Sacrospinous ligament

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Ligament: Sacrospinous ligament
Articulations of pelvis. Posterior view.
Nélaton’s line and Bryant’s triangle.
Latin	ligamentum sacrospinosum
Gray's	subject #80
From
To

The sacrospinous ligament (small or anterior sacrosciatic ligament) is thin, and triangular in form; it is attached by its apex to the ischial spine, and medially, by its broad base, to the lateral margins of the sacrum and coccyx, in front of the sacrotuberous ligament with which its fibers are intermingled.

Relations

It is in relation, anteriorly, with the Coccygeus muscle, to which it is closely connected; posteriorly, it is covered by the sacrotuberous ligament, and crossed by the internal pudendal vessels and nerve.

Its upper border forms the lower boundary of the greater sciatic foramen; its lower border, part of the margin of the lesser sciatic foramen.

Its main function is to prevent posterior rotation of the ilia with respect to the sacrum. Laxity of this ligament alomg with the sacrotuberous ligament allows for this posterior rotation to occur. Stresses to these ligaments occur most often when leaning forward or getting out of a chair.

Additional images

Articulations of pelvis. Anterior view.

External links

• SUNY Figs 17:02-03 - "Posterior view of the bones and ligaments of the hip joint."
• Anatomy at Dartmouth hip/hip%20ligaments/ligaments7
• Johns Hopkins

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 As such, some of the information contained herein may be outdated.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.

v • d • e Joints and ligaments of torso
Vertebral column	articulations of vertebral bodies: anterior longitudinal ligament - posterior longitudinal ligament - intervertebral disc (annulus fibrosus, nucleus pulposus) articulations of vertebral arches : ligamenta flava - supraspinous ligament (nuchal ligament) - interspinal ligament - intertransverse ligament zygapophysial joint
Costovertebral	articulation of head of rib: radiate ligament - interarticular ligament costotransverse
Sternocostal	interarticular sternocostal ligament - radiate sternocostal ligaments - costoxiphoid ligaments interchondral, costochondral
Pelvis	articulation of the vertebral column with the pelvis: iliolumbar ligament sacroiliac: anterior sacroiliac ligament - posterior sacroiliac ligament - interosseous sacroiliac ligament ligaments connecting the sacrum and ischium: sacrotuberous ligament - sacrospinous ligament sacrococcygeal symphysis: anterior sacrococcygeal ligament - posterior sacrococcygeal ligament pubic symphysis: superior pubic ligament - inferior pubic ligament

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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .