Posterior Division of Internal Iliac Artery
Divisio posterior arteriae iliacae internae
Read moreQuick Facts
Origin: The internal iliac artery.
Course: Inferiorly and posteriorly.
Branches: Iliolumbar, lateral sacral, and superior gluteal artery.
Supplied Structures: Pelvic cavity, lumbar vertebrae, sacrum, and gluteal region.
Origin
The posterior division arises from the internal iliac artery within the pelvic cavity.
Course
It travels inferiorly and posteriorly along the pelvic wall. It terminates close to the lumbosacral trunk where it continues as the superior gluteal artery.
Branches
Branches of the iliolumbar artery travel superiorly along the ilium and lumbar vertebrae.
The lateral sacral arteries descend on the pelvic surface of the sacrum, giving rise to branches that enter the anterior sacral foramina.
The superior gluteal artery exits the pelvic cavity via the greater sciatic foramen superior to the piriformis muscle.
Supplied Structures
The posterior division of the internal iliac artery supplies portions of the pelvic wall, lumbar region, and contributes to the vasculature of the gluteal region.
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Internal Iliac Artery
The internal iliac artery (IIA) is a branch of common iliac artery, and it divides into the anterior and posterior divisions.
