What is Sacroiliac Joint Dysfunction (SIJD)?
The Sacroiliac Joint (SIJ) is kind of L shaped front to back. The surface of one side of the joint (ilial) has a little bulge. The surface of the other side (sacral) has an indentation. This keeps the joint centered. The joint goes out when you are leaning forward to do something and you fail to support the front of your pelvis with you abdominal muscles. The front of the pelvis rocks down (rotating anteriorly or forward) on the front part of the SIJ (the S1 segment) and the back part of the pelvis rotates up and out on the back of the sacrum at the S3 segment. Because the S1 and S3 segments angle in different directions, and the most pressure is at S3, the pelvis slips up and out there and goes a little out of joint (subluxates). This rotation causes the ilial bulge to rise up out of the sacral indentation and flares (spreads) the pelvis. This may tear the joint capsule, tear the long posterior sacroiliac ligament, loosens the iliolumbar ligaments and destabilizes the disks. When the
