glossopharyngeal nerve

glos·so·pha·ryn·ge·al nerve

G0157000 (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.

[Greek glōssa, tongue + pharyngeal.]

glossopharyngeal nerve

(ˌɡlɒsəʊˌfærɪnˈdʒiːəl) n (Anatomy) the ninth cranial nerve, which supplies the muscles of the pharynx, the tongue, the middle ear, and the parotid gland

Thesaurus

Noun

glossopharyngeal nerve - sensory nerve to the pharynx and back of the tongue; motor fibers innervate muscles that elevate the pharynx and larynx; includes parasympathetic fibers to the otic ganglionnervus glossopharyngeus, ninth cranial nervecranial nerve - any of the 12 paired nerves that originate in the brain stem

Glossopharyngeal Nerve

glossopharyngeal nerve

[¦gläs·ō·fə′rin·jē·əl ‚nərv] (neuroscience) The ninth cranial nerve in vertebrates; a paired mixed nerve that supplies autonomic innervation to the parotid gland and contains sensory fibers from the posterior one-third of the tongue and the anterior pharynx.

Glossopharyngeal Nerve

the ninth pair of cranial nerves. It consists of sensory, motor, and secretory fibers. The nuclei of the nerve are located in the medulla oblongata. The common trunk of the nerve emerges from the cranial cavity through the jugular foramen together with the vagus and accessory nerves and internal jugular vein.

The glossopharyngeal nerve supplies the mucous membrane of the radix linguae, pharynx, soft palate, eustachian tube, and tympanic cavity with sensory fibers. The taste fibers that innervate the posterior third of the tongue enter the peripheral portion of the taste receptors. The motor and secretory fibers innervate some pharyngeal muscles and the parotid gland, respectively. One of the sensory branches of the glossopharyngeal nerve also carries impulses from the carotid sinus, thereby participating in the regulation of blood circulation.

Injury to the glossopharyngeal nerve impairs swallowing and taste. In some cases, compression of the nerve causes neuralgia, manifested chiefly by pain in the regions innervated by it.

glossopharyngeal nerve

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.

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: illustrationSee 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.

glossopharyngeal nerve

glos·so·pha·ryn·ge·al nerve

glossopharyngeal nerve

Glossopharyngeal Nerve

glossopharyngeal nerve

Glossopharyngeal Nerve

glossopharyngeal nerve

glossopharyngeal

glossopharyngeal nerve

glossopharyngeal nerve

Sensory

Motor

Course

glossopharyngeal nerve

glossopharyngeal nerve

Synonyms for glossopharyngeal nerve

noun sensory nerve to the pharynx and back of the tongue

Synonyms

Related Words