plural of inferior rectus

(anatomy) A muscle of the pharynx that is the thickest of its three constrictors, arises from the surface and side of the cricoid and thyroid cartilages, inserts into the median line at the back of the pharynx, and acts to constrict part of the pharynx in swallowing.

(anatomy) A short extraocular muscle that arises from the orbital surface of the maxilla, is inserted slightly in front of and below the superior oblique muscle, and moves the eye upward and laterally.

(neuroanatomy) The lower and larger of the two sensory ganglia of the glossopharyngeal nerve.

plural of inferior ganglion

(anatomy) An artery that usually branches from the vertebral artery below its junction with the contralateral vertebral artery to form the basilar artery and that supplies much of the medulla oblongata, the inferior portion of the cerebellum, and part of the floor of the fourth ventricle.

(anatomy) An artery that arises from the basilar artery either alone or by a common trunk with the labyrinthine artery, divides into branches distributed to the anterior parts of the inferior surface of the cerebellum, and gives off a branch that anastomoses with the posterior inferior cerebellar artery.

(anatomy) Synonym of inferior alveolar artery.

(anatomy) A branch of the maxillary artery that is distributed to the mucous membrane of the mouth and through the mandibular canal to the teeth of the lower jaw.

(anatomy) One of two arteries supplying the thyroid gland and nearby structures at the front of the neck that branches from the thyrocervical trunk and that divides to form branches supplying the inferior portion of the thyroid gland and anastomosing with the superior thyroid artery or with a corresponding branch from the opposite side.