Ligaments of the hip

1. What is the purpose of the acetabular labrum?
2. What is the iliofemoral ligament?
3. What ligament checks medial rotation? Abduction?
4. What is the first ROM to be limited in OA?

Answers:
1. Deepens acetabulum and holds femoral head in place.
2. The iliofemoral ligament (Y-ligament of Bigelow) is the strongest ligament in the body, going from the AIIS to the intertrochanteric line.
3. The ischiofemoral ligament checks medial rotation. The pubofemoral ligament checks abduction.
4. Internal rotation.