Trigeminal nerve

The fifth cranial nerve, formed of the ophthalmic nerve, the maxillary nerve and the mandibular nerve, which controls the sensory nerves in the forehead, face and chin, and the muscles in the jaw.


The fifth and largest cranial nerve (V), which is split into three divisions: the ophthalmic, maxillary, and mandibular nerves. The motor fibers are responsible for controlling the muscles involved in chewing, while the sensory fibers relay information about temperature, pain, and touch from the whole front half of the head (including the mouth) and also from the meninges.


The fifth cranial nerve (arising from the brain). It consists of three divisions: (1) the ophthalmic nerve, which is purely sensory in function, being distributed mainly over the forehead and front part of the scalp; (2) the maxillary nerve, which is also sensory and distributed to the skin of the cheek, the mucous membrane of the mouth and throat, and the upper teeth; and (3) the mandibular nerve, which is the nerve of sensation to the lower part of the face, the tongue and the lower teeth, as well as being the motor nerve to the muscles concerned in chewing. The trigeminal nerve is of special interest, owing to its liability to neuralgia trigeminal neuralgia, or tic douloureux as it is also known, being the most painful form known.


A large, mixed nerve arising from the pons in a large sensory root and a smaller motor root. At the junction of the roots, the semilunar gasserian ganglion gives rise to three branches. These branches are ophthalmic, purely sensory, from the skin of the upper part of the head, mucous membranes of the nasal cavity and sinuses, cornea, and conjunctiva; maxillary, purely sensory, from the dura mater, gums and teeth of the upper jaw, upper lip, and orbit; and mandibular, sensory fibers from the tongue, gums, and teeth of the lower jaw, skin of the cheek, lower jaw and lip, and motor fibers supplying principally the muscles of mastication.


The fifth and most substantial set of cranial nerves; nerves with combined motor and sensory functions that emerge from the lateral aspect of the pons in the brainstem.


The trigeminal nerve, also known as the fifth cranial nerve, consists of paired nerves situated on either side of the face, originating from the brainstem. Each of these nerves branches into three divisions, delivering sensory input to the face, scalp, nose, teeth, oral mucosa, upper eyelid, sinuses, and the anterior part of the tongue. Additionally, these nerves play a role in triggering the contraction of jaw muscles for the purpose of chewing.


The fifth cranial nerve, which bifurcates into three primary branches and provides innervation to the face. Also referred to as the trifacial nerve.


 


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