trigeminal

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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.

tri·gem·i·nal

(trī-jem'i-năl),
Relating to the fifth cranial (trigeminus) nerve.
Synonym(s): trigeminus
[L. trigeminus, threefold]

trigeminal

/tri·gem·i·nal/ (tri-jem´ĭ-n'l)
1. triple.
2. pertaining to the trigeminal (fifth cranial) nerve.
3. pertaining to trigeminy.

trigeminal

(trī-jĕm′ə-nəl)
adj.
Of or relating to the trigeminal nerves; trifacial.

trigeminal

[trījem′inəl]
Etymology: Gk, treis, three; L, geminus, twins
1 pertaining to the three-branch trigeminal (fifth cranial) nerve innervating the face, eyes, nose, mouth, and jaws.
2 See trigeminy.

trigeminal

1. triple.
2. pertaining to the fifth cranial (trigeminal) nerve.

trigeminal nerve paralysis
causes an inability to close the mouth (dropped jaw), difficulty in mastication and atrophy of the masticatory muscles. See also mandibular neurapraxia.
trigeminal neuritis
see seasonal headshaking.
trigeminal neuropraxia
see mandibular neurapraxia.