posterior spinal artery

posterior spinal artery (plural posterior spinal arteries)

1. (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.

   Coordinate term: anterior spinal artery

• basilar artery
• posterior inferior cerebellar artery

• “spinal artery”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.