Anatomy & Histology · single question
Which of these cranial nerves does NOT transmit nociceptive (pain) fibers to the brain?
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Correct answer: A. CN IV (Trochlear)
- A. Correct (the exception). CN IV (trochlear) is a purely motor nerve controlling the superior oblique eye muscle and does not carry nociceptive/sensory pain fibers.
- B. CN V (trigeminal) is the primary sensory nerve for facial/oral pain.
- C. CN X (vagus) carries some sensory/nociceptive fibers from the larynx/pharynx/ear.
- D. CN VII (facial) carries some sensory fibers (taste, and minor cutaneous sensation from the external ear) in addition to its motor function.
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