Hip Joint Stability – Open Packed & Close Packed

Hip Joint Stability – Open Packed & Close Packed

Closed-packed position

It is the position of a joint in which fibrous capsule and ligaments are taut and articular surfaces are fully congruent, i.e. have a maximum area of contact with each other. This is the most stable position of joint and therefore dislocations are rare in this position.

“Importance Of Hip Joint Stability For Movement”

Loose-packed position

It is the position of a joint in which articular surfaces are not congruent. The capsule and ligaments are lax. This is an unstable position of the joint; therefore, dislocations commonly occur in this position.

Hip Joint Stability Open Packed and Close Packed Position

“Risk Factors For Poor Hip Joint Stability”

Question 2. Enumerate the intra-articular structures found within the synovial joint.
Answer.

• Cartilaginous structures:
  • Articular discs of temporomandibular and sternoclavicular joints
  • Articular menisci (semilunar cartilages) of the knee joint
  • Labrum: Glenoid labrum of the shoulder joint and the acetabular labrum of the hip joint

Open Packed and Close Packed Positions of Hip Joint

“Early Signs Of Problems With Hip Joint Stability”

• Ligament-traversing joint: They bind articular surfaces, for example, ligamentum teres of the hip joint and cruciate ligaments of the knee joint
• Tendons traversing the joint cavity: These arise inside the capsule of the joint and transverse the joint cavity, for example, tendon of the long head of the biceps traversing the cavity of shoulder joint and the tendon of the popliteus traversing the cavity of the knee joint