The posterior cricoarytenoid is one of the muscles of the vocal folds.
On each side, it arises from the posterior surface of the lamina of the cricoid cartilage. It inserts into the ipsilateral muscular process of the arytenoid cartilage.
It has two actions on the arytenoid cartilages to open the rima glottidis by abducting the vocal folds:
The posterior cricoarytenoid muscle is innervated by the recurrent laryngeal nerve.
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