MSK Session 8- The Hip Joint Flashcards
What is the acetabular labrum and what does it do?
It is a fibrocartilaginous rim attached to the margin of the acetabulum.
It increases articular contact area by 10%, meaning that over 50% of the femur head sits in the acetabulum.
Why is the acetabulum weaker at the bottom?
Because it is incomplete inferiorly- acetabulum notch
What ligament strengthens the inferior portion of the acetabulum?
Transverse acetabular ligament
Why are ligaments required around the joint?
To increase stability and strengthen the joint capsule.
What does the ligament of the head of the femur do?
Provides a small arterial supply (obturator artery) to the head of the femur.
What are the 3 extra capsular ligaments?
- iliofemoral
- ischiofemoral
- pubifemoral
Which two ligaments are found anteriorly?
Iliofemoral and pubifemoral
Which ligament is found posteriorly?
Ischiofemoral
What does the iliofemoral ligament do?
Prevents hyper extension of the hip joint
What does the pubifemoral ligament do?
Prevents excessive abduction and extension
What does the ischiofemoral ligament do?
Prevents excessive extension of the femur at the hip joint.
Which muscles flex the hip? (3)
Sartorius, iliopsoas, rectus femoris
Which muscles extend the hip? (4)
Gluteus maximus, biceps femoris long head, semi membranous, semitendinous
Which muscles laterally rotate the hip? (5)
Periformis, superior and inferior gemellus, obturator internus, quads
Which muscles abduct the hip?(3)
Gluteus minimis and medius, tensor fasciae latae
