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sympathetic nervous system

sympathetic nervous system in Medicine

sympathetic nervous system n.
The part of the autonomic nervous system originating in the thoracic and lumbar regions of the spinal cord that in general inhibits or opposes the physiological effects of the parasympathetic nervous system, as in tending to reduce digestive secretions or speed up the heart.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Examples from the Web for sympathetic nervous system
Historical Examples
  • This brings the heat in close contact with the sympathetic nervous system whose headquarters is in the abdomen.

    The Mother and Her Child William S. Sadler
  • "There is what is called the sympathetic nervous system," he explained.

    The Social Gangster Arthur B. Reeve
  • There is said to be a life giving principle in grapes which builds tissue and stimulates the sympathetic nervous system.

    The Laurel Health Cookery Evora Bucknum Perkins
  • It is the solar plexus—the epigastric, sympathetic nervous system.

    The Social Gangster Arthur B. Reeve
  • These form the first traces that have come under my notice of the sympathetic nervous system.

  • Forget that you have a heart, a stomach, a liver, or a sympathetic nervous system.

    Confessions of a Neurasthenic William Taylor Marrs
  • It manifests chiefly through the sympathetic nervous system which controls the vital functions.

    Your Mind and How to Use It William Walker Atkinson
  • Depression and emotion may so effect the sympathetic nervous system as to cause a lowered circulatory activity.

  • That form of clairvoyance is a sensitiveness related to the sympathetic nervous system, the center of which is the solar plexus.

    Elementary Theosophy L. W. Rogers
  • This leads to the question whether the critical sensation specially involves the sympathetic nervous system?

sympathetic nervous system in Science
sympathetic nervous system
  (sĭm'pə-thět'ĭk)   
The part of the autonomic nervous system that tends to act in opposition to the parasympathetic nervous system, as by speeding up the heartbeat and causing contraction of the blood vessels. It regulates the function of the sweat glands and stimulates the secretion of glucose in the liver. The sympathetic nervous system is activated especially under conditions of stress. Compare parasympathetic nervous system.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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