System, sympathetic nervous
A part of nervous system that accelerates the heart rate, constricts blood vessels, and raises blood pressure. The sympathetic nervous system together with the parasympathetic nervous system (that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles) constitute the autonomic nervous system.

Medical dictionary. 2011.

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  • System, autonomic nervous — Part of the nervous system that was once thought to be functionally independent of the brain. The autonomic nervous system regulates key functions of the body including the activity of the heart muscle (see below), the smooth muscles (e.g., the… …   Medical dictionary

  • System, parasympathetic nervous — A part of nervous system that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles. The parasympathetic nervous system together with the sympathetic nervous system (that accelerates the heart rate,… …   Medical dictionary

  • sympathetic nervous system — 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 • Hypernyms: ↑nervous system, ↑systema nervosum • Part… …   Useful english dictionary

  • Sympathetic nervous system — Infobox Anatomy Name = Sympathetic nervous system Caption = The sympathetic nervous system extends from the thoracic to lumbar vertebrae and has connections with the thoracic, abdominal, and pelvic plexuses. Mesh = Sympathetic+Nervous+SystemThe… …   Wikipedia

  • 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 …   Medical dictionary

  • Nervous system, sympathetic — A part of the nervous system that accelerates the heart rate, constricts blood vessels, and raises blood pressure. The sympathetic nervous system together with the parasympathetic nervous system (that slows the heart rate, increases intestinal… …   Medical dictionary

  • sympathetic nervous system — 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… …   Dictionary of molecular biology

  • sympathetic nervous system — one of the two divisions of the autonomic nervous system, having fibres that leave the central nervous system, via a chain of ganglia close to the spinal cord, in the thoracic and lumbar regions. Its nerves are distributed to the blood vessels,… …   Medical dictionary

  • sympathetic nervous system — one of the two divisions of the autonomic nervous system, having fibres that leave the central nervous system, via a chain of ganglia close to the spinal cord, in the thoracic and lumbar regions. Its nerves are distributed to the blood vessels,… …   The new mediacal dictionary

  • sympathetic nervous system — noun Anatomy, Physiology that portion of the autonomic nervous system which is made up of a system of nerves and ganglia which arise from the thoracic and lumbar regions of the spinal cord, and which supply the walls of the vascular system and… …   Australian English dictionary

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