The Calcarine Sulcus Of The Human Brain In Posterior View

Description

Arising on the medial surface of the occipital lobe, the calcarine sulcus runs roughly horizontal and slightly anterolateral from the occipital pole, meeting the parieto-occipital sulcus superiorly near the cuneus and lingual gyrus. In posterior view, the animation tracks the sulcus as a deep cleft separating the cuneus (superior) from the lingual gyrus (inferior), with the surrounding cortex curving toward the midline at the interhemispheric fissure. Subtle camera motion clarifies depth and continuity as the groove courses forward toward the posterior end of the corpus callosum. A sharp landmark. Clinical relevance centers on the primary visual cortex (V1, Brodmann area 17), which straddles the banks of the calcarine sulcus and receives retinotopically organized input from the lateral geniculate nucleus via the optic radiations. Lesions in the posterior cerebral artery territory that involve the calcarine cortex often produce homonymous hemianopia, classically with macular sparing when collateral supply from the middle cerebral artery preserves occipital pole cortex. Animated sweep along the sulcus makes it easier to teach why small, strategically placed infarcts or contusions can yield predictable visual field deficits, and how the superior and inferior banks map to the contralateral lower and upper visual fields, respectively. Use this sequence in neuroanatomy lectures on occipital lobe landmarks, in radiology teaching that correlates midline occipital sulci with sagittal MRI anatomy, or in neurology materials explaining cortical visual pathway syndromes and posterior circulation stroke patterns. Anatomical accuracy verified by SciePro's Medical Advisory Board.