
Define Sacroiliac Joint Dysfunction
The sacroiliac joint (SIJ) is the load-bearing, shock-absorbing union between the spine and pelvis. It is a mechanical link that connects the chain of locomotion to the rest of the body. This irregular, synovial and fibrocartilagenous joint is surrounded by a strong ligamentous-reinforced capsule and is minimally mobile, allowing only about 4 degrees of rotation and up to 1.6 mm of translation 1,2.
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