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Facial nerve face anatomy

The facial nerve is also known as the seventh cranial nerve CN7. This nerve performs two major functions. It conveys some sensory information from the tongue and the interior of the mouth. Specifically, CN7 serves about two-thirds of the tongue's tip. The nerve extends from the brain stem, at the pons and the medulla.
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The Facial Nerve (CN VII)

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The Facial Nerve (CN VII) - Course - Functions - TeachMeAnatomy

The facial nerve is one of the twelve pairs of cranial nerves in the peripheral nervous system. Nerve signals from the cranial nerve play important roles in sensing taste as well as controlling the muscles of the face, salivary glands, and lacrimal glands. The facial nerve is the seventh cranial nerve to exit the brain when counting from anterior to posterior. As the facial nerve passes through the temporal bone, several smaller nerves branch off from the main nerve, including the greater superficial petrosal nerve and the chorda tympani. After passing through the stylomastoid foramen, the facial nerve emerges just inferior to the ear and splits into several superficial branches. Like all nerves, the facial nerve is made of thousands of individual neurons bundled together with connective tissue and blood vessels.
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The Anatomy of the Facial Nerve

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The facial nerve and its branches regulate a number of functions of the mouth and face. Most of its divisions stimulate muscles that allow eyelids to open and close, as well as facial movements. This nerve also mediates the production of tears and saliva and perception of taste in the tongue, and receives some sensory input from the face as well.
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