Brain's Postcentral Sulcus, Superior View

Description

Postcentral sulcus outlines the posterior border of the postcentral gyrus on the superior surface of the cerebral hemisphere, running roughly parallel and posterior to the central sulcus. Medially, the sulcus approaches the interhemispheric fissure near the paracentral lobule, while laterally it trends toward the superolateral margin where it typically breaks into short segments rather than a single continuous groove. Immediately posterior to it lies the superior parietal lobule, and its relationship to the intraparietal sulcus helps define the transition from primary somatosensory cortex to higher-order parietal association territory. Orientation is everything. For cortical localization, the postcentral sulcus is a dependable landmark when you need to separate primary somatosensory cortex (postcentral gyrus, Brodmann areas 3, 1, and 2) from the superior parietal lobule during operative planning or lesion description. Infarction in the anterior parietal region supplied by middle cerebral artery branches can produce contralateral sensory loss, astereognosis, or impaired two-point discrimination, and reports often reference the sulcal boundaries when correlating deficits with cortical involvement. The superior viewpoint supports teaching and publication graphics because it preserves the medial-to-lateral course of the sulcus and its proximity to the central sulcus without foreshortening the parietal convexity. Neuroanatomy and neuroscience courses can pair this illustration with somatotopic maps of the postcentral gyrus, while neurosurgery and neuroradiology texts can use it to anchor discussions of cortical mapping, perirolandic tumors, and the distinction between precentral and postcentral operative corridors. It also fits clinical documentation graphics for stroke localization and epilepsy conference materials when describing perirolandic seizure onset zones relative to the postcentral sulcus. Anatomical accuracy verified by SciePro's Medical Advisory Board.