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Laboratory 17. Major Joints of the Lower Extremity
Step 1. Hip Joint

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To study the cavity of the hip joint (Figure 17.3 and Figure 17.4), the articular capsule was cut circumferentially, and the femur was externally (or laterally) rotated. The ligament of the head of the femur spans between the femur and the acetabular fossa. To fully expose the joint cavity, the (round) ligament of the head of the femur [another specimen] was cut. This ligament conveys the foveolar artery that supplies blood to the head of the femur. Fractures which compromise this blood supply may lead to necrosis of the femoral head.

Links and References:
Grant's: 5.42, 5.43, and 5.49
Netter (1ed.): 474 (2ed.): 470
Rohen/Yokochi: 418 and 419