HIP JOINT
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The ball
and socket joint is formed b y the cup-shaped acetabulum of the innominate
(hip) bone and the almost spherical head of the femur.
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The
capsular ligament enclosed that head of the femur.
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The
capsular ligament encloses the head and most of the neck of the femur.
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The
cavity is deepened by the acetabular labrum, a ring of fibrocartilage attached
to the rim of the acetabulum, with stabilizes the joint without liming its
range of movement.
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The hip
joint is necessarily a sturdy and powerful joint, since it bears all body
weight when standing upright.
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It is
stabilized by its surrounding musculature, but its ligaments are also
important.
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The three
main external ligaments are also important.
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The three
main external ligaments are the iliofemoral, pubofemoral and ischiofemoral
ligaments, which are localized thickenings of the joint capsule.
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Within
the joint, the ligament of the head of the femur (ligamentum teres) attaches
the femoral head to the acetabulum.
Muscles and movements.
The lower limb can be
extended, flexed, abducted, adducted, rotated and circumducted at the hip
joint.
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