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Medical Term:

great segmental medullary artery


Definition: largest of the medullary arteries that supply the spinal cord by anastomosing with the anterior (longitudinal) spinal artery; it arises from a lower intercostal or upper lumbar artery (on the left side about 65% of the time) supplying most of the blood to the lower two thirds of the anterior spinal artery.

See: medullary arteries of brain

Synonym(s): arteria radicularis magna, artery of Adamkiewicz, great anastomotic artery3, great radicular artery

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.