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Cranial nerve IX - the Glossopharyngeal nerve


Signs and Symptoms of Lesions


Loss of gag reflex, slight swallowing difficulty, loss of taste in the posterior third of the tongue, uvula deviated to the unaffected side, pharynx, tonsils, fauces, and back of tongue have loss of sensation; when saying “ah” there is a loss of constriction of the posterior pharynx, increased saliva, involuntary rapid eye movement and/or tachycardia.


Glossopharyngeal Nerve Test


Sensation may be determined by making gloved contact on the tongue and/or pharynx.  The gag reflex should be performed to both sides.



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