Glossopharyngeal Nerve

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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 ?
Figure 1: Evolution of serum Na levels since the diagnosis and treatment (03/01/2013) of glossopharyngeal squamous cell carcinoma until six months after discharge from Internal Medicine Department (03/16/2014).
In particular, the electrical stimulation of the pharyngeal branch of the glossopharyngeal nerve (PB-IX) is responsible for hiccup.
The esophagus, crop, jugular vein, and vagus and glossopharyngeal nerves were identified at the ventromedial aspect of the cyst and gently dissected from the cyst's surface.
Glossopharyngeal neuralgia: neurosurgical treatment and differential diagnosis.
Injury to facial, hypoglossal, glossopharyngeal, recurrent laryngeal, and lingual nerves has been reported.
Preoperative intravenous dexamethasone combined with glossopharyngeal nerve block: role in pediatric postoperative analgesia following tonsillectomy.
Odine's curse with accompanying trigeminal and glossopharyngeal neuralgia secondary to medullary telangiectasia.
2) In rare instances auditory, oculomotor, glossopharyngeal, vagus, spinal accessory and hypoglossal nerves may be affected.
O -Synuclein pathology begins in the dorsal motor nucleus of the vagus and glossopharyngeal nerves and the anterior olfactory nucleus in stage 1, extends to the locus ceruleus and caudal raphe nuclei in the pons (stage 2), then to the substantia nigra (stage 3), to the temporal mesocortex (stage 4), and finally to the neocortex (stages 5-6).
She died 4 days later with jaundice, oedema of the face and glossopharyngeal swelling.
Abnormalities of the vascular barorecptors as well as glossopharyngeal (the vagal) nerve can be responsible for the loss of BRS [31].
Percutaneous rhizotomy in the treatment of intractable facial pain (trigeminal, glossopharyngeal, and vagal nerves).