Posterior superior iliac spine

The posterior border of the ala of sacrum, shorter than the anterior, also presents two projections separated by a notch, the posterior superior iliac spine and the posterior inferior iliac spine. The posterior superior iliac spine serves for the attachment of the oblique portion of the posterior sacroiliac ligaments and the multifidus.

Posterior superior iliac spine
Right hip bone. External surface. (Posterior superior spine labeled at center left.)
Surface anatomy of the back. Posterior superior iliac spine lies in the marking of S2.
Details
Identifiers
Latin	spina iliaca posterior superior
TA98	A02.5.01.113
TA2	1329
FMA	49468
Anatomical terms of bone [edit on Wikidata]

See also

• Dimples of Venus

References

This article incorporates text in the public domain from page 234 of the 20th edition of Gray's Anatomy (1918)

External links

• Atlas image: back_bone4 at the University of Michigan Health System – "The Sacral and Coccygeal Vertebrae, Posterior View"
• pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University)