muscle action

Question 1

biceps femoris

Answer 1

flexes leg at knee

laterally rotates knee when flexed

Question 2

semitendinosus

Answer 2

flexes leg at knee

medially rotates knee when knee is fixed

Question 3

semimembranosus

Answer 3

flexes leg at knee

medially rotates knee when knee is fixed

Question 4

rectus femoris

Answer 4

extends leg at knee

Question 5

vastus lateralis

Answer 5

extends leg at knee

Question 6

vastus medialis

Answer 6

extends leg at knee

Question 7

vastus intermedius

Answer 7

extends leg at knee

Question 8

sartorius

Answer 8

flexes leg at knee

Question 9

gracilis

Answer 9

flexes leg at knee

medially rotates when knee is flexed

Question 10

adductor magnus

Answer 10

• oblique head-adducts and flexes thigh at hip

- vertical head-extends thigh at hip

Question 11

adductor longus

Answer 11

adducts and flexes thigh at hip

Question 12

adductor brevis

Answer 12

adducts and flexes thigh at hip

Question 13

gluteus medius

Answer 13

abducts thigh at hip

Question 14

gluteus maximus

Answer 14

extends, laterally rotates thigh at hip

helps abduct thigh

Question 15

iliopsoas

Answer 15

flex trunk on thigh
flex thigh
lateral flexion of vertebral column

Question 16

tensor fasciae

Answer 16

flexes, abducts and medially rotates thigh

Question 17

gastrocnemius

Answer 17

plantar flexes foot

Question 18

soleus

Answer 18

plantar flexes foot

Question 19

tibialis anterior

Answer 19

dorsiflexes foot at ankle