PSY 102 Lecture Notes - Lecture 4: Magnetic Resonance Imaging, Dura Mater, Pia Mater
13 Nov 2016
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Document Summary
Brain and spinal cord are protected by bone. Three layers of tissue also helps protect our brain and spinal cord. Cerebral spinal fluid surrounds the brain and spinal cord. The three layers of tissue that encase the central nervous system: dura mater: The outermost of the meninges; tough and flexible. Attached to the skull: arachnoid mater: The middle layer of the meninges, located between the dura mater and the inner pia mater. Subarachnoid space: contains cerebral spinal fluid and blood vessels: pia mater: The layer of the meninges that clings to the surface of the brain; thin and delicate. Four hollow spaces located inside the brain. Csf supports the weight of the brain. Helps reduce shock to the cns caused by sudden head movements. Recirculation of spinal fluid 3 or 4 times a day with adults. Sympathetic division is engaged during a crisis or after actions requiring fight or flight. When one is activated, the other is inactive.
