Videos
Quizzes
Both
Posterior superior iliac spine
/images/vimeo_thumbnails/258801877/ncMqUp425tAP8bNfLM7UaA_overlay.jpg)
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine/MwerebX7AGEQfanSR1jMnA_GnxcG2ks7p_Spina_iliaca_posterior_superior_2.png "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Liene Znotina"){kind=logo}
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine-5/C7QpVpJI1iGcYSXNc95KEw_Posterior_superior_iliac_spine.jpg "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Liene Znotina"){kind=logo}
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine-2/icXmHEUZTkPpEN4Y2vjg_Posterior_superior_iliac_spine.png "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Liene Znotina"){kind=logo}
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine-3/tZLsxxgkQN1QsU88FGNAqA_Posterior_superior_iliac_spine_of_ilium_magni.png "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Irina Münstermann"){kind=logo}
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine-4/xGHndO0i6EeZGEYjm0kwA_Posterior_superior_iliac_spine_of_ilium_magni.png "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Irina Münstermann"){kind=logo}
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine-1/kyvXKf3WKXMfCtQm53NwiQ_Posterior_superior_iliac_spine__1_.png "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Paul Kim"){kind=logo}
:watermark(/images/watermark_only_413.png,0,0,0):watermark(/images/logo_url_sm.png,-10,-10,0):format(jpeg)/images/anatomy_term/posterior-superior-iliac-spine-6/1TdGdwcQz715OPS76sw_RackMultipart20220322-1599127-nsnwgj.png "Posterior superior iliac spine (Spina iliaca posterior superior); Image: Paul Kim"){kind=logo}
The posterior superior iliac spine (PSIS) is a bony projection of the ilium, located at the posterior end of the iliac crest, which spans between it and the anterior superior iliac spine (ASIS). Unlike the ASIS, the PSIS is not as easily palpable, however it is often represented superficially by a dimple (of Venus) above the medial gluteal region, located approximately 4cm lateral to the spinous process of the second sacral vertebra.
The PSIS serves as an attachment point for the multifidus muscle, as well as the posterior sacroiliac and sacrotuberous ligaments.
| Terminology |
English: Posterior superior iliac spine Latin: Spina iliaca posterior superior |
| Definition | Bony prominence of the ilium, marking the posterior end of the iliac crest |
| Function | Attachment for the multifidus muscle and the posterior sacroiliac and sacrotuberous ligaments |
Learn more about the bony pelvis with this study unit (and article):
:format(jpeg)/images/study_unit/bones-pelvis-femur/iDuO27H7Hlpmy6i70OvDw_Pelvis_PosteriorView_Thumbnail_09.png)
:format(jpeg)/images/article/the-pelvis/HIPfUpu9ZStwr66jmk7hw_Bony_pelvis__Pelvis_ossea_.png)
Posterior superior iliac spine: want to learn more about it?
Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.
What do you prefer to learn with?
“I would honestly say that Kenhub cut my study time in half.”
–
Read more.
Kim Bengochea, Regis University, Denver
