Facial nerve upper motor
It is accompanied by the parasympathetic fibers of the nervus intermedius, which is responsible for tearing, salivation and taste. Normal blink and eyelid closure Grade II. Brain and spinal cord : neural tracts and fasciculi. Mullen MT. In addition to corneal exposure, patients may suffer from epiphora due to lower eyelid ectropion and poor tear pumping mechanism, reflex tearing from dry eye or aberrant innervation of the lacrimal gland, facial synkinetic movements such as blinking or eyelid retraction with oral movement, and poor peri-ocular cosmesis The nucleus is situated in the caudal portion of the ventrolateral pontine tegmentum.
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Muscles of Facial Expression and Taste (CN VII)
Nucleus ambiguus Dorsal nucleus of vagus nerve Solitary nucleus. Views Read Edit View history. Authority control TA98 : A The nerve to stapedius provides motor innervation for the stapedius muscle in middle ear. Greater petrosal pterygopalatine ganglion Nerve to the stapedius Chorda tympani lingual nerve submandibular ganglion. Lower motor neuron lesions can result in a CN VII palsy Bell's palsy is the idiopathic form of facial nerve palsy , manifested as both upper and lower facial weakness on the same side of the lesion.
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Anatomical terms of neuroanatomy [ edit on Wikidata ]. The nerve to stapedius provides motor innervation for the stapedius muscle in middle ear. Parasympathetic innervation serves to increase the flow of saliva from these glands. Hidden categories: Articles with short description Short description matches Wikidata All articles with unsourced statements Articles with unsourced statements from January Articles with unsourced statements from August Commons category link is on Wikidata Wikipedia articles with TA98 identifiers. The efferent arc occurs via the facial nerve.
Facial nerve
Description: Corneal reflex. The afferent arc is mediated by the general sensory afferents of the trigeminal nerve. Persaud; Mark G. The facial nerve also supplies a small amount of afferent innervation to the oropharynx below the palatine tonsil. The labyrinthine segment is very short, and ends where the facial nerve forms a bend known as the geniculum of the facial nerve genu meaning knee , which contains the geniculate ganglion for sensory nerve bodies.
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Date: 22.05.2019
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