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Posterior Division of Internal Iliac Artery
Cardiovascular System

Posterior Division of Internal Iliac Artery

Divisio posterior arteriae iliacae internae

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Quick 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.

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The posterior division arises from the internal iliac artery within the pelvic cavity.


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 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.

Learn more about this topic from other Elsevier products

Internal Iliac Artery

ScienceDirect image

The internal iliac artery (IIA) is a branch of common iliac artery, and it divides into the anterior and posterior divisions.

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