Lateral sacral artery

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Artery: Lateral sacral artery
Lateral sacral artery labeled at center right.
The iliac veins. (Lateral sacral labeled at bottom left.)
Latin arteriae sacrales laterales
Gray's subject #155 621
Supplies Erector spinae, Piriformis muscle, Sacral canal
Source Internal iliac artery   
Vein Lateral sacral veins
/ Elsevier

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

The lateral sacral arteries arise from the posterior division of the internal iliac artery; there are usually two, a superior and an inferior.


The superior, of large size, passes medialward, and, after anastomosing with branches from the middle sacral, enters the first or second anterior sacral foramen, supplies branches to the contents of the sacral canal, and, escaping by the corresponding posterior sacral foramen, is distributed to the skin and muscles on the dorsum of the sacrum, anastomosing with the superior gluteal.


The inferior runs obliquely across the front of the piriformis and the sacral nerves to the medial side of the anterior sacral foramina, descends on the front of the sacrum, and anastomoses over the coccyx with the middle sacral and opposite lateral sacral artery.

In its course it gives off branches, which enter the anterior sacral foramina; these, after supplying the contents of the sacral canal, escapes by the posterior sacral foramina, and are distributed to the muscles and skin on the dorsal surface of the sacrum, anastomosing with the gluteal arteries.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.