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ENT · Laryngology
Sample itemWhich intrinsic laryngeal muscle is the only abductor of the vocal folds?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Posterior cricoarytenoid
Posterior cricoarytenoid opens the rima glottidis by abducting vocal folds, so bilateral dysfunction can severely compromise the airway.
Option by option
A. Cricothyroid
Cricothyroid tenses vocal folds to alter pitch.
B. Lateral cricoarytenoid
Lateral cricoarytenoid adducts the vocal folds.
C. Posterior cricoarytenoid (correct)
Correct: posterior cricoarytenoid is the sole vocal-fold abductor.
D. Thyroarytenoid
Thyroarytenoid primarily relaxes and adducts vocal folds.
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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