Ptosis may occur due to damage to_______________?
Correct answer: B. Occulomotor
- A. Trochlear nerve
- B. Occulomotor
- C. Trigeminal nerve
- D. Superior oblique muscle
Explanation
Most levator palpebrae fibres are supplied by the oculomotor nerve, so its injury produces ptosis. Trochlear injury causes vertical diplopia, not the characteristic complete ptosis of III palsy.
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