parasympathetic nervous system

parasympathetic part of autonomic division of nervous system

The parasympathetic nervous system is one of the two divisions of the vertebrate autonomic nervous system. Parasympathetic nerves emerge cranially as pre ganglionic fibers from oculomotor, facial, glossopharyngeal and vagus and from the sacral region of the spinal cord. Most neurons are cholinergic and responses are mediated by muscarinic receptors. The parasympathetic system innervates, for example: salivary glands, thoracic and abdominal viscera, bladder and genitalia[GO].

प्रकार Bone
शरीर तंत्र Nervous
मूल संरचना structure with developmental contribution from neural crest
लैटिन नाम parasympathetic part of autonomic division of nervous system
FMA ID 9907

अक्सर पूछे जाने वाले प्रश्न

What is the craniosacral outflow of the parasympathetic nervous system?
Parasympathetic preganglionic fibers originate from two regions: cranially from the brainstem via cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), and sacrally from spinal cord levels S2-S4. This craniosacral pattern distinguishes it from the thoracolumbar sympathetic system.
What neurotransmitter does the parasympathetic nervous system use?
Both preganglionic and postganglionic parasympathetic neurons release acetylcholine as their neurotransmitter, making them cholinergic. Acetylcholine acts on nicotinic receptors at ganglia and muscarinic receptors at target organs.
What are the main effects of parasympathetic activation on the body?
Parasympathetic activation promotes rest-and-digest responses: decreasing heart rate, stimulating salivation and digestion, constricting pupils, promoting urination and defecation, and enabling sexual arousal. It conserves and restores body energy.

संबंधित संरचनाएं

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चिकित्सा अस्वीकरण

यह सामग्री केवल शैक्षिक और सूचनात्मक उद्देश्यों के लिए है। इसे पेशेवर चिकित्सा सलाह, निदान या उपचार के विकल्प के रूप में नहीं माना जाना चाहिए। किसी चिकित्सा स्थिति के बारे में आपके किसी भी प्रश्न के लिए हमेशा अपने चिकित्सक या अन्य योग्य स्वास्थ्य प्रदाता से सलाह लें। इस वेबसाइट पर पढ़ी गई किसी बात के कारण कभी भी पेशेवर चिकित्सा सलाह को नजरअंदाज न करें या इसे लेने में देरी न करें।

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.