Lumbar artery

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Abdominal aorta from the dorsal side with stumps of the lumbar arteries

The arteriae lumbales (lat. For "lumbar arteries ", singular arteria lumbalis ) are arteries of the trunk in the area of ​​the loin . They arise segmentally and in pairs from the abdominal aorta at the level of the respective lumbar vertebrae . The number of lumbar arteries varies among mammal species. As a rule, five such pairs are formed in humans, with the last already arising from the median sacral artery .

Each lumbar artery divides into a branch of the spinal cord ( ramus spinalis ), which runs through the intervertebral foramen into the spinal canal and supplies the spinal cord , and a dorsal branch ( ramus dorsalis ) to supply the autochthonous back muscles in the loin area. The Rami spinales are connected to one another by a longitudinal anastomosis , the Arteria spinalis anterior (in animals called Arteria spinalis ventralis ).

literature

  • Uwe Gille: Cardiovascular and immune system, Angiologia. In: Franz-Viktor Salomon, Hans Geyer, Uwe Gille (Ed.): Anatomy for veterinary medicine. 2nd, revised and expanded edition. Enke, Stuttgart 2008, ISBN 978-3-8304-1075-1 , pp. 404-463.