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parasympathetic nervous system

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parasympathetic nervous system

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Also known as Parasympathetic nervous system, PNS

one of the three divisions of the autonomic nervous system, the others being the sympathetic nervous system and enteric nervous system.

Key facts

Synonyms
Parasympathetic autonomic nervous system
Latin
pars parasympathica divisionis autonomici systematis
Acronym
PSNS or PANS
Mesh
D010275
Ta98
A14.3.02.001

via Wikipedia infobox

Research

62,981 papers

via PubMed

Wikidata facts

Image
1503 Connections of the Parasympathetic Nervous System.jpg
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Commons category
Parasympathetic nervous system
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Encyclopedic overview

The parasympathetic nervous system (PSNS) is one of the three divisions of the autonomic nervous system, the others being the sympathetic nervous system and the enteric nervous system.

The autonomic nervous system is responsible for regulating the body's unconscious actions. The parasympathetic system is responsible for stimulation of "rest-and-digest" or "feed-and-breed" activities that occur when the body is at rest, especially after eating, including sexual arousal, salivation, lacrimation (tears), urination, digestion, and defecation. Its action is described as being complementary to that of the sympathetic nervous system, which is responsible for stimulating activities associated with the fight-or-flight response. In contrast to the sympathetic division, which predominates during acute stress responses, parasympathetic activity promotes energy conservation, metabolic storage (for example by enhancing glycogen synthesis), and the maintenance of internal homeostasis over longer time scales.

Excerpted from Wikipedia’s “parasympathetic nervous system” article, available under the CC BY-SA 4.0 licence.