posterior cricoarytenoid muscle

muscles of the larynx

The posterior cricoarytenoid muscles, of which there is a pair within the larynx, are the only muscles that abduct – in other words, open the space between – the vocal folds. They arise from the lamina (plate) of the cricoid cartilage and insert into the muscular process of the arytenoid cartilages.


See also abduction and adduction of vocal folds.