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

plural of auricularis posterior

(anatomy) A muscle that arises from the mastoid process of the temporal bone, inserts into the cranial surface of the concha of the external ear, and acts to retract the external ear.

(anatomy) Synonym of choana.

(anatomy) Alternative form of auricularis posterior.

plural of 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.

(anatomy) A small branch of the external carotid artery that supplies or gives off branches supplying the back of the ear and the adjacent region of the scalp, the middle ear, tympanic membrane, and mastoid cells.