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Biomechanics > Hip BM > Flashcards

Hip BM Flashcards

1
Q

Function of the Hip

A

Weight bearing
Stability
Mobility for gait (s and l limb)
Force transmission (pelvis to femur)

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2
Q

Osteology of the acetabulum

A

Lateral
Anterior
Inferior

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3
Q

Osteology of femoral head

A

Oriented: medial, superior, anterior
2/3 of sphere
Neck
Greater trochanter

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4
Q

Normal femur angle of inclination

A

Normal = 125°

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5
Q

Coxa Vera femur angle of inclination

A

Less than 125°

Adduct hip to align

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6
Q

Coxa Valga femur angle of inclination

A

Greater than 125°

Abduct hip to align

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7
Q

Anteversion angle

A

Degree of anterior orientation of femoral head

~15° I’m adults
Greater in children

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8
Q

Increased anteversion will result in what

A

Decreased external ROM

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9
Q

Decreased anteversion will result in what

A

Decreased anteversion will result in decreased internal ROM

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10
Q

Ligament in the hip

A

Illiofemoral, pubofemoral, ischiofemoral, ligamentum teres

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11
Q

Illiofemoral restricts and tightens with what

A

Restricts extension and ant. Translation
Superior tightens with adduction
Inferior tightens with abduction

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12
Q

Pubofemoral restricts what

A

Abduction and extension

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13
Q

Ischiofemoral restricts what

A

Internal rotation and extension

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14
Q

Ligamentum teres limits what

A

IR/ER

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15
Q

Ligament function

A

Tension in all ligaments minimizes the need for muscle activity

Ambulation: prevents hyperextension

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16
Q

Arthrokinematics for femur Flex/Ext

A

Spin

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17
Q

Arthrokinematics for femur Abduction

A

Sup roll & inf glide

18
Q

Arthrokinematics for femur Adduction

A

Inferior roll & sup glide

19
Q

Arthrokinematics for femur IR

A

Ant glide & post roll

20
Q

Arthrokinematics for femur ER

A

Post roll & ant glide

21
Q

Pelvic motions: bilateral

A

Anterior/posterior tilt

ASIS moving

22
Q

Pelvic motions: unilateral

A
  • Hip hike and hip drop
  • Forward and backward rotation

*both names for the non-weight bearing side motion

23
Q

Arthrokinematics for PELVIC ant/post tilt

A

Spin

24
Q

Arthrokinematics for PELVIC hike (weight bearing side)

A

Superior roll & sup glide

25
Q

Arthrokinematics for PELVIC drop (weight bearing side)

A

Inferior roll & inferior glide

26
Q

Arthrokinematics for PELVIC forward rotation (wt bearing side)

A

Ant roll & ant glide

27
Q

Arthrokinematics for PELVIC backward rotation (wt bearing side)

A

Post roll & post glide

28
Q

Hip flexors

A

Femur flexion on pelvis

Anterior pelvic tilt

29
Q

Hip extensors

A

Glut max
Hamstrings, adductor magnus
Posterior pelvic tilt

30
Q

Hip abductors

A

…

31
Q

Hip adductors

A

Adductor magnus

32
Q

Internal rotators

A

…..

33
Q

External rotators

A

…..

34
Q

JFR during normal walking

A

2.4 x BW

35
Q

JFR during stairs

A

2.5 x BW

36
Q

JFR during running

A

5.5 x BW

37
Q

JFR during stumbling

A

8.7 x BW

38
Q

Which hand should hold the cane and why?

A

……

39
Q

Which hand should be used to carry a load and why?

A

…

40
Q

Carrying effect

A

JRF decreases with ipsilateral carrying

JRF increases with contralateral carrying

Biomechanics (5 decks)

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