Which structure is contacted for ALL AS listings?

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Multiple Choice

Which structure is contacted for ALL AS listings?

Explanation:
AS listings use an adjusting contact that must be a reliable, palpable point on the pelvis to guide the thrust consistently across patients. The acetabular ridge on the ilium sits at the anterior rim of the acetabulum and offers a stable, accessible contact surface in the SI/pelvic region. Because every AS adjustment relies on directing force toward that same anterior-superior area, the acetabular ridge is the structure contacted in all AS listings. The inferior or medial PSIS can be variable with body habitus and positioning, and the sacral base relates to different sacral movements, not the universal anterior-superior contact needed for every AS listing. Therefore, the acetabular ridge is the universal contact point.

AS listings use an adjusting contact that must be a reliable, palpable point on the pelvis to guide the thrust consistently across patients. The acetabular ridge on the ilium sits at the anterior rim of the acetabulum and offers a stable, accessible contact surface in the SI/pelvic region. Because every AS adjustment relies on directing force toward that same anterior-superior area, the acetabular ridge is the structure contacted in all AS listings. The inferior or medial PSIS can be variable with body habitus and positioning, and the sacral base relates to different sacral movements, not the universal anterior-superior contact needed for every AS listing. Therefore, the acetabular ridge is the universal contact point.

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