What action does the cricothyroid muscle perform?

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Multiple Choice

What action does the cricothyroid muscle perform?

Explanation:
The cricothyroid muscle tunes voice by changing how stretched the vocal folds are. It attaches from the cricoid to the thyroid cartilage, and when it contracts it tilts the thyroid cartilage forward and downward relative to the cricoid. This forward-downward tilt lengthens the vocal folds and increases their tension, which raises pitch. That’s why the correct description is lengthening the vocal folds by pulling the thyroid cartilage down and forward. The other ideas describe shortening or moving structures in directions that don’t produce the same effect on vocal fold length and tension.

The cricothyroid muscle tunes voice by changing how stretched the vocal folds are. It attaches from the cricoid to the thyroid cartilage, and when it contracts it tilts the thyroid cartilage forward and downward relative to the cricoid. This forward-downward tilt lengthens the vocal folds and increases their tension, which raises pitch.

That’s why the correct description is lengthening the vocal folds by pulling the thyroid cartilage down and forward. The other ideas describe shortening or moving structures in directions that don’t produce the same effect on vocal fold length and tension.

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