Interosseous sacroiliac ligament

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Interosseous sacroiliac ligament
Latinligamentum sacroiliacum interosseum
Anatomical terminology

The interosseous sacroiliac ligament, also known as the axial interosseous ligament,[1] is a ligament of the sacroiliac joint that lies deep to the posterior ligament. It connects the tuberosities of the sacrum and the ilium of the pelvis.


The interosseous sacroiliac ligament consists of a series of short, strong fibers connecting the tuberosities of the sacrum and ilium.[1] It is one of the strongest ligaments in the body.[citation needed]


The major function of the interosseous sacroiliac ligament is to keep the sacrum and ilium together.[2] This prevents abduction or distraction of the sacroiliac joint.[2] It also helps to bear the weight of the thorax, upper limbs, head, and neck. This is performed by the nearly horizontal direction of the fibers running perpendicular from the sacrum to the ilium.


Public domain This article incorporates text in the public domain from page 308 of the 20th edition of Gray's Anatomy (1918)

  1. ^ a b Bechtel, Roy (July 2001). "Physical characteristics of the axial interosseous ligament of the human sacroiliac joint". The Spine Journal. 1 (4): 255–259. doi:10.1016/s1529-9430(01)00081-x. ISSN 1529-9430. PMID 14588329.
  2. ^ a b Benzon, Honorio T. (2005-01-01), Benzon, Honorio T.; Raja, Srinivasa N.; Molloy, Robert E.; Liu, Spencer S. (eds.), "Chapter 43 - Pain Originating from the Buttock: Sacroiliac Joint Dysfunction and Piriformis Syndrome", Essentials of Pain Medicine and Regional Anesthesia (Second Edition), Philadelphia: Churchill Livingstone, pp. 356–365, doi:10.1016/b978-0-443-06651-1.50047-2, ISBN 978-0-443-06651-1, retrieved 2021-02-17

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