Hip Joint

Question 1

What is the capsular pattern of restriction of the hip joint?

Answer 1

Flexion > IR > Abduction

Question 2

What type of joint is the hip joint?

Answer 2

simple, unmodified ovoid joint

- ball and socket joint with 3 degrees of freedom

Question 3

Describe the articulating surfaces of the hip joint

Answer 3

The femoral head articulates with the acetabulum which is lined by a fibrocartilaginous ring to help promote movement.

Based on concave-convex rule the acetabulum is a convex surface, the head of the femur is a concave surface.

Question 4

Describe the arthrokinematic movements at the hip joint in the saggital plane

Answer 4

Flexion and Extension involve a pure spin of the head of the femur (convex surface) in the acetabulum (concave surface)

Question 5

Describe the arthrokinematic movements at the hip joint in the frontal plane

Answer 5

Based on concave-convex rule the acetabulum is a concave surface, the head of the femur is a convex surface. Two hip movements occur in the frontal plane.

Abduction, which involves a superior roll of the head of the femur and an inferior glide along the surface of the acetabulum.

Adduction, which involves an inferior roll of the head of the femur and a superior glide along the surface of the acetabulum.

Question 6

Describe the arthrokinematic movements at the hip joint in the transverse plane

Answer 6

Based on concave-convex rule the acetabulum is a concave surface, the head of the femur is a convex surface. Two hip movements occur in the transverse plane.

Hip external rotation involves a lateral roll of the head of the femur and an anterior glide in the acetabulum.

Hip internal rotation involves a medial roll of the head of the femur and a posterior glide in the acetabulum.

Question 7

what is the biggest difference between the hip vs shoulder joint?

Answer 7

The hip contains a deeper socket and cannot move independently compared to the shoulder girdle.

Question 8

what is the average femoral neck angle in the frontal plane?

A) 120 degrees
B) 125 degrees
C) 135 degrees
D) 110 degrees

Answer 8

125 degrees, 120 in elderly

Question 9

what is the average femoral neck angle in the transverse plane?

a) 5-10 degrees
b) 10-15 degrees
c) 20 degrees
d) 25 degrees

Answer 9

10-15 degrees between the axis of the femoral neck and transverse axis of the femoral condyle

Question 10

What is the functional difference between femoral anteversion vs retroversion?

Answer 10

Anteversion (females more common)

• Increased IR, decreased ER
• pigeon/inward toes
• increase pronation and lumbar lordosis
• higher risk for dislocation

Retroversion
- Increased ER, decreased IR
- more likely to supinate foot, with toe-out positioning
-

Question 11

Where can hip pain be referred?

Answer 11

• the lumbar spine, Sacroilliac joint, pelvic, internal organs, knee joint

Question 12

what are the total hip replacemtn precaution 6-8 weeks post-op?

Answer 12

• No hip adduction past midline
• no hip flexion past 90 degrees
• don’t cross legs

Question 13

what are the total hip replacement precaution 6-8 weeks post-op?

Answer 13

• No hip adduction
• ## no hip flexion past 90 degrees

Question 14

What are the special tests for the hip and their objective?

Answer 14

• Trendelenburg test for glute medius weakness
• Faber’s test for asymmetry between limbs
• modified Thomas test for iliopsoas or hip flexor contracture
• Ober’s test for ITB tightness
• Craig’s test for anteversion or retroversion