Sacroiliac Joint Dysfunction Essay

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Sacroiliac joint dysfunction is found in 15 to 30% individuals with low back pain.1 Sacroiliac joint dysfunction can be a result of acute trauma, heavy lifting, prolonged bending, torsional strain, fall on to the buttocks and motor vehicle accidents. Chronic and repetitive shear or torsional forces associated with sports like golf, bowling, skating may also result in sacroiliac joint dysfunction. Prolonged sitting or lying on the affected side, more weight bearing on the affected side during walking or standing, forward bending with knees extended may also predispose a person to sacroiliac joint dysfunction.3 Mechanism of dysfunction: Dysfunction occurs mostly when a person lifts something in a forward flexed position or stands in lordotic posture. Due to this, line of gravity shifts anterior to the acetabulum which creates rotational force in extension around …show more content…

In healthy individuals, anterior rotation of the innominate occurs during extension of the freely swinging leg. When the innominate anteriorly rotates, it glides inferiorly down the short arm and posteriorly along the long arm of the SIJ. In non-weights bearing an arthrokinematic glide between the innominate and the sacrum occurs during posterior rotation of the innominate and is physiological (i.e., follows the articular surfaces). In weight bearing, the close-packing of the SIJ precludes this physiological glide. Sacral nutation produces the same relative arthrokinematic glide as posterior rotation of the innominate (inferoposterior motion of the sacrum is the same as anterosuperior motion of the innominate); sacral counternutation produces the same arthrokinematic glide as anterior rotation of the innominate (anterosuperior motion of the sacrum is the same as inferoposterior motion of the

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