Facial nerve exits
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Facial Nerve Quiz Flashcards
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Cranial nerve review table
The facial nerve is one of the twelve pairs of cranial nerves in the peripheral nervous system. Click To View Large Image. Parasympathetic innervation in the head and neck promotes the production of mucous, tears, and saliva and is counter regulated by sympathetic innervation. The postganglionic fibers then travel a short distance to innervate their two final targets. 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. Like all nerves, the facial nerve is made of thousands of individual neurons bundled together with connective tissue and blood vessels. Destination of afferent taste fibers The fibers from the superior salivary nucleus and the NTS converge as they leave the cerebellopontine angle and enter the internal acoustic meatus IAC. The chorda tympani exits the cranium via the petrotympanic fissure and enters the infratemporal fossa. The chorda tympani travels superiolaterally and enters the middle ear, arches across pars flaccida medial to the superior portion of the handle of malleus, and traverses above the insertion of tensor tympani. Cranial nerve seven CN VII is responsible for both efferent and afferent modalities in the head and neck including. Origin of parasympathetic fibers Nucleus tractus solitarius NTS. Superior salivary nucleus.
Feb 15, Soon after exiting the stylomastoid foramen, the facial nerve gives rise to three motor nerves: Posterior auricular nerve (occipitofrontalis muscle).
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