A 17-year-old boy undergoes middle ear surgery for cholesteatoma. Postoperatively, he presents with BP 118/76, HR 88, RR 16, temp 37.2°C, SpO2 98%. He reports reduced taste on the anterior two-thirds of the tongue and dry mouth. Facial expression remains intact. CT imaging confirms cholesteatoma erosion into the temporal bone. Salivary flow testing shows decreased production. Which nerve was most likely injured during surgery?
- A)Lesser petrosal nerve
- B)Greater petrosal nerve
- C)Lingual nerve
- D)Chorda tympaniGABARITO
- E)Hypoglossal nerve
Explicação
Chorda tympani travels through the middle ear and carries taste from the anterior two thirds of the tongue plus parasympathetic fibers to the submandibular and sublingual glands. Loss of these functions with intact facial expression localizes to this branch ra... Ver explicação completa e trilha adaptativa →