Longitudinal Cerebral Fissure Of The Human Brain, Anatomy

Description

Longitudinal cerebral fissure separates the right and left cerebral hemispheres along the midline, extending in the sagittal plane from the frontal pole anteriorly to the occipital pole posteriorly. Superiorly, the fissure begins at the superomedial borders of the frontal lobes near the frontal crest region of the calvaria, then continues posteriorly between the parietal lobes toward the occipital poles. Within the depth of this interhemispheric cleft, the falx cerebri occupies the median vertical space between hemispheres, and the superior sagittal sinus typically courses along its attached superior margin near the inner table of the skull. Midline separation is the point. Clinically, the longitudinal fissure is a key corridor for interhemispheric neurosurgical approaches to the pericallosal and callosomarginal arteries, anterior cerebral artery (ACA) branches that run on the medial surfaces of the frontal lobes adjacent to the falx. Pathology here is specific: subfalcine (cingulate) herniation displaces the medial frontal lobe under the free edge of the falx and can compress the ACA, producing ischemia in the leg-dominant motor cortex. The fixed sagittal emphasis in this illustration makes the anterior-to-posterior continuity of the fissure easy to relate to midline dural anatomy and venous drainage patterns, a helpful pairing when teaching superior sagittal sinus thrombosis or planning exposure around parasagittal meningiomas. Neuroanatomy faculty can place this illustration alongside coronal and axial brain sections to orient students to the interhemispheric cleft before introducing the corpus callosum, cingulate gyrus, and falx attachments. It also fits atlases, operative manuals, and radiology primers that need a clean reference for midline landmarks when describing parasagittal hemorrhage, falcine lesions, or ACA territory infarcts. Anatomical accuracy verified by SciePro's Medical Advisory Board.