Sacrotuberous ligament

Sacrotuberous ligament

Infobox Ligament
Name = Sacrotuberous ligament
Latin = ligamentum sacrotuberale
GraySubject = 80
GrayPage = 309

Caption = Articulations of pelvis, anterior view, with greater sciatic foramen (labeled in red) and its boundaries.

Caption2 = Articulations of pelvis. Posterior view.
From = sacrum
To = tuberosity of the ischium
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The sacrotuberous ligament (great or posterior sacrosciatic ligament) is situated at the lower and back part of the pelvis. It is flat, and triangular in form; narrower in the middle than at the ends.

It runs from the sacrum (the lower transverse sacral tubercles, the inferior margins sacrum and the upper coccyx [ Marios Loukas,Robert G Louis Jr, Barry Hallner, Ankmalika A Gupta and Dorothy White. (2006) "Anatomical and surgical considerations of the sacrotuberous ligament and its relevance in pudendal nerve entrapment syndrome" Surg Radiol Anat 28(2): 163-169] ) to the tuberosity of the ischium.

The membranous falciform process of the sacrotuberous ligament was found to be absent in 13% of cadavers. When present it extends towards the ischioanal fossa travelling along the ischial ramus and fusing with the obturator fascia.

The sacrotuberous ligament contains the coccygeal branch of the inferior gluteal artery.

The lower border of the ligament was found to be directly continuous with the tendon of origin of the long head of the Biceps femoris in approximately 50% of subjects [Vleeming, A., R. Stoeckart, et al. (1989). "The sacrotuberous ligament: a conceptual approach to its dynamic role in stabilizing the sacroiliac joint." Clinical Biomechanics 4(4): 200-203.] . Biceps femoris could therefore act to stabilise the sacroiliac joint via the sacrotuberous ligament.


External links

* - "Deep muscles of the gluteal region with gluteus medius and maximus muscles removed."
* - "Posterior view of the bones and ligaments of the hip joint."
* - "The Female Perineum"
* - "The Male Perineum and the Penis: Boundaries of the Ischioanal fossa"


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