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sympathetic |
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sympathetic 1. Anatomy physiol of or relating to the division of the autonomic nervous system that acts in opposition to the parasympathetic system accelerating the heartbeat, dilating the bronchi, inhibiting the smooth muscles of the digestive tract, etc. 2. relating to vibrations occurring as a result of similar vibrations in a neighbouring body How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| There might also be impingement of the plexus of the carotid sheath that produces irritation of the sympathetic nerves. However, the time constant for activation of sympathetic fibers[18,29,30] and for vasoconstriction following direct stimulation of sympathetic nerves is known to be less than 10 seconds. The results of these studies may explain the efficacy of beta-blockers, drugs that block the activity of sympathetic nerves, in the prevention of sudden cardiac death," Chen says. |
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