Vagus nerve

Nervus vagus

The longest cranial nerve, the vagus nerve (CN X) provides parasympathetic innervation to most of the thoracic and abdominal viscera, influencing heart rate, peristalsis, sweating, and speech, as well as reflexes such as coughing, swallowing, and the gag reflex. It emerges from the medulla oblongata, leaves the skull through the jugular foramen, and descends within the carotid sheath alongside the internal jugular vein and the carotid artery, giving off the recurrent laryngeal nerve and branches to the heart, lungs, and abdominal organs. Stimulation of the nerve is used to treat drug-resistant epilepsy and depression, and vagal tone shapes heart rate variability. Vagotomy was once used to treat peptic ulcers, and injury to the recurrent laryngeal branch during thyroid surgery causes hoarseness.

The tenth cranial nerve emerges from the medulla oblongata and exits the skull through the jugular foramen. It descends in the carotid sheath alongside the internal jugular vein and carotid artery. It gives off the recurrent laryngeal nerve and provides branches to the heart, lungs, and abdominal organs.

On this page

प्रकार	Nerve
शरीर तंत्र	Nervous
शरीर क्षेत्र	Neck
मूल संरचना	cranial nerve
लैटिन नाम	Nervus vagus
FMA ID	5731

कार्य

The longest cranial nerve (CN X), providing parasympathetic innervation to most thoracic and abdominal viscera. Controls heart rate, peristalsis, sweating, speech, and various reflex actions including coughing, swallowing, and the gag reflex.

नैदानिक महत्व

Vagus nerve stimulation is used to treat drug-resistant epilepsy and depression. Vagal tone affects heart rate variability. Vagotomy was historically used to treat peptic ulcers. Recurrent laryngeal nerve injury during thyroid surgery causes hoarseness.

उप-संरचनाएं

ramus auricularis of the vagus nerve Nerve

Frequently Asked Questions

What does the vagus nerve control?

The vagus nerve (cranial nerve X) controls a wide range of autonomic functions including heart rate, digestion, respiratory rate, and reflex actions such as coughing and swallowing. It is the primary nerve of the parasympathetic nervous system and supplies motor and sensory fibers to the heart, lungs, and most abdominal organs.

Where does the vagus nerve travel?

The vagus nerve originates in the medulla oblongata of the brainstem and exits the skull through the jugular foramen. It descends through the neck alongside the carotid artery and jugular vein, passes through the thorax near the esophagus, and extends into the abdomen via the esophageal hiatus, reaching as far as the transverse colon.

What happens when the vagus nerve is damaged?

Vagus nerve damage can cause hoarseness or voice changes (due to recurrent laryngeal nerve injury), difficulty swallowing, abnormal heart rate, gastroparesis (delayed gastric emptying), and altered blood pressure regulation. Bilateral damage is particularly serious and can affect breathing and cardiac function significantly.

References

Foundational Model of Anatomy — FMA:5731 Reference anatomy ontology (University of Washington)
UBERON — UBERON:0001759 Cross-species anatomy ontology (EMBL-EBI Ontology Lookup Service)
Wikipedia — Vagus nerve Encyclopedia article (verified cross-reference)

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।

Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

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