Hip

Question 0

Classification of acetabular femoral joint.

Answer 0

Structure: synovial
Subtype: ball and socket
Function: diarthrotic
Axis: multiaxial

Question 1

Why is the hip more stable than the GH joint?

Answer 1

1. Negative intracapsular pressure
2. Stronger joint capsule
3. A more spherical head in a deeper socket.

Question 2

Acetabular-femoral joint: ROM

Answer 2

Flexion: 120°
Extension: 30°
Abduction: 45°
Adduction: 30°
Medial rotation: 35°
Lateral rotation: 45°

Question 3

In the hip, what limits medial rotation?

Answer 3

Ischiofemoral ligament

Question 4

In the hip, what limits lateral rotation?

Answer 4

Pubofemoral and iliofemoral ligaments.

Question 5

Acetabular-femoral joint: resting position

Answer 5

30° flexion
30° abduction
Slight lateral rotation

Question 6

Acetabular-femoral joint: closed pack position

Answer 6

Full extension, abduction and medial rotation

Question 7

Acetabular-femoral joint: capsular pattern

Answer 7

IR and abduction
(more than)
Flexion and extension
(more than)
ER

Question 8

Acetabular-femoral joint: articular surfaces

Answer 8

Femoral head (convex)
Acetabulum (concave)

=> CONVEX ON CONCAVE

Question 9

Acetabular-femoral joint: ligaments

Answer 9

1. Ligamentum capitis femoris (ligamentum teres)
2. Iliofemoral
3. Pubofemoral
4. Ischiofemoral
5. Transverse acetabular
6. Zona orbicaris

Question 10

Acetabular-femoral joint: Joint Mobs

Answer 10

Distraction
Long axis traction/inferior glide (abduction)
Posterior glide (flexion/medial rotation)
Anterior glide (extension/lateral rotation)
Postero-lateral glide (medial rotation)
Lateral glide (adduction, medial rotation)