In this article, we shall look at the anatomical course of the nerve, and the motor, sensory and parasympathetic functions of its terminal branches. 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.
Facial Nerve (Cranial Nerve VII) -- General Information | Iowa Head and Neck Protocols
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.
Iowa Head and Neck Protocols
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.
Skip to main content. It is important to note that while the facial nerve branches within the parotid gland, it does not provide autonomic innervation to the gland This is supplied by the auriculotemporal division of V3. CN VII is often tested during physical examination and its function can be reported using the House-Brackmann Scale Hint: 1 is normal, 6 is completely non-functional. Parasympathetic Innervation: CN VII provides pre ganglionic parasympathetic innervation to: Submandibular glands Sublingual glands Lacrimal glands Mucous membranes of the nose, palate, and pharynx It is important to note that all of the post ganglionic parasympathetic nerve fibers from CN VII are actually carried to their ultimate targets via divisions of CN V.