plural of auricularis posterior

(anatomy) Synonym of choana.

plural of posterior naris

(anatomy) A triangular region that is a landmark in the neck, has its apex above at the occipital bone, and is bounded in front by the sternocleidomastoid muscle, behind by the anterior margin of the trapezius, and inferiorly by the middle third of the clavicle.

plural of posterior mal

(anatomy, colloquial) Clipping of posterior malleolus.

(anatomy) A muscle arising from the transverse processes of the fourth to sixth cervical vertebrae, inserting on the outer surface of the second rib, and functioning to raise the second rib and to bend and slightly rotate the neck.

(anatomy) A muscle of the larynx that arises from the posterior surface of the lamina of the cricoid cartilage, inserts into the posterior of the process of the arytenoid cartilage, and widens the opening of the vocal cords.

(anatomy) Either of two arteries that occur one on each side of the circle of Willis and connect an internal carotid artery with a posterior cerebral artery.

(anatomy) Either of two arteries of which one arises from a vertebral artery on each side below the level at which the corresponding branch of the anterior spinal artery arises and which descend on the posterior lateral surface of the spinal cord along a line passing close to the entrance of the dorsal roots to the spinal cord.