aryepiglottic muscle aryepiglottic muscle the aryepiglottic muscle or aryepiglotticus muscle is an intrinsic muscle of the larynx. aryepiglottic musclesagittal section of the larynx and upper part of the trachea (arytenoideus visible at center right)detailsoriginapex of arytenoidinsertionlateral border of epiglottisarterylaryngeal branch of superior thyroid arterynerveinferior laryngeal nerve (from the vagus nerve)actionscloses the laryngeal inletidentifierslatinpars aryepiglottica musculi arytaenoidei obliqui, musculus aryepiglotticusta98a06.2.08.011ta22204fma46602anatomical terms of muscle the muscle originates from the muscular process of arytenoid cartilage and inserts to the aryepiglottic fold and lateral border of the epiglottis. the aryepiglottic muscle is innervated by the inferior laryngeal nerve, a branch of the recurrent laryngeal nerve (itself a branch of the vagus nerve). the muscle adducts arytenoid cartilages and acts as a sphincter on the laryngeal inlet. additional images aryepiglottic muscle