🏥 USMLE Exam Prep

Damage to the oculomotor nerve (CN III) would directly affect which of the following functions?

A Pupillary constriction
B Lateral gaze
C Sensation of the face
D Hearing

✓ Correct Answer: Option A

The oculomotor nerve (CN III) innervates the sphincter pupillae muscle, which is responsible for pupillary constriction. Damage to this nerve causes impaired pupillary light reflex and mydriasis.

💡 Why is A) the correct answer?

The correct answer to the question "Damage to the oculomotor nerve (CN III) would directly affect which of the following functions?" is Option A: Pupillary constriction.

The other options — B) Lateral gaze, C) Sensation of the face, D) Hearing — are incorrect for this USMLE Exam Prep question. As explained above: The oculomotor nerve (CN III) innervates the sphincter pupillae muscle, which is responsible for pupillary constriction. Damage to this nerve causes impaired pupillary light reflex and mydriasis.

📚 About This USMLE Exam Prep Practice Question

This 1-level USMLE Exam Prep question from the Step 1 – Basic Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free USMLE Exam Prep practice test or use flashcards for spaced repetition review.

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