Actions and innervations of thigh muscles

Question 1

Semitendinosus action

Answer 1

• flex knee
• extend hip

Question 2

semimembranosus action

Answer 2

• flex knee
• extend hip

Question 3

biceps femoris action

Answer 3

• flex knee
• extend hip

Question 4

piriformis action

Answer 4

lateral rotators of hip

Question 5

tensor fasciae latae action

Answer 5

flex, abduct, medially rotate the hip

Question 6

glute medius and minimus action

Answer 6

• abduction of hip
• assist in medial and lateral rotation of hip

Question 7

glute maximus action

Answer 7

• hip extension
• hip external rotation
• secondary action: hip adduction

Question 8

gracilis action

Answer 8

• hip flexion
• hip medial rotation
• hip adduction
• knee flexion

Question 9

adductor magnus action

Answer 9

• hip adduction
• hip extension
• hip medial rotation

Question 10

adductor brevis action

Answer 10

• hip adduction
• hip flexion
• hip medial rotation

Question 11

adductor longus action

Answer 11

• hip adduction
• hip flexion
• hip medial rotation

Question 12

pectineus action

Answer 12

• hip adduction
• hip flexion
• hip medial rotation

Question 13

pectineus action

Answer 13

• hip adduction
• hip flexion
• hip medial rotation

Question 14

sartorius action

Answer 14

• hip flexion
• hip abduction
• hip lateral rotation
• knee flexion

Question 15

vastus intermedius action

Answer 15

extends knee

Question 16

vastus medialis action

Answer 16

extends knee

Question 17

vastus lateralis action

Answer 17

extends knee

Question 18

rectus femoris

Answer 18

• extends knee
• flexes hip

Question 19

rectus femoris innervation

Answer 19

femoral

Question 20

vastus lateralis innervation

Answer 20

femoral

Question 21

vastus medialis innervation

Answer 21

femoral

Question 22

vastus intermedius innervation

Answer 22

femoral

Question 23

sartorius innervation

Answer 23

femoral

Question 24

pectineus innervation

Answer 24

femoral

Question 25

adductor longus innervation

Answer 25

obturator

Question 26

adductor brevis innervation

Answer 26

obturator

Question 27

gracilis innervation

Answer 27

obturator

Question 28

adductor magnus innervation

Answer 28

- obturator - tibial portion of sciatic nerve

Question 29

gluteus maximus innervation

Answer 29

inferior gluteal

Question 30

glute medius and minimus innervation

Answer 30

superior gluteal

Question 31

TFL innervation

Answer 31

superior gluteal

Question 32

piriformis innervation

Answer 32

nerve to piriformis

Question 33

biceps femoris innervation

Answer 33

sciatic

Question 34

semimembranosus innervation

Answer 34

sciatic

Question 35

semitendinosus innervation

Answer 35

sciatic