Anterior Compartment of Leg

Question 1

What is the origin of tibialis anterior?

Answer 1

Lateral condyle of tibia. Lateral shaft of tibia and interosseous membrane.

Question 2

What is the origin of extensor digitorum longus?

Answer 2

Lateral condyle of tibia. Anterior shaft of tibia and interosseous membrane.

Question 3

What is the origin of extensor hallucis longus?

Answer 3

Anterior shaft of fibula and interosseous membrane.

Question 4

What is the origin of fibularis tertius?

Answer 4

Distal medial surface of fibula.

Question 5

What is the insertion of tibialis anterior?

Answer 5

Medial cuneiform and base of first metatarsal

Question 6

What is the insertion of extensor digitorum longus?

Answer 6

Middle and distal phalanges of lateral four toes.

Question 7

What is the insertion of extensor hallucis longus?

Answer 7

Distal phalanx of great toe.

Question 8

What is the insertion of fibularis tertius?

Answer 8

Base of fifth metatarsal

Question 9

What is the common innervation of the anterior compartment of the leg?

Answer 9

Deep Fibular Nerve.

Question 10

What is the nerve root for tibialis anterior?

Answer 10

(L4, L5) Mainly L4

Question 11

What is the nerve root for both extensors and fibularis tertius?

Answer 11

L5 S1

Question 12

What is the common action of all 4 anterior muscles?

Answer 12

Dorsiflexion of the foot

Question 13

What is the action of tibialis anterior?

Answer 13

Inversion of foot

Question 14

What is the action of extensor digitorum longus?

Answer 14

Extension of lateral four toes

Question 15

What is the action of extensor hallucis longus?

Answer 15

Extension of the great toe

Question 16

What is the action of fibularis tertius?

Answer 16

Eversion of foot