(anatomy) An artery that arises from the basilar artery just before it divides to form the posterior cerebral arteries and supplies or gives off branches supplying the superior part of the cerebellum, midbrain, pineal gland, and choroid plexus of the third ventricle.

(anatomy) An unpaired artery that is formed by the union of the two vertebral arteries, runs forward within the skull just under the pons, divides into the two posterior cerebral arteries, and supplies the pons, cerebellum, posterior part of the cerebrum, and the inner ear.

(anatomy) A large branch of the subclavian artery that ascends through the foramina in the transverse processes of each of the cervical vertebrae except the last one or two, enters the cranium through the foramen magnum, and unites with the corresponding artery of the opposite side to form the basilar artery.

(anatomy) A long slender artery that arises from the basilar artery or one of its branches, accompanies the vestibulocochlear nerve through the internal auditory canal, and is distributed to the inner ear.

(anatomy) Any of the several arteries supplying blood to the meninges of the brain and neighboring structures.

(anatomy) A single unpaired artery that is formed by the anastomosis of a branch of the vertebral artery on each side and that descends in the anterior median fissure of the spinal cord.

(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) Any of three arteries that supply the spinal cord and its membranes and adjacent structures.

(anatomy) Synonym of inferior alveolar artery.

(anatomy) Synonym of inferior alveolar artery.