has muscle antagonist posterior crico-arytenoid lateral crico-arytenoid The lateral cricoarytenoid (also anterior cricoarytenoid) muscles extend from the lateral cricoid cartilage to the ipsilateral arytenoid cartilage. By rotating the arytenoid cartilages medially, these muscles adduct the vocal cords and thereby close the rima glottidis, protecting the airway. (Their action is antagonistic to that of the posterior cricoarytenoid muscles. ) The lateral cricoarytenoid muscles receive innervation from the recurrent laryngeal branch of the vagus nerve (CN X). cricoarytaenoideus lateralis musculus cricoarytenoideus lateralis FMA:46579 lateral cricoarytenoid muscle cricoarytænoideus lateralis muscle lateral cricoarytenoid cricoarytænoideus lateralis SCTID:244813000 cricoarytaenoideus lateralis muscle UBERON:0008573 Wikipedia:Lateral_cricoarytenoid_muscle lateral cricoarytenoideus crico-arytenoid muscle