Glossopharyngeal Nerve


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Related to Glossopharyngeal Nerve: glossopharyngeal neuralgia

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.

References in periodicals archive ?
unable to mark the glossopharyngeal nerve during the embryonic period
There was one report each of PRF application to Gasserian ganglion (25), sphenopalatine ganglion (26) and glossopharyngeal nerve (27).
Taste sensation from the taste buds is also supplied by the greater petrosal, vagus, and glossopharyngeal nerves, and it has been reported that cutting the chorda tympani nerve may abolish some inhibition of the glossopharyngeal nerve.
When she was supine, the pressure on the medulla was relieved, resulting in improved glossopharyngeal nerve function.
It then ascends along the carotid sheath, passing over the superior laryngeal nerve, deep to the glossopharyngeal nerve, behind the internal carotid, piercing the thyrohyoid membrane and entering the upper lateral piriform sinus wall (18, 19).
Neuralgia of the glossopharyngeal nerve is a rare entity, with an estimated incidence of 0.
From there it passes posterior to the glossopharyngeal nerve and lateral to the thyroid and then into the mediastinum.
The stylopharyngeus muscle traverses the medial aspect of the styloid process to the lateral wall of the pharynx; it is innervated by the glossopharyngeal nerve.
The tract crosses superiorly--lateral to the common carotid artery, the glossopharyngeal nerve, and the hypoglossal nerve--and it lies between the internal and external carotid arteries.
The cutaneous orifice of the third branchial fistula also opens anterior to the sternocleidomastoid muscle, but it courses only superiorly, passing posterior to the common or internal carotid artery, superior to the hypoglossal nerve, and inferior to the glossopharyngeal nerve.