  This gyrus is also known as the central (Rolandic) operculum or the inferior fronto-parietal pli de passage.  The subcentral gyrus is delimited in front and behind by the anterior (ascs) and posterior (pscs) subcentral sulci, respectively.  In some hemispheres, the subcentral gyrus is situated deep within the lateral fissure and, in those cases, the central sulcus gives the impression of joining the lateral fissure.