Sensory branch facial nerve






Facial Nerve










The facial nerve is the seventh cranial nerve, or simply CN VII. It emerges from the pons of the From the brain stem, the motor and sensory parts of the facial nerve join together and traverse the posterior cranial fossa before entering the Distal to stylomastoid foramen, the following nerves branch off the facial nerve.




Facial Nerve Location and Origin


Description:The facial nerve supplies motor and sensory innervation to the muscles formed by the second pharyngeal arch, including the muscles of facial expression , the posterior belly of the digastric, stylohyoid and stapedius. As the nerves swell, it causes a pressure to be built on the facial nerve, causing damage or injury to it. Parasympathetic innervation serves to increase the flow of saliva from these glands. At the tip of tragal cartilage where the nerve is 1cm deep and inferior At the posterior belly of digastric by tracing this backwards to the tympanic plate the nerve can be found between these two structures By locating the posterior facial vein at the inferior aspect of the gland where the marginal branch would be seen crossing it. Paralysis of the facial nerve, causing weakness and loss of function of the muscles it serves, results in facial paralysis. Ten cadaveric temporal bone dissections with photographic documentation, two clinical cases, and histologic examination of a candidate nerve fiber were collected. It joins the rest of the facial nerve via the canaliculus for chorda tympani.

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Views: 2866 Date: 2018-08-21 Favorited: 67 favorites

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