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NBME 20 Answers

nbme20/Block 1/Question#22 (24.7 difficulty score)
A 38-year-old woman comes to the physician ...

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submitted by toxoplasmabartonella(11),

CN X carries efferent to palate. CN IX carries afferent from palate.

submitted by hmorela(14),
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yWh si it htta teh anrwes 'tnsi laso aplgoohgeyrslnsa seicn you stet NC IX yb yiangs h""A a?ols elaseP !hple ahTn!s!k

sinforslide  I believe that the arrow pointed to the uvula; uvular deviation would be testing for CN X palsy. CN IX's only motor innervation is the stylopharyngeus. (Not testing for gag reflex!) +10  

submitted by fatboyslim(39),

Glossopharyngeal nerve function: - Taste and sensation from posterior 1/3 of tongue - Swallowing - Salivation (parotid gland) - Monitoring carotid body and sinus chemo- and baroreceptors - Elevation of pharynx/larynx (stylopharyngeus)