Question

1. A patient presents with pain over the left (L) sacroiliac joint.

a) Define form and force closure and in relation to the pelvis and sacroiliac joints. Give 2 factors that relate to each term that assist in providing pelvic stability. (5Marks)

b) List the movement assessment of the pelvis and the hip that could be used to reproduce the patient’s pain and assist in analysing the cause of the problem.

Answer 1

The Sacroiliac Joint. ... The SIJ has a high level of stability from the self locking mechanisms of the pelvis, which comes from the anatomy andshape of the bones in the SIJ ('Form Closure) and also the muscles supporting the pelvis ('Force Closure

Factors affecting form closure altered posture and load bearing

Factors affecting force closure incresed friction due to tension of muscles and ligaments

The log roll test is the single most specific test for hip pathology. ... Forced flexion combined with internal rotation is a more sensitive maneuver which may elicit symptoms associated with even subtle hip pathology