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Neuro II - CN IX

Thomadaki Fall 2010

What are the nuclei of CN IX? - Nucleus of solitary tract [taste & autonomic] / medulla - Nucleus ambiguus [motor] / medulla - Inferior salivatory nucleus [parasympathetic]/ pons
Where does CN IX exit? Post-olivary sulcus, medulla
What is the motor function of CN IX? Motor to stylopharyngeus muscle
What are the sensory functions of CN IX? - Taste fibers from posterior 1/3 of tongue - Sensory to middle ear, tympanic cavity, Eustachian tubes, tonsils, naso-oro-pharynx, ubula, soft palate, posterior 1/3 of tongue
What are the parasympathetic functions of CN IX? - Parasympathetic to the parotid gland via the otic ganglion - Afferent parasympathetic fibers from the carotid sinus/body
What is the exam for CN IX? Taste & general sensation of the posterior 1/3 of the tongue & oropharynx, sensory part of gag reflex.
what symptoms will be present with a lesion to CN IX? - Aberrations in BP - sometimes pain (glossopharyngel neuralgia) - Loss of sensation in the naso-oro-pharyngeal area - Absent gag reflex
Created by: mrw2013