The iliolumbar artery is the first branch of the posterior trunk of the internal iliac artery .
Structure
The iliolumbar artery is the first branch of the posterior trunk of the internal iliac artery .[1] obturator nerve and the external iliac artery and vein, to the medial border of the psoas major muscle , behind which it divides into:
Anastomoses
1. Last lumbar→iliolumbar
2. Lateral sacral↔lateral sacral
3. Middle sacral→lateral sacral
4. Superior hemorrhoidal→middle hemorrhoidal
5. Medial femoral circumflex→inferior gluteal
6. Medial femoral circumflex↔obturator
7. Lateral femoral circumflex→superior gluteal
8. Deep iliac circumflex→superior gluteal
9. Deep iliac circumflex→external iliac
10. Last lumbar→superior gluteal
11. Last lumbar→deep iliac circumflex
12. Iliolumbar→deep iliac circumflex.[2]
This article incorporates text in the public domain from page 621 of the 20th edition of Gray's Anatomy (1918)
^ Paterson-Brown, Sara (2010-01-01), Bennett, Phillip; Williamson, Catherine (eds.), "Chapter Five - Applied anatomy" , Basic Science in Obstetrics and Gynaecology (Fourth Edition) , Churchill Livingstone, pp. 57–95, doi :10.1016/b978-0-443-10281-3.00009-9 , ISBN 978-0-443-10281-3 , retrieved 2021-02-07 ^ Chait, A; Moltz, A; Nelson, JH (February 1968). "The collateral arterial circulation in the pelvis. An angiographic study". American Journal of Roentgenology . 102 (2): 392–400. doi :10.2214/ajr.102.2.392 . PMID 5635691 . 
