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Anatomy & Histology · single question

Taste sensation from the posterior one-third of the tongue is carried by which nerve?

  1. Glossopharyngeal nerve (CN IX)
  2. Chorda tympani branch of the facial nerve (CN VII)
  3. Lingual nerve (CN V3)
  4. Hypoglossal nerve (CN XII)
Show answer and explanation

Correct answer: A. Glossopharyngeal nerve (CN IX)

  • A. Correct. The glossopharyngeal nerve (CN IX) provides BOTH taste and general sensation to the posterior one-third of the tongue.
  • B. Chorda tympani (CN VII) carries taste from the anterior two-thirds.
  • C. The lingual nerve carries general sensation (not taste) from the anterior two-thirds.
  • D. CN XII is motor to the tongue muscles and carries no taste.

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