Lumbar arteries
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89681612
2006-11-23T17:56:39Z
Arcadian
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{{Infobox Artery |
Name = {{PAGENAME}} |
Latin = arteriae lumbales |
GraySubject = 154 |
GrayPage = 612 |
Image = Gray585.png |
Caption = The veins of the right half of the male pelvis. (Lumbar arteries not labeled, but third lumbar vein labeled at center top.) |
Image2 = |
Caption2 = |
BranchFrom = [[abdominal aorta]] |
BranchTo = |
Vein = [[Lumbar veins]] |
Supplies = [[Quadratus lumborum muscle|Quadratus lumborum]] |
MeshName = |
MeshNumber = |
DorlandsPre = a_61 |
DorlandsSuf = 12154932 |
}}
The '''lumbar arteries''' are in series with the [[Intercostal arteries|intercostals]].
They are usually four in number on either side, and arise from the back of the [[aorta]], opposite the bodies of the upper four [[lumbar vertebræ]].
A fifth pair, small in size, is occasionally present: they arise from the [[middle sacral artery]].
They run lateralward and backward on the bodies of the [[lumbar vertebræ]], behind the [[sympathetic trunk]], to the intervals between the adjacent [[transverse processes]], and are then continued into the abdominal wall.
The arteries of the right side pass behind the [[inferior vena cava]], and the upper two on each side run behind the corresponding [[crus]] of the [[diaphragm (anatomy)|diaphragm]].
The arteries of both sides pass beneath the [[tendinous arches]] which give origin to the [[Psoas major]], and are then continued behind this muscle and the [[lumbar plexus]].
They now cross the [[Quadratus lumborum]], the upper three arteries running behind, the last usually in front of the muscle.
At the lateral border of the Quadratus lumborum they pierce the posterior aponeurosis of the [[Transversus abdominis]] and are carried forward between this muscle and the [[Obliquus internus]].
They anastomose with the [[lower intercostal]], the [[subcostal]], the [[iliolumbar]], the [[deep iliac circumflex]], and the [[inferior epigastric]] arteries.
==Additional images==
<gallery>
Image:Gray1120.png|The relations of the viscera and large vessels of the abdomen.
</gallery>
==External links==
* {{eMedicineDictionary|lumbar+arteries}}
* {{SUNYAnatomyLabs|40|11|02|01}} - "Branches of the Abdominal Aorta"
* {{UMichAtlas|abdo_wall75}} - "The Abdominal Aorta"
* {{SUNYAnatomyFigs|40|05|07}} - "Parietal and visceral branches of the abdominal aorta."
{{Gray's}}
{{circulatory-stub}}
{{Arteries of thorax and abdomen}}