The sympathetic nervous system (SNS) together with the parasympathetic nervous system comprises the autonomic nervous system. Its general action is to mobilize the body in a fight-or-flight response. It is, however, constantly active at a basic level to maintain homeostasis. The name of the system has its origin related with the concept of sympath...
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http://en.wikipedia.org/wiki/Sympathetic_nervous_system
A branch of the autonomic nervous system responsible for mobilizing the body's energy and resources during times of stress and arousal.
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http://www.bbc.co.uk/radio4/reith2003/glossary.shtml
A branch of the autonomic nervous system responsible for mobilizing the body's energy and resources during times of stress and arousal.
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http://www.brainfacts.org/glossary
(from the article `nervous system, human`) The sympathetic nervous system normally functions to produce localized adjustments (such as sweating as a response to an increase in temperature) and ... ...is innervated by sympathetic and parasympathetic nerves, which have a profound effect on the resting potential and the rate of diastolic ....
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http://www.britannica.com/eb/a-z/s/198
The part of the nervous system that increases heart rate, blood pressure, breathing rate, and pupil size. It also causes blood vessels to narrow and decreases digestive juices.
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http://www.cancer.gov/dictionary?expand=S
A subdivision of the body`s nervous system that is automatic (not consciously controlled) and is involved in preparing the body for physical activity.
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http://www.encyclo.co.uk/local/20560
<anatomy, physiology> One of the two divisions of the vertebrate autonomic nervous system (the other being the parasympathetic nervous system). ... The sympathetic preganglionic neurons have their cell bodies in the thoracic and lumbar regions of the spinal cord and connect to the paravertebral chain of sympathetic ganglia. Innervate heart an...
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the thoracolumbar part of the autonomic nervous system; its preganglionic fibers arise from cell bodies in the thoracic and first three lumbar segments of the spinal cord, and its postganglionic fibers are distributed to the heart, smooth muscle, and glands of the entire body.
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One of the two divisions of the vertebrate autonomic nervous system (the other being the parasympathetic nervous system). The sympathetic preganglionic neurons have their cell bodies in the thoracic and lumbar regions of the spinal cord, and connect to the paravertebral chain of sympathetic ganglia. Innervate heart and blood vessels, sweat glands, viscera, and the adrenal medulla. Most sympathetic neurons, but not all, use noradrenaline as a post-ganglionic neurotransmitter.
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Type: Term Synonyms: sympathetic part of autonomic (visceral motor) division of peripheral nervous system
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http://www.medilexicon.com/medicaldictionary.php?t=89367
Sympathetic nervous system: A part of the nervous system that serves to accelerate the heart rate, constrict blood vessels, and raise blood pressure. The sympathetic nervous system and the parasympathetic nervous system constitute the autonomic nervous system, the branch of the nervous system that performs involuntary functions.Common Misspellings:...
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[
n] - originates in the thoracic regions of the spinal cord
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http://www.webdictionary.co.uk/definition.php?query=sympathetic%20nervous%2
Part of the autonomic nervous system that prepares the body for activity by speeding up the heart rate.
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https://www.encyclo.co.uk/local/20470
The part of the autonomic (involuntary) nervous system responsible for preparing the body for action (see adrenaline.) Antagonistic to the parasympathetic nervous system.
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https://www.encyclo.co.uk/local/20640
the part of the autonomic nervous system that raises blood pressure and heart rate in response to stress
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https://www.encyclo.co.uk/local/20875
Part of the autonomic nervous system that prepares the body for activity by speeding up the heart rate.
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https://www.encyclo.co.uk/local/20966
noun originates in the thoracic regions of the spinal cord; opposes physiological effects of the parasympathetic: reduces digestive secretions; speeds the heart; contracts blood vessels
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https://www.encyclo.co.uk/local/20974
one of the two systems that compose the autonomic nervous system; a sympathetic response dilates pupils, inhibits salivation, relaxes airways, accelerates the heartbeat, inhibits digestion, etc.
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https://www.encyclo.co.uk/local/22452
Part of the autonomic nervous system that prepares the body for action and expends energy.
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https://www.sparknotes.com/psychology/psych101/glossary/terms/
The part of the autonomic nervous system which stimulates the heart, raises blood pressure, and prepares for physical action. Activation of the SNS is commonly known as the “fight or flight response”.
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