50-year-old man presents to the speech therapist complaining of dryness of the mouth. The therapist performs a swallowing study and, on examination, finds that the man has a lack of salivary secretion from the submandibular gland. This indicates a lesion of which of the following nervous structures?

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Vikas Bhardwaj
Medical Technologist, AIIMS New Delhi
Updated: Apr 14, 2026