Main Model
Superior thyroid artery
Superior thyroid artery, the most inferior of the three anterior branches of the external carotid artery, runs antero-inferiorly deep to the infrahyoid muscles to reach the thyroid gland. In addition to supplying this gland, it gives off branches to the infrahyoid muscles and sternocleidomastoid (SCM) muscle and gives rise to the superior laryngeal artery, supplying the larynx.