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Kines > Hip > Flashcards

Hip Flashcards

1
Q

Pubis makes up _____ of the acetabulum in what direction?

A

25% anterior

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2
Q

Describe the incomplete inferior rim of acetabulum

A

Acetabular notch, spanned by transverse acetabular ligament

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3
Q

Abnormally shallow acetabulum that leads to lack of fem head coverage

A

Acetabular dysplasi

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4
Q

Center edge angle for dysplasia

A

<16 degrees

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5
Q

Normal center edge angle

A

> 35 degrees

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6
Q

Implications of acetabular anteversion

A

Unstable hip

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7
Q

Implications of acetabular retroversion

A

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

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8
Q

Fibrocartilaginous ring that deepens the acetabulum

A

Labrum

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9
Q

4 roles of labrum

A
  1. Stability
  2. Increases contact area
  3. Decreases stress
  4. Allows mobility
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10
Q

Two ways to describe femoral shape

A
  1. Angle of inclination

2. Angle of torsion

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11
Q

Define angle of inclination

A

Frontal plane angle between femoral neck and shaft

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12
Q

Normal angle of inclination

A

125 degrees

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13
Q

Increase in angle of inclination

A

Coxa valga

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14
Q

Decrease in angle of inclination

A

Coxa vara

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15
Q

Define angle of torsion

A

Relative rotation between the neck and shaft in the transverse plane

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16
Q

Describe femoral anteversion and retroversion

A

Anteversion: femoral neck positioned more anteriorly relative to shaft

Retroversion: neck positioned more posteriorly relative to shaft

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17
Q

Normal femoral anteversion angle

A

15 degrees

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18
Q

How will someone with femoral anteversion compensate?

A

Pigeon toed

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19
Q

How will someone with femoral retroversion compensate?

A

Duck walk

20
Q

What kind of forces are present at femoral neck?

A

Bending

21
Q

Are greater/lesser trochs in capsule?

A

No

22
Q

Define how much mobility we have at the hip

A

Ligaments

23
Q

Function of iliofemoral lig

A

Resists hip extension, IR and ER

24
Q

Pubofemoral lig role

A

Resists extension and abduction, ER

25
Q

Ischiofemoral lig rol

A

Resists IR and extension, superior fibers resist adduction

26
Q

Close packed position of the hip

A

Full extension, slight IR and abduction

Elongates capsule

27
Q

Open packed position of the hip

A

30 degrees flexion, slight abduction and ER

28
Q

Most congruent position of hip

A

90 degrees flexion with slight abduction and ER

29
Q

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

A

Flexion

30
Q

Anterior pelvic tilt contributes to ______ of the L/S

A

Apparent extension

31
Q

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

A

Apparent abduction

32
Q

What movement of the hip is mostly spin?

A

Flexion/extension

33
Q

Direction of spin during flex/ext

A

Flexion: posterior
Extension: anterior

34
Q

LOG in double limb stance

A

Just posterior to M-L axis for flex/ext

35
Q

Reasoning behind lateral trunk lean

A

Brings LOG closer to hip joint AOR

36
Q

5 ways to tear labrum

A
  1. Trauma
  2. Instability
  3. Dysplasia
  4. FAI
  5. Degeneration
37
Q

Anterior pelvic tilt force couple

A

Iliopsoas, erector spinae

38
Q

Posterior pelvic tilt force couple

A

Abdominals, hamstrings

39
Q

Controls forward lean of body

A

Pelvic-on-femoral hip extension

40
Q

Flexed position increases extensor torque gen from

A

Glut max, adductors, hams

41
Q

Why is glut max quiet in standing?

A

The HAT weight extends the hip

42
Q

Important role of adductors

A

Stabilizing pelvis during weight shifting from one limb to the other

43
Q

When do abductors produce greatest torque?

A

Slight add or neutral position

44
Q

When do IRs create greatest torque?

A

When hip is flexed to 90 degrees

45
Q

When is external rotation most evident?

A

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

Kines (13 decks)

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