sympathetic nervous system

(redirected from Sympathetic division)
Also found in: Thesaurus, Medical, Encyclopedia.

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, speed up the heart, and contract blood vessels.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sym·pa·thet·ic nervous system

(sĭm′pə-thĕt′ĭk)
The part of the autonomic nervous system that tends to act in opposition to the parasympathetic nervous system, as by speeding up the heart and contracting the blood vessels. It also regulates the function of glands, particularly the sweat glands. The sympathetic nervous system is activated especially under conditions of stress.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

sympathetic nervous system

The part of the autonomic nervous system that prepares the body to cope with stress.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sympathetic nervous system - originates in the thoracic regions of the spinal cordsympathetic nervous system - originates in the thoracic regions of the spinal cord; opposes physiological effects of the parasympathetic: reduces digestive secretions; speeds the heart; contracts blood vessels
nervous system, systema nervosum - the sensory and control apparatus consisting of a network of nerve cells
ANS, autonomic nervous system - the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands
splanchnic nerve - any of several nerves of the sympathetic part of the autonomic nervous system that innervate viscera and blood vessels
abdominal nerve plexus, coeliac plexus, plexus celiacus, solar plexus - a large plexus of sympathetic nerves in the abdomen behind the stomach
alpha receptor, alpha-adrenergic receptor, alpha-adrenoceptor - receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasoconstriction and relaxation of intestinal muscles and contraction of smooth muscles)
beta receptor, beta-adrenergic receptor, beta-adrenoceptor - receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasodilation and increased heart beat)
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
sympatická nervová soustava
sympatiske nervesystem
sympaattinen hermosto
système nerveux orthosympathique
המערכת הסימפתטית
交感神経系
simpatinė nervų sistema
orthosympatisch zenuwstelsel
układ współczulny
sistema nervoso simpático
sympatiska nervsystemet

sym·pa·thet·ic ner·vous sys·tem

n. sistema nervioso simpático, abastecedor de los músculos involuntarios, formado por nervios motores y sensoriales.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
(3) Epinephrine and norepinephrine are the neurotransmitters of sympathetic division act on receptors [beta]1, [beta]2, [alpha]1, [alpha]2.
While the sympathetic division increases HR to accommodate the need for more oxygen at the cell level (e.g., during the practice of the three main rhythms of capoeira), the parasympathetic division decreases HR to conserve body resources (such as during the recovery period).
Sympathetic division of the peripheral nervous system signals cholinergic neurons to stimulate sweat gland secretion.