Interosseous sacroiliac ligament
Encyclopedia
The Interosseous Sacroiliac Ligament lies deep to the posterior ligament
, and consists of a series of short, strong fibers connecting the tuberosities of the sacrum
and ilium
. The major function of the interosseous sacroiliac ligament is to keep the sacrum and ilium together and therefore prevent abduction or distraction of the sacroiliac joint. This is performed by the nearly horizontal direction of the fibers running perpendicular from the sacrum to the ilium.
Posterior ligament
The Posterior ligament can refer to:* Posterior sacroiliac ligament* Posterior ligament of the head of the fibula* Posterior ligament of the lateral malleolus* Oblique popliteal ligament* Posterior ligament of elbow...
, and consists of a series of short, strong fibers connecting the tuberosities of the sacrum
Sacrum
In vertebrate anatomy the sacrum is a large, triangular bone at the base of the spine and at the upper and back part of the pelvic cavity, where it is inserted like a wedge between the two hip bones. Its upper part connects with the last lumbar vertebra, and bottom part with the coccyx...
and ilium
Ilium (bone)
The ilium is the uppermost and largest bone of the pelvis, and appears in most vertebrates including mammals and birds, but not bony fish. All reptiles have an ilium except snakes, although some snake species have a tiny bone which is considered to be an ilium.The name comes from the Latin ,...
. The major function of the interosseous sacroiliac ligament is to keep the sacrum and ilium together and therefore prevent abduction or distraction of the sacroiliac joint. This is performed by the nearly horizontal direction of the fibers running perpendicular from the sacrum to the ilium.