MSK LL Joints Flashcards
What type of joint is the hip joint?
A ball and socket synovial type joint.
What structures form the hip joint?
The head of the femur and the acetabulum
What is special about the two structures that form the hip joint?
They are both covered in articular cartilage, which is thicker at weight bearing places. The acetabulum is thickened b the acetabular labrum, a fibrocartilaginous collar.
What structure give stability to the movement of the hip joint?
The acetabulum is deep and encompasses nearly all of the head of the femur.
A acetabular labrum improves the stability of the joint by increasing it’s depth.
The ligaments due to their spiral orientation are tighter when the joint is extended, which adds stability to the joint and also means less energy is needed to maintain a standing position.
What structures limit movement of the hip joint?
The joint capsule and ligaments of the joint
Which muscles enable flexion of the hip joint?
Iliosoas, rectus femoris, Sartorius, Pectineus (all muscles of the anterior thigh)
Which muscles allow extension of the hip joint?
Gluteus maximus, semimembranosus, semitendinosus, biceps femoris
Which muscles allow abduction of the hip joint?
Gluteus medius, gluteus minimus and the deep gluteals minus quadratus femoris
What muscles allow adduction of the hip joint?
Adductors longus, brevis and magnus, gracilis, piriformis
Which muscles allow lateral rotation of the hip joint?
Biceps femoris, gluteus maximus and deep gluteals
Which muscles allow medial rotation of the hip joint?
Gluteus medius and mimus, semitendinosus and semimembranosus
What are the depp gluteals?
OPQ and Gemelli – Obturator internus, Piriformis, Quadratus femoris, Superior gemelli, Inferior gemelli
What are the superficial gluteals?
Gluteus maximus, gluteus medius, gluteus minimus
What are the intracupsular ligaments associated with the hip joint?
Ligament of head of femur
What are the extracapsular ligaments associated with the hip joint?
Iliofemoral, Pubofemoral, Ischiofemoral