CMD 377 Lecture Notes - Lecture 4: Tentorium Cerebelli, Falx Cerebri, Superior Sagittal Sinus
22 Feb 2017
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Cmd 377 - lecture 4 - meningeal coverings of the brain and spinal cord. Membranous coverings between the brain and skull. They stabilize shape and position of brain. Buoyant effect of the cerebrospinal fluid (csf) within meninges decreases effect of various forces of the brain. Makes brain function as if it weighs very little. Attached to the inner surface of the skull. Outer layer serves as periosteum of the inner surface of the skull. Throughout most of the brain, these 2 layers are tightly fused together. There are some parts where there are openings between the 2. Places where the inner dural layer folds in on itself as a sheet-like protrusion. Falx cerebri folds between the 2 cerebral hemispheres. Tentorium cerebelli separates cerebrum and cerebellum. Tentorial notch spaces in tentorium through which the brainstem paces. Falx cerebelli partially separates the 2 cerebellar hemispheres. Sinuses formed by separation between the 2 dural layers.
