Lower Extremity - Action

Question 1

What is the action of the tensor fasciae latae?

Answer 1

Flexor, abductor and medial rotator of thigh;

Question 2

What is the action of the sartorius?

Answer 2

Flexor, abductor and lateral rotator of thigh; flexor of leg

Question 3

What is the action of the rectus femoris?

Answer 3

Extensor of leg; flexor of thigh

Question 4

What is the action of the vastus lateralis?

Answer 4

Extensor of leg

Question 5

What is the action of the vastus intermedius?

Answer 5

Extensor of leg

Question 6

What is the action of the vastus medialis?

Answer 6

Extensor of leg

Question 7

What is the action of the pectineus?

Answer 7

Adductor, flexor and medial rotator of thigh

Question 8

What is the action of the adductor longus?

Answer 8

Adductor, flexor and medial rotator of thigh

Question 9

What is the action of the adductor brevis?

Answer 9

Adductor, flexor and medial rotator of thigh

Question 10

What is the action of the obturator externus?

Answer 10

Lateral rotator of hip

Question 11

What is the action of the adductor magnus?

Answer 11

Adductor of thigh

Adductor portion: flexor and medial rotator of thigh

Hamstring portion: extensor and lateral rotator of thigh

Question 12

What is the action of the gracilis?

Answer 12

Adductor and medial rotator of thigh; flexor of leg

Question 13

What is the action of the gluteus maximus?

Answer 13

Extensor and lateral rotator of thigh

Upper fibers - abductor of thigh

Lower fibers - adductor of thigh

Question 14

What is the action of the gluteus medius?

Answer 14

Abductor and medial rotator of thigh

Question 15

What is the action of the gluteus minimus?

Answer 15

Abductor and medial rotator of thigh

Question 16

What is the action of the piriformis?

Answer 16

Abductor of flexed thigh; lateral rotator of extended thigh

Question 17

What is the action of the superior gemellus?

Answer 17

Abductor of flexed thigh; lateral rotator of extended thigh

Question 18

What is the action of the inferior gemellus?

Answer 18

Abductor of flexed thigh; lateral rotator of extended thigh

Question 19

What is the action of the obturator internus?

Answer 19

Abductor of flexed thigh; lateral rotator of extended thigh

Question 20

What is the action of the quadratus femoris?

Answer 20

Lateral rotator of thigh

Question 21

What is the action of the semitendinosus?

Answer 21

Flexor and medial rotator of leg; extensor of thigh; extensor of back

Question 22

What is the action of the semimembranosus?

Answer 22

Flexor and medial rotator of leg; extensor of thigh; extensor of back

Question 23

What is the action of the biceps femoris?

Answer 23

Flexor and lateral rotator of leg

Long head: Thigh extensor

Question 24

What is the action of the peroneus longus?

Answer 24

Evertor of foot; weak plantarflexor of foot

Question 25

What is the action of the peroneus brevis?

Answer 25

Evertor of foot; weak plantarflexor of foot

Question 26

What is the action of the tibialis anterior?

Answer 26

Invertor of foot; dorsiflexion of foot

Question 27

What is the action of the extensor hallucis longus?

Answer 27

Extensor of big toe; weak dorsiflexion of foot; weak invertor of foot

Question 28

What is the action of the extensor digitorum longus?

Answer 28

Extensor of digits; dorsiflexor of foot

Question 29

What is the action of the gastrocnemius?

Answer 29

Flexor of leg; plantarflexor of foot; raises heel

Question 30

What is the action of the soleus?

Answer 30

Plantarflexion of foot; important in posture

Question 31

What is the action of the plantaris?

Answer 31

Weak flexor of leg; weak plantarflexor of foot

Question 32

What is the action of the popliteus?

Answer 32

Flexor and medial rotator of leg; lateral unlocker of knee

Question 33

What is the action of the flexor hallucis longus?

Answer 33

Flexes big toe; plantarflexor of foot; propels foot during walking

Question 34

What is the action of the flexor digitorum longus?

Answer 34

Flexor of digits; plantarflexion of foot; invertor of foot (aid)

Question 35

What is the action of the tibialis posterior?

Answer 35

Plantarflexor of foot; invertor of foot

Question 36

What is the action of the abductor hallucis?

Answer 36

Flexor and abductor of toe

Question 37

What is the action of the flexor digitorum brevis?

Answer 37

Flexor of the four lateral toes

Question 38

What is the action of the abductor digiti minimi?

Answer 38

Abductor and flexor of little toe

Question 39

What is the action of the flexor hallucis brevis?

Answer 39

Flexes big toe

Question 40

What is the action of the quadratus plantae?

Answer 40

Flexor aid of four lateral digits

Question 41

What is the action of the flexor digiti minimi brevis?

Answer 41

Flexor of little toe

Question 42

What is the action of the lumbricals?

Answer 42

Flexor of proximal phalanx; extensor of distal phalanges

Question 43

What is the action of the adductor hallucis?

Answer 43

Adductor and flexor of the big toe

Question 44

What is the action of the dorsal interossei?

Answer 44

Flexor of proximal phalanx; extensor of distal phalanges; abductor of phalanges

Question 45

What is the action of the plantar interossei?

Answer 45

Flexor of proximal phalanx; extensor of distal phalanges; adductor of phalanges