Iliolumbar artery
Encyclopedia
The iliolumbar artery is the first branch of the posterior trunk of the internal iliac artery
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and the external iliac artery
and vein, to the medial border of the psoas major, behind which it divides into:
Internal iliac artery
The internal iliac artery is the main artery of the pelvis.-Structure:The internal iliac artery supplies the walls and viscera of the pelvis, the buttock, the reproductive organs, and the medial compartment of the thigh...
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Course
The iliolumbar artery turns upward behind the obturator nerveObturator nerve
The obturator nerve in human anatomy arises from the ventral divisions of the second, third, and fourth lumbar nerves; the branch from the third is the largest, while that from the second is often very small.-Path:...
and the external iliac artery
External iliac artery
The external iliac arteries are two major arteries which bifurcate off the common iliac arteries anterior to the sacroiliac joint of the pelvis. They proceed anterior and inferior along the medial border of the psoas major muscles...
and vein, to the medial border of the psoas major, behind which it divides into:
- Lumbar branch of iliolumbar arteryLumbar branch of iliolumbar arteryThe lumbar branch of the iliolumbar artery supplies the psoas major and quadratus lumborum, anastomoses with the last lumbar artery, and sends a small spinal branch through the intervertebral foramen between the last lumbar vertebra and the sacrum, into the vertebral canal to supply the cauda...
- Iliac branch of iliolumbar arteryIliac branch of iliolumbar arteryThe iliac branch of the iliolumbar artery descends to supply the iliacus muscle; some offsets, running between the muscle and the bone, anastomose with the iliac branches of the obturator artery; one of these enters an oblique canal to supply the bone, while others run along the crest of the...
