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Median Sacral Artery
Cardiovascular System

Median Sacral Artery

Arteria sacralis mediana

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Quick Facts

Origin: Abdominal Aorta.

Course: Inferiorly along the sacrum and coccyx.

Branches: Right and left lateral sacral branches, rectal branches, and arteriae lumbalis imae.

Supplied Structures: Sacrum, coccyx, rectum, and anal canal.

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Origin

The median sacral artery originates as a slender vessel, approximately 1 cm above the bifurcation of the abdominal aorta. Occasionally, it arises from a branch of one of the lumbar arteries or from one of the common iliac arteries.

Course

The median sacral artery descends along the lower lumbar vertebrae (L4-L5), the sacrum, and the coccyx as far as the distal tip of the coccyx.

Branches

The median sacral artery anastomosis with the lateral sacral arteries. The rectal branches are very small vessels that extend into rectal fascia and the mesorectum.

Supplied Structures

The branches of the median sacral artery supply the sacrum, the coccyx, and give a small contribution to the rectum and anal canal. In tail-bearing mammals, this artery is much larger and contributes to the caudal vascular supply.

Learn more about this topic from other Elsevier products

Artery

ScienceDirect image

When the artery is occluded blood is forced through the collateral vessels, drastically increasing fluid shear stress and triggering an inflammatory response which drives vessel remodeling.

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Complete Anatomy

The world's most advanced 3D anatomy platform

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