Anterior Muscles of the Leg

Question 1

Extensor Digitorum Longus

Answer 1

O: lateral condyle of tibia, proximal three-fourths of anterior surface of fibula, interosseous membrane and crural fascia

I: middle and distal phalanges of lateral four toes

A: extension of lateral four toes, dorsiflexion and eversion of foot

In: deep peroneal nerve

Question 2

Peroneus Tertius

Answer 2

O: fibula in common with lower fibers of extensor digitorum longus

I: dorsal surface of the base of the fifth metatarsal

A: dorsiflexion and eversion of foot

In: deep peroneal nerve

Question 3

Extensor Hallucis Longus

Answer 3

O: middle third of anterior surface of fibula + interosseous membrane

I: distal phalanx of the big toe

A: extension of big toe, dorsiflexion and inversion of the foot

In: deep peroneal nerve

Question 4

Tibialis Anterior

Answer 4

O: lateral condyle of tibia, proximal two-thirds of lateral surface of tibia, interosseous membrane, deep fascia of leg

I: medial cuneiform, base of first metatarsal

A: inversion and dorsiflexion of foot

In: deep peroneal nerve