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Neuro II- CN VII

Thomadaki Fall 2010

Origin of CN VII - Facial nucleus [motor]/ lower pons facial colliculus - Nucleus of solitary tract [taste & parasympathetic] - Superior salivatory nucleus [parasympathetic]
What forms the Nervous Intermedius? Preganglionic parasympathetic fibers from facial nuclei + central axons of geniculate ganglion (taste from ant 2/3 of tongue)
Exit of CN VII Cerebellopontine angle
Peripheral branches of CN VII Temporal, Zygomatic, Buccal, Marginal mandibular, Cervical
Motor function of CN VII Muscles of facial expression, auricular muscles, stapedius, posterior belly of digastric, stylohoid muscles
Sensory function of CN VII Taste from anterior 2/3 of tongue via chorda tympani (peripheral axons of geniculate ganglion) which joins the lingual nerve (V3)
Parasympathetic function of CN VII Para to lacrimal, serous & mucous glands of nasopharynx & the submandibular, sublingual salivary glands (also via chorda tympani)
Exam for CN VII Facial expression movements & taste
Lesion to CN VII Bell's Palsy LMN type of facial paralysis [hyperacousis, unilateral facial paralysis w/ inability to wring the forehead, raise eyebrow, shut eye tightly, smile; tear flow over sagging lower eyelid & loss of taste from anterior 2/3 of tongue
CN VII enters the _________ & ultimately exits the skull via the ________ internal acoustic meatus; stylomastoid foramen
Created by: mrw2013