Hip Muscles

Question 1

Iliopsoas Action

Answer 1

Powerful hip flexor

weak adductor and ER

Question 2

Glut Max Action

Answer 2

Largest and most important hip extensor

Important ER

Question 3

Glut Med Action

Answer 3

Stabilizer in one leg stance
Decelerator of hip adduction
Ant fibers = flex, abduct, IR
Post fibers = ext, ER

Question 4

Glut Min Action

Answer 4

Major IR

Also helps to abduct thigh

Question 5

Piriformis Action

Answer 5

ER of the hip when less than 60 degrees hip flexion

At 90 degrees hip flexion is an IR and abductor

Question 6

Rectus Femoris Action

Answer 6

Flexion at the hip and extension at the knee

Functions most as a hip flexor when the knee is flexed

Question 7

Obturator Internus Action

Answer 7

ER of hip and IR of ilium

Is an abductor of hip at 90 deg hip flexion

Question 8

Obturator Externus Action

Answer 8

Adductor and ER of hip

Question 9

Gemelli Action

Answer 9

Minor ER of the hip

Question 10

Quadratus Femoris Action

Answer 10

ER of the hip

Question 11

Pectineus Action

Answer 11

Adductor, flexor, and IR of the hip

Question 12

TFL Action

Answer 12

Flexes, abducts, and ER hip

Question 13

Sartorius Action

Answer 13

Flexion, abduction, ER of the hip

Some degree of knee flexion

Question 14

Biceps Femoris Action

Answer 14

(long head)

Extends at the hip and flexes the knee and ER the tibia

Question 15

Semimembranosus and Semitendinosus Action

Answer 15

Extend the hip
Flex the knee
Weakly adduct the hip
Assist with IR of the thigh and leg

Question 16

Adductor Magnus Action

Answer 16

Most powerful adductor

Active to a certain degree in all hip motions except for abduction

Question 17

Adductor Longus Action

Answer 17

Assists with ER in extension and IR in other positions

Question 18

Gracilis Action

Answer 18

Adduct and flex the thigh

Flex and IR the leg

Question 19

Hip Flexors

Answer 19

1. Iliopsoas
2. Sartorius
3. TFL
4. Rectus Femoris
5. Pectineus
6. Adductor Longus

Question 20

Hip Extensors

Answer 20

1. Glut max
2. Semitend
3. Semimem
4. Biceps femoris
5. Adductor magnus post head

Question 21

Hip Abductors

Answer 21

Glut med
Glut min
TFL

Question 22

Hip Adductors

Answer 22

Adductor magnus
Adductor longus
Adductor brevis
Gracilis
Pectineus

Question 23

Hip ER

Answer 23

Glut max
Gemilli sup and inf
Obturator int
Quad femoris
Piriformis with less than 60 degrees hip flexion