Anterior Compartment Of Leg

Question 1

What are the muscles in the anterior compartment of leg? (4)

Answer 1

Tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius

Question 2

What are they all innervated by?

Answer 2

Deep fibular nerve

Question 3

Origin of tibialis anterior

Answer 3

Lateral surface of tibia

Question 4

Insertion of tibialis anterior

Answer 4

Medial cuneiform + base of 1st metatarsal

Question 5

Action of tibialis anterior

Answer 5

Dorsiflexion and inversion of foot

Question 6

Origin of extensor digitorum longus

Answer 6

Lateral condyle of tibia

Question 7

Insertion of extensor digitorum longus

Answer 7

Converges into a tendon, splits into 4 and inserts onto a toe

Question 8

Action of extensor digitorum longus

Answer 8

Extension of lateral 4 toes, dorsiflexion

Question 9

Origin of extensor hallucis longus

Answer 9

Medial surface of fibular shaft

Question 10

Insertion of extensor hallucis longus

Answer 10

Base of distal phalanx of great toe

Question 11

Action of extensor hallucis longus

Answer 11

Extension of great toe, dorsiflexion

Question 12

Origin of fibularis tertius

Answer 12

Medial surface of fibula

Question 13

Insertion of fibularis tertius

Answer 13

5th metatarsal

Question 14

Action of fibularis tertius

Answer 14

Eversion and dorsiflexion of foot