sympathetic system definition
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- 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.
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- (January 2009). The sympathetic nervous system is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system. The autonomic nervous system functions to regulate the body's unconscious actions.The sympathetic nervous system's primary process is to stimulate the body's fight-or-flight response. It is, however, constantly active at a basic level to maintain homeostasis.he autonomic nervous system functions to regulate the body's unconscious actions. The sympathetic nervous system's primary process is to stimulate the body's fight-or-flight response.
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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.oun. 1. sympathetic 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.
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sympathetic nervous system a system of efferent dilator nerves distributed only to skeletal muscles; the existence of the system has been verified only in cats and dogs; in other species where it is not present vasodilation is achieved only by relaxation of vasoconstrictor tone. sympathetic nerves. 1. see sympathetic trunk (below).wo long ganglionated nerve strands, one on each side of the vertebral column, extending from the base of the skull to the coccyx. sympathetic trunk ganglia. ganglia situated segmentally along the paired sympathetic trunks beside the vertebral bodies.
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Sympathetic nervous system Alongside the other two components of the autonomic nervous system, the sympathetic nervous system aids in the control of most of the body’s internal organs. Stress—as in the hyperarousal of the flight-or-fight response—is thought to counteract the parasympathetic system, which generally works to promote maintenance of the body at rest.
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Nervous System Parasympathetic nervous system: The part of the involuntary nervous system that serves to slow the heart rate, increase intestinal and glandular activity, and relax the sphincter muscles. The parasympathetic nervous system, together with the sympathetic nervous system, constitutes the autonomic nervous system.
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Parasympathetic nervous system The parasympathetic nervous system (usually abbreviated PSNS, not PNS, to avoid confusion with the peripheral nervous system [PNS]) is one of the two divisions of the autonomic nervous system, the other being the sympathetic nervous system.he afferent fibers of the autonomic nervous system, which transmit sensory information from the internal organs of the body back to the central nervous system, are not divided into parasympathetic and sympathetic fibers as the efferent fibers are.
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Sympathetic Nervous System Psychology Glossary. Sympathetic Nervous System. Think about a time you've been in a really dangerous or frightening situation. In that situation your body responded by, for example, increasing your heart rate, raising your respiration, moving blood from one place (e.g., your digestive system) to another (your muscles), etc.
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sympathetic pertaining to that part of the autonomic nervous system consisting of nerves that arise from the thoracic and lumbar regions of the spinal cord, and functioning in opposition to the parasympathetic system, as in stimulating heartbeat, dilating the pupil of the eye, etc.
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autonomic nervous system The autonomic nervous system has two divisions: the sympathetic nervous system, which accelerates the heart rate, constricts blood vessels, and raises blood pressure, and the parasympathetic nervous system, which slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles. Search MedTerms:
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Fever or Chills, Age 11 and Younger Children tend to run higher fevers than adults. The degree of fever may not indicate how serious your child's illness is. With a minor illness, such as a cold, a child may have a temperature of 104°F (40°C), while a very serious infection may not cause a fever or may cause only a mild fever. With many illnesses, a fever temperature can go up and down very quickly and often, so be sure to look for other symptoms along with the fever.
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- Noun. 1. parasympathetic nervous system-originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels.parasympathetic.. parasympathetic nervous system-originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels. parasympathetic.
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- The sympathetic nervous system is described as being complementary to the parasympathetic nervous system which stimulates the body to rest-and-digest or feed and breed.January 2009). The sympathetic nervous system is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system. The autonomic nervous system functions to regulate the body's unconscious actions.
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- 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.oun. 1. sympathetic 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.
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Sympathetic nervous system The sympathetic nervous system is described as being complementary to the parasympathetic nervous system which stimulates the body to feed and breed and to (then) rest-and-digest.
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parasympathetic nervous system Noun. 1. parasympathetic nervous system-originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels.parasympathetic.oun. 1. parasympathetic nervous system-originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels. parasympathetic.
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Sympathetic nervous system Sympathetic nervous system. The sympathetic nervous system (SNS) is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system (PSNS). The autonomic nervous system functions to regulate the body's unconscious actions. The sympathetic nervous system's primary process is to stimulate the body's fight-or-flight response.
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Sympathetic Nervous System: Definition, Function & Effects The autonomic nervous system is the portion that controls all of the involuntary functions of the body. This includes the body's response to emergency situations. In this article, we discuss the sympathetic nervous system and its responses under these circumstances.
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Office of the Professions These Guidelines are offered as a matter of general guidance and do not carry the force of law. Specific questions should be directed to the actual statutory or regulatory language. Please see Deputy Commissioner's March 1999 Memo on Professional Practice Guidelines.
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Earthworm Sympathetic nervous system. The sympathetic nervous system consists of nerve plexuses in the epidermis and alimentary canal. (A plexus is a web of nerve cells connected together in a two dimensional grid.) The nerves that run along the body wall pass between the outer circular and inner longitudinal muscle layers of the wall.
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Massage and the Autonomic Nervous System The autonomic nervous system (ANS) is a system of nerves and ganglia concerned with the distribution and reception of predominantly involuntary impulses to the heart (changing its rate and force of beating), smooth muscle (vasoconstriction or dilation of arterioles) and glands (increasing or decreasing their secretion).
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Nervous System sympathetic nervous system. initiates the involuntary responses of a full-body reaction to stimuli, such as an acceleration of heart rate, respiratory rate, and blood pressure, as well as a corresponding deceleration of digestive function.
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Sympathetic Nervous System: Definition, Function & Effects Instructor: John Williams. The autonomic nervous system is the portion that controls all of the involuntary functions of the body. This includes the body's response to emergency situations. In this article, we discuss the sympathetic nervous system and its responses under these circumstances.
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parasympathetic nervous system The part of the autonomic nervous system originating in the brain stem and the lower part of the spinal cord that, in general, inhibits or opposes the physiological effects of the sympathetic nervous system, as in tending to stimulate digestive secretions, slow the heart, constrict the pupils, and dilate blood vessels.oun. 1. parasympathetic nervous system-originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels. parasympathetic.
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parasympathetic nervous system The part of the autonomic nervous system that controls rest and digestion. Noun. 1. parasympathetic nervous system - originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels.
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Sympathetic nervous system The autonomic nervous system comprises two antagonistic sets of nerves, the sympathetic and para sympathetic nervous systems. The sympathetic nervous system connects the internal organs to the brain by spinal nerves. When stimulated, these nerves prepare the organism for...