Hip

Question 1

Pubis makes up _____ of the acetabulum in what direction?

Answer 1

25% anterior

Question 2

Describe the incomplete inferior rim of acetabulum

Answer 2

Acetabular notch, spanned by transverse acetabular ligament

Question 3

Abnormally shallow acetabulum that leads to lack of fem head coverage

Answer 3

Acetabular dysplasi

Question 4

Center edge angle for dysplasia

Answer 4

<16 degrees

Question 5

Normal center edge angle

Answer 5

> 35 degrees

Question 6

Implications of acetabular anteversion

Answer 6

Unstable hip

Question 7

Implications of acetabular retroversion

Answer 7

Can lead to over-coverage, impingement between acetabulum and femoral head

Question 8

Fibrocartilaginous ring that deepens the acetabulum

Answer 8

Labrum

Question 9

4 roles of labrum

Answer 9

1. Stability
2. Increases contact area
3. Decreases stress
4. Allows mobility

Question 10

Two ways to describe femoral shape

Answer 10

1. Angle of inclination

2. Angle of torsion

Question 11

Define angle of inclination

Answer 11

Frontal plane angle between femoral neck and shaft

Question 12

Normal angle of inclination

Answer 12

125 degrees

Question 13

Increase in angle of inclination

Answer 13

Coxa valga

Question 14

Decrease in angle of inclination

Answer 14

Coxa vara

Question 15

Define angle of torsion

Answer 15

Relative rotation between the neck and shaft in the transverse plane

Question 16

Describe femoral anteversion and retroversion

Answer 16

Anteversion: femoral neck positioned more anteriorly relative to shaft

Retroversion: neck positioned more posteriorly relative to shaft

Question 17

Normal femoral anteversion angle

Answer 17

15 degrees

Question 18

How will someone with femoral anteversion compensate?

Answer 18

Pigeon toed

Question 19

How will someone with femoral retroversion compensate?

Answer 19

Duck walk

Question 20

What kind of forces are present at femoral neck?

Answer 20

Bending

Question 21

Are greater/lesser trochs in capsule?

Answer 21

No

Question 22

Define how much mobility we have at the hip

Answer 22

Ligaments

Question 23

Function of iliofemoral lig

Answer 23

Resists hip extension, IR and ER

Question 24

Pubofemoral lig role

Answer 24

Resists extension and abduction, ER

Question 25

Ischiofemoral lig rol

Answer 25

Resists IR and extension, superior fibers resist adduction

Question 26

Close packed position of the hip

Answer 26

Full extension, slight IR and abduction Elongates capsule

Question 27

Open packed position of the hip

Answer 27

30 degrees flexion, slight abduction and ER

Question 28

Most congruent position of hip

Answer 28

90 degrees flexion with slight abduction and ER

Question 29

Posterior pelvic tilt can contribute to _____ of the L/S

Answer 29

Flexion

Question 30

Anterior pelvic tilt contributes to ______ of the L/S

Answer 30

Apparent extension

Question 31

Trunk side bend and frontal plane pelvic motion contributes to _____________ of hip

Answer 31

Apparent abduction

Question 32

What movement of the hip is mostly spin?

Answer 32

Flexion/extension

Question 33

Direction of spin during flex/ext

Answer 33

Flexion: posterior Extension: anterior

Question 34

LOG in double limb stance

Answer 34

Just posterior to M-L axis for flex/ext

Question 35

Reasoning behind lateral trunk lean

Answer 35

Brings LOG closer to hip joint AOR

Question 36

5 ways to tear labrum

Answer 36

1. Trauma 2. Instability 3. Dysplasia 4. FAI 5. Degeneration

Question 37

Anterior pelvic tilt force couple

Answer 37

Iliopsoas, erector spinae

Question 38

Posterior pelvic tilt force couple

Answer 38

Abdominals, hamstrings

Question 39

Controls forward lean of body

Answer 39

Pelvic-on-femoral hip extension

Question 40

Flexed position increases extensor torque gen from

Answer 40

Glut max, adductors, hams

Question 41

Why is glut max quiet in standing?

Answer 41

The HAT weight extends the hip

Question 42

Important role of adductors

Answer 42

Stabilizing pelvis during weight shifting from one limb to the other

Question 43

When do abductors produce greatest torque?

Answer 43

Slight add or neutral position

Question 44

When do IRs create greatest torque?

Answer 44

When hip is flexed to 90 degrees

Question 45

When is external rotation most evident?

Answer 45

During pelvic-on-femur rotation - planting and cutting maneuver