Medically Micobiology

Question 1

List three gross anatomical features/structures that prevent hip dislocation (promote
stability of the hip joint) in a normal adult hip, and briefly explain the role of each
feature/structure. (3 x 2 marks = 6 marks)

Answer 1

Shape of bones – ball (head of femur) and shallow socket (acetabular cavity). Acetabular
labrum (a rim of fibrocartilage attached to the margins of the acetabulum) helps to deepen the
joint cavity (2)
Fibrous capsule that surrounds the joint - attaching proximally to the acetabulum and distally
to the intertrochanteric line and to the neck of the femur – encloses the joint cavity. (2).
Ligaments – iliofemoral, ischiofemoral and pubofemoral ligaments, which are also
thickenings of the joint capsule; transverse ligament of the acetabulum bridges the acetabular
notch (2)
Muscles/ tendons