HSC 350 Study Guide - Midterm Guide: Olfactory Receptor, Arachnoid Mater, Falx Cerebri
7 Feb 2017
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Document Summary
Three layers of meninges cover the brain and spinal cord. Dura mater thickest, outermost layer; protective; impermeable. Periosteal layer outer layer; continuous with the periosteum on the outside of the skull bones and sutures: not continuous with the dura mater of the spinal cord. Superior convex border forms floor of superior sagittal sinus. Inferior border houses inferior sagittal sinus: tentorium cerebelli fits between the cerebellum and occipital lobes; separating the posterior cranial fossa from the rest of the cranial vault. Arches upward along the median line to become continuous with the falx cerebri to form the straight venous sinus: falx cerebri and tentorium cerebelli function to restrict brain displacement associated with acceleration and deceleration. Venous sinus large, low pressure blood vessel return path for cerebral venous blood: between the periosteal and meningeal layers. Epidural space tight potential space between the dura and the skull: hemorrhage/hematoma caused by rupture of the middle meningeal artery during head trauma.
