Facial Nerve


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facial nerve

[′fā·shəl ‚nərv]
(neuroscience)
The seventh cranial nerve in vertebrates; a paired composite nerve, with motor elements supplying muscles of facial expression and with sensory fibers from the taste buds of the anterior two-thirds of the tongue and from other sensory endings in the anterior part of the throat.

Facial Nerve

 

(nervus facialis), the seventh pair of cranial nerves; a mixed nerve containing motor and sensory nerve fibers.

The nuclei of the facial nerve lie in the pons varolii. The conductors connected to these nuclei form the trunk of the facial nerve, which passes through the internal auditory meatus and the pyramid of the temporal bone to emerge from the cranial cavity through the stylomastoid foramen. The nerve divides into its terminal branches in the parotid gland.

The facial nerve’s motor conductors innervate the mimetic musculature, the stylohyoid muscle, the posterior venter of the digastric muscle, and the subcutaneous muscle of the neck. Its autonomic fibers innervate the salivary glands, the lacrimal glands, and the glands of the mucosae of the nasal cavity, palate, and upper pharynx. Its sensory fibers provide the gustatory innervation of the anterior two-thirds of the tongue. The autonomic and sensory fibers of the facial nerve in the vicinity of the brain stem form the nervus intermedius, the largest branch of which is called the chorda tympani. The most frequent pathology of the facial nerve is paralysis.

References in periodicals archive ?
2) In 15% of cases, the facial nerve was congenitally exposed, and a further 17% of cases had FCD due to cholesteatoma.
Classical Shape- The sinus is located between the ponticulus and subiculum lying medial to the vertical part of facial nerve and to the pyramid.
For surgery, the capacity for preservation of the facial nerve might change inversely with size of the ANs.
Facial nerve paralysis in cattle is one of the unusual conditions reported.
Neurological examination revealed unilateral lower motor neuron paresis of right facial nerve.
In malignant diseases, the paralysis of the facial nerve may be due to the perineural infiltration of the temporal bone or facial nerve, central nervous system lymphoma or invasion to the meninx, infection and hemorrhage around the facial nerve, chemotherapy associated toxicity to the nerve and reactivation of the latent viral infection.
In absence of any systemic symptoms or signs, initially we thought about common possibilities of LMN facial nerve palsy including bell's palsy, herpes infection, Guillain-Barre syndrome, and pontine small vessel stroke.
The close relation between the facial nerve and the parotid gland demands a special technique during surgery.
A nerve stimulator was utilized to guide the dissection and identify intact motor branches of the facial nerve.
The chorda tympani nerve is the largest branch of the facial nerve in the intrapetrous compartment; it splits from the facial nerve just before it exits via the stylomastoid foramen.