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Anatomy · Head and neck
Sample itemWhich cranial nerve supplies facial-expression muscles?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Facial nerve
The facial nerve supplies the muscles of facial expression, so injury can cause weakness of brow elevation, eye closure, and mouth movement.
Option by option
A. Facial nerve (correct)
Correct: facial nerve innervates facial-expression muscles.
B. Trigeminal nerve
Trigeminal nerve supplies mastication and facial sensation.
C. Hypoglossal nerve
Hypoglossal nerve controls tongue muscles.
D. Glossopharyngeal nerve
Glossopharyngeal nerve contributes to pharyngeal sensory functions.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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