[s2e6] Falx Cerebri <INSTANT × 2026>

The is a large, crescent-shaped fold of the dura mater—the outermost and toughest layer of the meninges—that descends vertically into the longitudinal fissure between the two cerebral hemispheres. Named for its resemblance to a sickle (from the Latin falx ), it is a critical anatomical structure that provides mechanical stability and houses vital venous drainage pathways within the cranium. Licensed by Google Anatomical Structure and Attachments

The falx cerebri is a key landmark in clinical neurology and radiology. Because it is a rigid structure, it can be involved in a life-threatening condition known as . This occurs when high intracranial pressure (caused by a tumor or hemorrhage) forces one hemisphere under the free edge of the falx, potentially compressing the anterior cerebral artery and leading to a stroke. [S2E6] Falx Cerebri

Beyond structural support, the falx cerebri is essential for the brain's circulatory system. It contains two major dural venous sinuses: The is a large, crescent-shaped fold of the

Located along the free inferior margin, it eventually joins the great cerebral vein to form the straight sinus. Clinical Significance Because it is a rigid structure, it can

The primary role of the falx cerebri is to act as a structural partition. By dividing the cranial cavity, it limits the lateral movement of the brain during sudden head rotations or impacts, protecting the delicate neural tissue from shifting excessively.

Located along the attached superior margin, it is the primary channel for draining cerebrospinal fluid and venous blood.