Gross Anatomy USMLE Step 1 Practice Question
A 42-year-old woman with a geniculate ganglion lesion presents with severe xerophthalmia (BP 128/82, HR 88, RR 16, Temp 37°C, SpO2 98%). She reports marked dry eyes and decreased nasal mucosal secretions. Schirmer test shows <5mm wetting. Notably, taste sensation on the posterior third of the tongue remains intact. Her facial motor function is preserved. Which of the following nerve fibers were most likely interrupted?
Answer choices
- ALesser petrosal nerve
- BGlossopharyngeal nerve
- CChorda tympani
- DHypoglossal nerve
- EGreater petrosal nerveCorrect answer
- FLacrimal branch of ophthalmic nerve (V1)
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