sympathetic nervous system


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Related to sympathetic nervous system: central nervous system

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.

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.

sympathetic nervous system

The part of the autonomic nervous system that prepares the body to cope with stress.
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)
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.
References in periodicals archive ?
Exenatide acutely increases heart rate in parallel with augmented sympathetic nervous system activation in healthy overweight males.
Before sympathetic nervous system evaluation, pulse rate, systolic BP (SBP), and diastolic BP (DBP) were compared between two groups.
3) In Kelley's model, breast cancer patients have an overactive sympathetic nervous system, and beta-blockers specifically block the beta-adrenergic receptor of the sympathetic nervous system, helping bring these patients' metabolisms closer to balance.
Julis et al had described the probable reason for such rise in BP responses due to hyperactive sympathetic nervous system (SNS) thereby causing higher basal responses.
KEY WORDS: Mobilization, Pain, Paresthesia, Sympathetic nervous system, Thoracic spine.
While helpful in the short-term, if the response remains switched on, the continuing muscle tension can contribute to persistent pain, leading to muscle cramps, prompting more danger signals to be sent to the sympathetic nervous system, ultimately resulting in a "vicious cycle of pain".
Hall JE, daSilva AA, doCarmo JM, Dubinion J, Hamza S, Munusamy S, Smith G, Stec DE (2010) Obesity-induced hypertension: role of sympathetic nervous system, leptin, and melanocortins.
Mounting evidence implicates inflammation and sympathetic nervous system dysregulation in the pathogenesis of AF, raising questions about whether influenza might underlie or contribute to some cases of AF.
When we feel nervous, the sympathetic nervous system becomes active, causing our muscles as well as the capillary blood vessels in our extremities to contract.
The report, "Wood as a Restorative Material in Healthcare Environments," co-authored by Sally Augustin, an environmental psychologist and principal at Design with Science (Los Angeles), and David Fell, a research leader at FPInnovations, a Canadian-based not-for-profit research institute, makes the case that the natural material can lower sympathetic nervous system reactivity, which in turn can lead to improved patient recovery times and lower pain perception.
In response to an acute stressor, the body activates the sympathetic nervous system, resulting in the release of epinephrine, which in turn increases heart rate.
In this review of the evidence on salt and health, they found that high salt intake may impair the endothelium (inner lining of blood vessels involved in blood clotting and immune function), increase arterial stiffness (hardening of the arteries), weaken heart and kidney function, and interfere with the sympathetic nervous system (the "flight-or-fight" response).