Sacroiliac
Sacroiliac
Sacroiliac (pronunciation: /ˌsakroʊɪˈliːæk/) refers to the joint in the bony pelvis between the sacrum and the ilium of the pelvis, which are joined by strong ligaments. The term is derived from the Latin words "sacrum" meaning sacred bone, and "ilium" meaning flank or hip.
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. 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 (tailbone).
The ilium is the uppermost and largest part of the hip bone, and appears in most vertebrates including mammals and birds, but not bony fish. The joint between the sacrum and the ilium is called the sacroiliac joint.
Function
The primary functions of the sacroiliac joint are to absorb shock from the body's movements, and to provide stability for the body. It is supported by a system of ligaments, which help to maintain the stability of the pelvis.
Related Terms
- Sacroiliitis: Inflammation of the sacroiliac joint.
- Sacroiliac Joint Dysfunction: Abnormal movement of the sacroiliac joints, which can cause pain and discomfort.
- Ankylosing Spondylitis: A type of arthritis that affects the spine, often involving the sacroiliac joints.
See Also
External links
- Medical encyclopedia article on Sacroiliac
- Wikipedia's article - Sacroiliac
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