NSC 4366 Lecture Notes - Lecture 4: Arachnoid Mater, Dura Mater, Pia Mater
Document Summary
Dura mater: strongest, tough, fibrous membrane that ensheathes the brain like a loose fitting bag: tough membrane. Can be tightly adherent to the skull. Can be separated by narrow extradural space. Arachnoid mater: softer, spongy: contains: trabeculae filimetous network of connective tissues where arteries and veins pass thrugh, contains csf. Pia mater: thin, delicate, highly vascular, and closely adherent to brain"s surface. Cistern: tank for storing fluid: subarachnoid cisterns. Cisterna magna: between cerebellum and dorsal surface of medulla, csf from 4th ventricle flows into this space. Dura mater is composed of two layers: two layers separate at certain places to enclose dural venous sinuses. Also know third ventricle and fourth ventricle. Lies on dorsal surface of the brain stem beneath the cerebellum. Inferior (temporal) horn: lies in temporal horn. 3 longitudinal arteries: 1 anterior spinal artery. Middle cerebral artery: largest and covers most cortical territory.
