Ala of sacrum

Ala of sacrum

Base of sacrum seen from above (ala labeled at center left)
Details
Identifiers
Latin Ala ossis sacri
Dorlands
/Elsevier
a_21/12118083
TA A02.2.05.004
FMA 32439

Anatomical terminology

The ala of sacrum (plural alae) is a large triangular surface on either side of the body of the base of the sacrum. The alae support the psoas major muscles and the lumbosacral trunk which connects the lumbar plexus with the sacral plexus. In the articulated pelvis the alae are continuous with the iliac fossa.

It is slightly concave from side to side, and convex from the back and gives attachment to a few of the fibers of the iliacus.

The posterior quarter of the ala represents the transverse process, and its anterior three-quarters the costal process of the first sacral segment.

It serves as part of the border of the pelvic brim. The alae also form the base of the lumbosacral triangle.

Structures attached to the ala:

Structures in relation:

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links


This article is issued from Wikipedia - version of the Sunday, June 21, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.