Central Sulcus Of The Human Brain, Anatomy

Description

Central sulcus (sulcus centralis, fissure of Rolando) cuts obliquely across the superolateral surface of a cerebral hemisphere, forming the primary boundary between the frontal lobe anteriorly and the parietal lobe posteriorly. Immediately anterior to the sulcus, the precentral gyrus follows its contour; immediately posterior, the postcentral gyrus parallels it, with the two gyri separated by the sulcal fundus and lips. Superiorly, the groove approaches the superomedial margin near the paracentral lobule, while inferiorly it typically ends short of the lateral (Sylvian) fissure. Neighboring frontal and parietal opercular cortex frames the inferior end of the Rolandic region. Localizing the central sulcus matters whenever you need to separate primary motor cortex (Brodmann area 4) from primary somatosensory cortex (areas 3, 1, 2), because lesions that straddle this single landmark can flip a case from weakness to sensory loss, or produce both. Stroke in the middle cerebral artery territory often involves perirolandic cortex, so the exact sulcal relationship helps explain a face and upper-limb predominant deficit, while medial extension toward the paracentral lobule accounts for leg involvement. The illumination and sulcal relief in a 3D illustration makes the precentral “motor strip” and postcentral “sensory strip” readable at a glance, including the subtle posterior tilt of the sulcus that trainees often misidentify as a branch of the postcentral sulcus. Orientation matters. Use this illustration in neuroanatomy courses when teaching lobar boundaries and cortical homunculus mapping, and in neurology or neuroradiology teaching files when correlating perirolandic infarct patterns with contralateral motor and sensory findings. It also suits neurosurgical education for planning craniotomy corridors near the Rolandic cortex and for explaining intraoperative motor mapping targets to learners. Anatomical accuracy verified by SciePro's Medical Advisory Board.