msucles of the HIP Flashcards

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1
Q

what muscle can be a laterally rotators in extension or a medial rotators in flexion

A

pirifomris

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2
Q

adductors can be ___ or ___

A

flexors or extensors

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3
Q

what is the function of hip flexors

A

brings swing limbs forward during gait

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4
Q

what do hip flexors resist

A

hip extension forces

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5
Q

what are the 4 primary hip flexors

A

iliopsoas
rectus femoris
TFL
sartorius

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6
Q

what muscle does anterior pelvic tilt , lumbar extension and hip flexion in sitting

A

iliopsoas

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7
Q

what is the function of the rectus femoris

A

hip flexion and knee extension

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8
Q

the rectus femoris is the biggest contribution to hip flexion when the knee is ___

A

flexed

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9
Q

what motion does the sartorius do at the hip? knee?

A

hip: flexion , abduction and ER
knee: flexion and medial rotation

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10
Q

what is the function of the hip adductors

A

stabilizes hip in standing

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11
Q

what muscle can help hip flexion from extension

A

hip adductors

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12
Q

what muscle can extend from a flexed position

A

hip adductors

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13
Q

what are the 5 hip adductors

A

pectineus
adductor brevis
adductor longus
adductor magnus
gracilis

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14
Q

which hip adductors is a 2joint structure

A

gracilis

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15
Q

what can the gracilis help do

A

flex hip if knee is extended

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16
Q

what are the 2 main hip extensors

A

glute max
hamstrings

17
Q

what is the function og glute max for hip

A

laterla rot and extension

18
Q

what muscle has the longest MA/ peak efficiency for extension when the hip is flexed ~70

A

glute max

19
Q

what muscle is a 2 joint muscles and does knee flexion and rotation and hip extension

A

hamstrings (semitend. , semimem., biceps fem)

20
Q

for the hamstrings, if the the knee is flexed greater than 90° , what does it lose ability to do

A

extend hip

21
Q

hip extensors are assisted by what 3 muscles

A

posteior glut med
post adductor magnus
piriformis

22
Q

what are the 2 hip abductors

A

glute min and med

23
Q

what is the function of glute med

A

abduction in all hip positions

24
Q

when the hip is flexed what do all portions of the glut med do

A

IR

25
Q

anterior fibers of the glute med does what

A

flexion and IR

26
Q

posteior fibers of the glute med does what

A

ext and ER

27
Q

what is the function of the glute min

A

abduction and flexion of the hip

28
Q

what muscle plays a role in capsular tightening of the hip

A

glute min

29
Q

what are 3 mm that the hip abductors are assisted by

A

superior glute max
sartorius
TFL

30
Q

what are the 4 hip lateral rotators

A

obturator internus and externus
gemellus superior and inferior
quadratus fem
piriformis

31
Q

does the obturator internus or externus have decreased MA with hip flexion

A

OI

32
Q

what does the piriformis do when the hip is flexed > 90°

A

IR

33
Q

what are the 2 mm that assist the hip lateral rotators

A

posterior glute med
glute max

34
Q

what are the 2 muscles that are effective lateral rotators regardless of hip flexion

A

obturator externus and quadratus femoris

35
Q

what are the hip IR mm

A

no primary ones

contributors from anterior glute med , min , TFL , adductors