The Biomechanical Implications of Sacroiliac Joint Dysfunction

Sacroiliac Joint Dysfunction (SIJD) is a common source of chronic low back pain which may be experienced by an individual while performing leaning-forward actions (such as lifting or bending) that move the centre of gravity anterior to the acetabular axis. 

The sacroiliac joint refers to a diarthrodial synovial joint, with hyaline and fibrocartilage covering the sacral and ilial surfaces of the joint. The main function of this joint is to support the upper body and to lessen the impact of ambulation. 

As described by Cohen et al., the ligamentous structure comprising the sacroiliac joint – anterior sacroiliac, dorsal sacroiliac, sacrospinous, sacrotuberous and interosseus ligaments – prevents separation of the joint and movement of the pelvis along the various axes of the sacrum. 

The collective function of the ligaments involves maintenance of bracing during weight transference from the torso to the lower extremities. It is also worth noting that the primary function of the sacroiliac joint is supportive in nature with limited motion ................ Continue reading on mass4d.com: The Biomechanical Implications of Sacroiliac Joint Dysfunction

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