Sacral Outflow Arises from neurons located in S2-S4. Innervates the rest of the large intestine and the pelvic organs. Sympathetic Division Originates from the thoracolumbar region of spinal cord. More complex, innervates more organs. All preganglionic fibers of the sympathetic division arise from cell bodies of preganglionic neurons located in spinal cord segments T1-L2. After leaving the spinal cord, the preganglionic neurons enter the sympathetic chain, which is a sequence of connected ganglia located adjacent to the vertebral column. Although the sympathetic chain extends from the neck to the pelvis, the sympathetic fibers arise only from the thoracic and lumbar cord segments. There are 23 ganglia in each sympathetic chain. All sympathetic ganglia are close to the cord, and the postganglionic fibers which run from the ganglion to the organs they supply, are much longer than the preganglionic fibers.
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This note was uploaded on 11/22/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.