Anatomy & Histology · single question
Which cranial nerve is NOT responsible for nociception (pain sensation) of the head?
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Correct answer: A. CN IV — Trochlear nerve
- A. Correct. CN IV (trochlear) is a purely motor nerve to the superior oblique muscle and carries no nociceptive fibers.
- B. CN V (trigeminal) is the principal nerve responsible for facial/head nociception.
- C. CN VII (facial) carries some sensory fibers in addition to motor function.
- D. CN X (vagus) carries sensory/nociceptive fibers from the larynx, pharynx, and parts of the ear.
Note: Pain-transmitting cranial nerves: CN V (trigeminal), CN VII (facial), CN X (vagus). CN IV does not.
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