BMS2011 Study Guide - Final Guide: Tegmentum, Postcentral Gyrus, Posterior Pole
15 Aug 2018
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Document Summary
Spinal cord has two regions based on innervation of limbs: cervical enlargement. Anterior rami of spinal nerves arising from it form the brachial plexus of nerves which innervate upper limbs. Inferior to which the cord continues to diminish as the conus medullaris. Anterior of rami of spinal nerves arise from here to make up the lumbar and sacral plexus of nerves that innervate lower limbs. Spinal nerves arise from spinal cord as rootlets. From nerve cell bodies in posterior horn of spinal cord gray matter. From nerve cell bodies in anterior horn of spinal cord gray matter. Spinal cord segment: portion of spinal cord giving rise to rootlets and roots which ultimately form one bilateral pair of bilateral spinal nerves. Somites: transient structures that give rise to cells in the body. Forms bone (i. e. ribs, skeleton, vertebrae: myotome. Soma of descending motor neurons: output signals to particular part of body.
