Unilateral and Bilateral Anterior-Posterior Movements of the Innominate

Both the unilateral and bilateral anterior-posterior (AP) of the innominate promotes posterior rotation of the innominate on the sacrum. Although both techniques should be examined, determination of which technique to use is based on the most complete reproduction of symptoms.

Figure 12.11 Unilateral AP of the ASIS


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Step One: The patient assumes a prone position. Resting symptoms are assessed.

Step Two: For a unilateral AP, the clinician applies a light posterior pressure at the ASIS to promote posterior rotation of the innominate. The AP should be applied just to the first report of pain. (For a bilateral AP, the same process occurs with the contact points of both ASIS.)

Step Three: The clinician then applies the force beyond the first point of pain and reassesses the patient's concordant sign.

Step Four: The clinician then applies 5-30 seconds of repeated end range oscillations to determine the behavior of the concordant pain. Because the SIJ is a strong and irregular jOint, a significant load may be required to produce symptoms.90 A positive sign that would implicate this method as a treatment is reduction of pain with continuous oscillations.

Step Rve: If a unilateral AP is performed, the clinician can repeat on the opposite side.

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  • Category: Musculoskeletal system