Muscles of the Leg

Question 1

What are the compartment of the leg, and how many muscles are in each?

Answer 1

Anterior (4)
Lateral (2)
Posterior (3) Superficial
Posterior (4) Deep

Question 2

What are the origins of tibialis anterior?

Answer 2

Tibia and interosseous membrane.

Question 3

What are the insertions of tibialis anterior?

Answer 3

Medial cuneiform and base of metatarsal 1.

Question 4

What are the actions of tibialis anterior?

Answer 4

Dorsiflexion of the foot at the ankle joint; inversion of foot.

Question 5

What innervates tibialis anterior?

Answer 5

Deep fibular nerve.

Question 6

What are the origins of extensor digitorum longus?

Answer 6

Fibula and lateral tibial condyle.

Question 7

What is the insertion of extensor digitorum longus?

Answer 7

Via dorsal digital expansions into digits 2-5.

Question 8

What are the actions of extensor digitorum longus?

Answer 8

Extension of lateral digits 2-5 and dorsiflexion of foot.

Question 9

What innervates extensor digitorum longus?

Answer 9

Deep fibular nerve.

Question 10

What are the origins of extensor hallucis longus?

Answer 10

Fibula and interosseous membrane.

Question 11

What is the insertion of extensor hallucis longus?

Answer 11

Distal phalanx of great toe.

Question 12

What are the actions of extensor hallucis longus?

Answer 12

Extension of great toe and dorsiflexion of foot.

Question 13

What innervates extensor hallucis longus?

Answer 13

Deep fibular nerve.

Question 14

What is the origin of fibularis tertius?

Answer 14

Distal part of fibula.

Question 15

What is the insertion of fibularis tertius?

Answer 15

Base of metatarsal 5.

Question 16

What are the actions of fibularis tertius?

Answer 16

Dorsiflexion and eversion of foot.

Question 17

What innervates fibularis tertius?

Answer 17

Deep fibular nerve.

Question 18

What is the origin of fibularis longus?

Answer 18

Upper surface of fibula.

Question 19

What is the insertion of fibularis longus?

Answer 19

Medial cuneiform and base of metatarsal 1.

Question 20

What are the actions of fibularis longus?

Answer 20

Eversion and plantarflexion of foot.

Question 21

What innervates fibularis longus?

Answer 21

Superficial fibular nerve.

Question 22

What is the origin of fibularis brevis?

Answer 22

Lower surface of fibula.

Question 23

What is the insertion of fibularis brevis?

Answer 23

Base of metatarsal 5.

Question 24

What are the actions of fibularis brevis?

Answer 24

Eversion and plantarflexion of foot.

Question 25

What innervates fibularis brevis?

Answer 25

Superficial fibular nerve.

Question 26

What innervates flexor hallucis longus?

Answer 26

Tibial nerve.

Question 27

What is the origin of flexor digitorum longus?

Answer 27

Tibia.

Question 28

What is the insertion of flexor digitorum longus?

Answer 28

Distal phalanges 2-5.

Question 29

What are the actions of flexor digitorum longus.

Answer 29

Flexes digits 2-5.

Question 30

What innervates flexor digitorum longus?

Answer 30

Tibial nerve.

Question 31

What are the origins of tibialis posterior?

Answer 31

Interosseous membrane, tibia, and fibula.

Question 32

What are the insertions of tibialis posterior?

Answer 32

Navicular, all cuneiform bones, and metatarsal 2-4.

Question 33

What are the actions of tibialis posterior?

Answer 33

Inversion and plantarflexion of the foot.

Question 34

What innervates tibialis posterior?

Answer 34

Tibial nerve.