Facial nervous sysyem

NCBI Bookshelf. Sinali O. Seneviratne ; Bhupendra C. Authors Sinali O.
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Stanford Facial Nerve Center

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Facial Nerve Anatomy, Function & Diagram | Body Maps

It emerges from the pons of the brainstem , controls the muscles of facial expression , and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue. The facial nerve also supplies preganglionic parasympathetic fibers to several head and neck ganglia. The facial and intermediate nerves can be collectively referred to as the nervus intermediofacialis. The motor part of the facial nerve arises from the facial nerve nucleus in the pons , while the sensory and parasympathetic parts of the facial nerve arise from the intermediate nerve. From the brain stem, the motor and sensory parts of the facial nerve join together and traverse the posterior cranial fossa before entering the petrous temporal bone via the internal auditory meatus. Upon exiting the internal auditory meatus, the nerve then runs a tortuous course through the facial canal , which is divided into the labyrinthine, tympanic, and mastoid segments. The labyrinthine segment is very short, and ends where the facial nerve forms a bend known as the geniculum of the facial nerve genu meaning knee , which contains the geniculate ganglion for sensory nerve bodies.
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The Facial Nerve (CN VII)

The facial nerve is the 7th cranial nerve and carries nerve fibers that control facial movement and expression. It has small branches involved in moderating our sensitivity to noise volume stapedius muscle and several other muscles not involved in routine facial expression 1. The cells that transmit information within the facial nerve originate in the base of the brain, or the brain stem, in a region called the pons. The nerve must therefore travel through the base of the skull in order to reach the face. Along this route, the facial nerve travels in close proximity to the eighth cranial nerve, the vestibulocochlear nerve, which is responsible for hearing and balance.
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In this article, we shall look at the anatomy of the facial nerve — its anatomical course, functions and clinical correlations. The facial nerve is associated with the derivatives of the second pharyngeal arch :. The course of the facial nerve is very complex. There are many branches, which transmit a combination of sensory, motor and parasympathetic fibres. The nerve arises in the pons , an area of the brainstem.
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