trigeminal nerve

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trigeminal

 [tri-jem´ĭ-nal]
triple.
pertaining to the fifth cranial nerve (trigeminal nerve).
trigeminal nerve the fifth cranial nerve; it arises in the pons, is composed of sensory and motor fibers, and has three divisions: ophthalmic, maxillary, and mandibular. (See anatomic Table of Nerves in the Appendices.) The ophthalmic division supplies sensory fibers to the skin of the upper eyelid, side of the nose, forehead, and anterior half of the scalp. The maxillary division carries sensory impulses from the mucous membranes of the nose, the skin of the cheek and side of the forehead, and the upper lip and upper teeth. The mandibular division carries sensory impulses from the side of the head, chin, mucous membrane of the mouth, lower teeth, and anterior two-thirds of the tongue. (This nerve is sometimes called the great sensory nerve of the head.) The motor fibers are part of the mandibular branch and supply several of the muscles of chewing. Neuralgia of this nerve is the condition known as tic douloureux.
Areas of innervation by each of the three branches of the trigeminal nerve.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

trigeminal nerve

n.
Either of the fifth pair of cranial nerves, being the chief sensory nerve of the face and the motor nerve of the muscles of chewing and having sensory and motor functions in the teeth, mouth, and nasal cavity. Also called trigeminus.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

trigeminal nerve

The 5th of the 12 pairs of cranial nerves and the sensory nerve of the face. Each trigeminal nerve divides into three main branches, the ophthalmic, the maxillary and the mandibular nerves, which then branch to supply the corresponding parts of the face.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

trigeminal nerve

the fifth cranial nerve of vertebrates, usually possessing opthalmic, mandibular and maxillary branches.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Nociception within the trigeminal system could be different from other, common, found pain-processing mechanisms.
This is consistent with previous research on the somatic system that suggests an inhibitory mechanism of dexmedetomidine on [I.sub.Na] through the activation of [alpha]2-adrenoceptors in the trigeminal system.
(17) As the trigeminal system is primarily responsible for processing input from cutaneous sources, projected pain is 'felt' within the respective trigeminal fields.
A high degree of overlap can be construed as evidence that the trigeminal system and its inherent sensitivities have served to mold the suite of compounds arthropods use as allomones.
Stimulation was used to reproduce the sensitization of the trigeminal system which is present in headache and migraine [22].
For example, important direct connections have been demonstrated in rats between the nuclear trigeminal system and the PAG and, therefore, with the PAG-RVM system [87, 138, 139] and from these structures into areas of the ventrolateral orbital cortex, nucleus accumbens, or the amygdala: in the limbic or affective-motivational centers of the pain-related neural system [140].