intermediomedial nucleus

[ ĭn′tər-mē′dē-ō-mēdē-əl ]

n.

A small group of visceral motor neurons immediately ventral to the thoracic nucleus in the thoracic and the upper two lumbar segments of the spinal cord, giving rise to the preganglionic fibers of the sympathetic nervous system.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.