hip musculature

Question 1

anterior muscles

Answer 1

iliopsoas

rectus femoris

sartorius

Question 2

iliopsoas

Answer 2

most important primary hip flexor

postural muscle

Question 3

when is ilopsoas active

Answer 3

supine to sit

legs are fixed

sit-up

Question 4

rectus femoris

Answer 4

2 joint muscle

will flex the hip and extend the knee

Question 5

is the rectius femoris more efficient at the knee or hip

Answer 5

as a knee extensor

Question 6

most efficient position at hip (RF)

Answer 6

when knee is flexed

Question 7

rectus femoris –> hip is free to move and knee is stable

Answer 7

hip flexion will occur

Question 8

rectus femoris –> hip and knee are both free to move

Answer 8

hip flexion and knee extension

Question 9

rectus femoris –> knee is free to move but hip is stable

Answer 9

knee extension

Question 10

rectus femoris –> both are stable

Answer 10

anterior pelvic tilt

Question 11

rectus femoris –> active insufficiency

Answer 11

too short –> hip flexion and knee extension

too long –> hip extension and knee flexion

Question 12

rectus femoris –> passive insuff

Answer 12

hip extension and knee flexion

Question 13

sartorius

Answer 13

2 joint muscle

will flex the hip and knee

ER and ABD the hip

IR the tibia

Question 14

where is the sartorius strongest

Answer 14

at the hip

Question 15

posterior muscles

Answer 15

glute max

hamstrings

piriformis

quadratus femoris

obturator internus

obturator externus

superior and inferior gemillus

Question 16

glute max

Answer 16

one joint muscle

primary hip extensor

will ER the hip

Question 17

when does the glute max work

Answer 17

when resistance is greater than the weight of the limb

Question 18

the more the hip is flexed

Answer 18

less the glute max is used

Question 19

closed kinetic chain –> glute max

Answer 19

ER will result in contralateral trunk rotation

Question 20

hamstrings

Answer 20

2 joint muscle

extend the hip and flex the knee

Question 21

where are the hamstrings stronger

Answer 21

the hip

Question 22

lateral hammys

Answer 22

biceps femoris

extends and ER the hip

flexes and ER the tib

Question 23

medial hammys

Answer 23

semimembranosis and semitendinosis

extend and IR the hip

flex and IR the tib

Question 24

hamstrings are the

Answer 24

PRIMARY HIP EXTENSORS

Question 25

hamstring greatest moment arm

Answer 25

hip flexed at approx 35 degrees

Question 26

when are the hammys active

Answer 26

all movements that require hip extension

Question 27

hammys --> both knee and hip are free to move

Answer 27

hip ext knee flexion

Question 28

hammys --> both hip and knee are stable

Answer 28

posterior pelvic tilt

Question 29

hammys --> hip is stable and knee is free

Answer 29

knee flexion

Question 30

hammys --> hip is free and knee is stable

Answer 30

hip extension

Question 31

hammys --> active insuff

Answer 31

too short --> hip extension and knee flexion too long --> hip flexion and knee extension

Question 32

hammys -->passive insuff

Answer 32

hip flexion and knee extension

Question 33

piriformis

Answer 33

one joint muscle action is dependent on hip position

Question 34

piriformis --> hip in ext and up to 90 degrees of flexion

Answer 34

ER hip

Question 35

piriformis --> over 90 degrees of flexion

Answer 35

IR hip

Question 36

what can the piriformis assist with

Answer 36

hip ABD

Question 37

where does the sciatic never enter

Answer 37

enters gluteal region just inferior to the piriformis muscle

Question 38

quadratus femoris

Answer 38

hip ER

Question 39

obturator internus

Answer 39

hip extended --> ER hip flexed 30 or more --> IR assist with hip ABD stabilize the hip

Question 40

obturator externus

Answer 40

hip ER assist with hip ABD stabilize the hip

Question 41

superior and inferior gemillus

Answer 41

hip ER assist with hip ABD stabilize the hip

Question 42

medial muscles

Answer 42

primary function is hip ADD adductor longus adductor magnus adductor brevis gracilis

Question 43

work horse of the adductors

Answer 43

adductor longus IR the hip too flexor --> hip flexed up to 70 extensor --> hip flexed over 70

Question 44

when is adductor magnus active

Answer 44

when resistance is added to ADD will also IR the hip flexor --> hip is extended or flexed to 50 extensor --> hip flexed over 50

Question 45

lateral muscles

Answer 45

glute med glute min TFL

Question 46

glute med

Answer 46

largest of the lateral hip muscles anterior, posterior and middle fibers can work independently all fibers active for ABD

Question 47

glute med --> anterior fibers

Answer 47

flexion and IR

Question 48

glute med --> posterior fibers

Answer 48

hip ext and ER

Question 49

what does the glute med do during single leg stance

Answer 49

maintain a level pelvis