The hip is a large and very mobile joint formed by the ball (femoral head, which is the upper portion of the femur or thigh bone) and socket (acetabulum, which is a cup-shaped part of the pelvis). It connects the axial skeleton to the lower extremities designed to provide stability and weight transfer.
Being a synovial joint, the femoral head and acetabulum are lined with a durable layer of articular cartilage to help cushion the ends and allow smooth, pain-free movement. The capsule is surrounded by a thin tissue called a synovial membrane and the fluid produced by this membrane lubricates and nourishes the joint helping to eliminate friction.
On the outer surface of the acetabulum is a layer of circular cartilage called the labrum and it helps to deepen the socket therefore providing further stability of the joint. The hip is further supported by strong reinforcing ligaments and muscle groups (these are the gluteals, quadriceps, hamstrings, iliopsoas & adductor muscles).
Anatomy Hip Joint
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