NROB60H3 Study Guide - Ganglion, Cell Group, Internal Capsule
21 Oct 2012
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Document Summary
The structure of the nervous system: there are 12 pairs of cranial nerves that arise from the brain stem and innervate (mostly) the head. Oh, oh, oh to touch and feel very green vegetables ah! Some of the cranial nerves are part of the cns, others are part of the somatic pns, and still others are part of the visceral pns. Many cranial nerves contain complex mixture of axons that perform different functions: the cns does not come into direct contact with the overlying bone. It forms a touch, inelastic bag that surrounds the brain and spinal cord: arachnoid membrane in latin spider, this meningeal layer has an appearance and a consistency resembling a spider web. While there is no space between the dura and arachnoid, if blood vessels passing through the dura are ruptured, blood can collect here and form what is called a subdural hematoma.
