Sulcus Centralis, Lateral View

Description

Seen from the lateral aspect of a male cerebral hemisphere, the sulcus centralis is traced as a prominent groove running obliquely from the superomedial margin of the convexity toward the lateral (Sylvian) fissure, dividing the frontal lobe anteriorly from the parietal lobe posteriorly. The precentral gyrus lies immediately anterior to the sulcus and the postcentral gyrus immediately posterior, their cortical folds rendered with clear gyral and sulcal relief. Inferoposteriorly, the cerebellar hemisphere sits posterior to the brainstem, with the pons and medulla oblongata descending toward the foramen magnum. A single highlighted line directs attention. Clinically, the central sulcus remains a primary surface landmark for localizing primary motor cortex (Brodmann area 4) in the precentral gyrus and primary somatosensory cortex (areas 3, 1, 2) in the postcentral gyrus, a distinction that guides lesion localization in stroke syndromes and preoperative planning. During tumor resection or epilepsy surgery, neurosurgeons often correlate this sulcus with neuronavigation, functional MRI, and intraoperative mapping to avoid postoperative weakness or sensory loss. Its position also helps orient interpretation of lateral angiographic and cross-sectional imaging when translating deep lesions to the cortical surface. Neuroanatomy and neuroscience courses use this view to teach lobar boundaries, gyral nomenclature, and the motor homunculus versus somatosensory homunculus relationship at the Rolandic cortex, while clinical texts and patient education materials can pair it with lateral head diagrams to explain contralateral deficits after middle cerebral artery territory infarct. Suitable for neurology, neurosurgery, neuroradiology, and rehabilitation medicine publications where rapid identification of the sulcus centralis on the cerebral convexity matters. Anatomical accuracy verified by SciePro's Medical Advisory Board.