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Anatomy & Histology · single question

Injury to the lingual nerve would be expected to cause all of the following EXCEPT:

  1. Loss of taste from the anterior two-thirds of the tongue
  2. Loss of general (touch) sensation of the tongue
  3. Loss of motor function of the tongue
  4. Altered sensation of the floor of the mouth
Show answer and explanation

Correct answer: C. Loss of motor function of the tongue

  • A. Taste from the anterior 2/3 travels with the chorda tympani 'hitchhiking' on the lingual nerve.
  • B. General somatic sensation of the anterior tongue is lingual-nerve mediated.
  • C. Correct (the EXCEPTION). Tongue MOTOR function is supplied by the hypoglossal nerve (CN XII), not the lingual nerve.
  • D. Floor-of-mouth sensation is also lingual-nerve territory.

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