Facial Nerve Research Paper

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The facial nerve is the seventh paired cranial nerve. It is a mixed nerve. Its conveys the sensation of taste and is motor to all the skeletal muscles derived from the second pharyngeal arch. The nerve is secreto-motor to the lacrimal, submandibular and sublingual salivary glands. Parts of facial nerve: The facial nerve consists of two parts: the facial nerve proper and the nervus intermedius. The facial nerve proper is the motor root of the facial nerve consisting of the axons of SVE (branchiomotor) neurons whose cell bodies reside in the facial nucleus. This nucleus contains subnuclei, each supplying specific muscles or groups of muscles. The nervus intermedius is sometimes referred to as the “sensory root,” which is a misnomer since in…show more content…
Motor: Innervates the muscles of facial expression, the posterior belly of the digastric, the stylohyoid and the stapedius muscles. The first motor branch arises within the facial canal; the nerve to stapedius. The nerve passes through the pyramidal eminence to supply the stapedius muscle in the middle ear. Between the stylomastoid foramen, and the parotid gland, three more motor branches are given off: Posterior auricular nerve ascends in front of the mastoid process, and innervates the intrinsic and extrinsic muscles of the outer ear. It also supplies the occipital part of the occipitofrontalis muscle. Nerve to the posterior belly of the digastric muscle innervates the posterior belly of the digastric muscle (a suprahyoid muscle of the neck). It is responsible for raising the hyoid bone. Nerve to the stylohyoid muscle innervates the stylohyoid muscle (a suprahyoid muscle of the neck). It is responsible for raising the hyoid bone. Within the parotid gland, the facial nerve terminates by bifurcating into five motor branches. These innervate the muscles of facial expression: Temporal branch innervates the frontalis, orbicularis oculi and corrugator

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