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Anatomy & Histology · single question

Infiltrating at the BASE of a lateral tongue lesion primarily anesthetizes which nerve?

  1. Hypoglossal nerve (CN XII)
  2. Chorda tympani
  3. Lingual nerve (CN V3)
  4. Glossopharyngeal nerve (CN IX)
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Correct answer: C. Lingual nerve (CN V3)

LINGUAL NERVE (branch of CN V3) provides general sensory innervation to the anterior 2/3 of tongue, floor of mouth, and lingual gingiva. CN IX = posterior 1/3 of tongue. CN XII = motor only.

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