glossopharyngeal nerve


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Related to glossopharyngeal nerve: glossopharyngeal neuralgia

glossopharyngeal

 [glos″o-fah-rin´je-al]
pertaining to the tongue and pharynx.
glossopharyngeal nerve the ninth cranial nerve; it supplies the carotid sinus, mucous membrane, and muscles of the pharynx, soft palate, and posterior third of the tongue, and the taste buds in the posterior third of the tongue. By serving the carotid sinus, the glossopharyngeal nerve provides for reflex control of the heart. It is also responsible for the swallowing reflex, for stimulating secretions of the parotid glands, and for the sense of taste in the posterior third of the tongue. See also anatomic Table of Nerves in the Appendices.

glossopharyngeal nerve

(glô′sō-fə-rĭn′jē-əl, -jəl, -făr′ən-jē′əl, glŏs′ō-)
n.
Either of the ninth pair of cranial nerves that contain both sensory and motor fibers and supply the tongue, soft palate, pharynx, and parotid gland.
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GLOSSOPHARYNGEAL NERVE

glossopharyngeal nerve

A mixed nerve that is sensory for taste and for the carotid sinus and body, and motor for secretion of saliva and contraction of the pharynx.

Sensory

Taste fibers from the posterior third of the tongue join visceral sensory fibers from the pharynx, auditory tube, middle ear, carotid sinus, and carotid body and run back to their neuronal cell bodies in the superior and inferior ganglia of the glossopharyngeal nerve, located in the jugular foramen. The axons of these ganglionic neurons follow the glossopharyngeal roots into the hindbrain where they synapse in the nucleus of the tractus solitarius and the spinal nucleus of the trigeminal nerve.

Motor

The glossopharyngeal nerve emerges from the medulla as a line of small rootlets just anterior to the rootlets of the vagus nerve (CN X). The glossopharyngeal rootlets collect into a single nerve that emerges from the skull through the jugular foramen, along with the vagus and spinal accessory (CN XI) nerves. The glossopharyngeal nerve then divides into branches as it runs along the stylopharyngeus muscle.

Course

CN IX.

Synonym: ninth cranial nerve See: illustration
See also: nerve

glossopharyngeal nerve

the 9th CRANIAL NERVE of vertebrates; a dorsal root nerve. It is concerned with the swallowing reflex and back of the tongue taste buds in mammals.
References in periodicals archive ?
A glossopharyngeal nerve block is an excellent adjunct to the pharmacological treatment of GPN for rapid pain.
The glossopharyngeal nerve, glossopharyngeal neuralgia and the Eagle's syndrome --current concepts and management.
The communicating branches from the bovine CCG to the cranial nerves and their branches were more similar to that in the Bactrian camel, yak and whit yak, with two differences: the absence of a communication branch with the pharyngeal branch of the vagus nerve in the yak, white yak, Bactrian camel, and the presence of a communicating branch with the glossopharyngeal nerve in the yak and white yak.
Group V--Direct laryngoscopic intubation after 4% lignocaine spray and glossopharyngeal nerve block (DL-GNB+LS)
(1) It is innervated by Herrings nerve, a branch of glossopharyngeal nerve. Blood flow is mainly from the external carotid artery, but can also be supplied from the vertebral artey.
* One intriguing possibility is that when our patient was upright, crowding of the craniocervical junction by the cerebellar tonsils compressed the medulla and resulted in dysfunction of the glossopharyngeal nerves. When she was supine, the pressure on the medulla was relieved, resulting in improved glossopharyngeal nerve function.
Some of these branches, together with the glossopharyngeal nerve, carry out chemoreceptor and baroreceptor functions in the carotid glomus and sinus, respectively.
Neuralgia of the glossopharyngeal nerve is a rare entity, with an estimated incidence of 0.8 cases per 100,000.
Other atypical presentations of this disease include entrapment of glossopharyngeal nerve (6) and even hypoglossal nerve palsy with Horner's syndrome.
From there it passes posterior to the glossopharyngeal nerve and lateral to the thyroid and then into the mediastinum.