Anterior Shank Muscles

Question 1

Tibialis Anterior

Answer 1

O: Upper Lateral Tibia, Interosseous Membrane

I: Junction of the 1st Ray

A: Dorsiflexion and Inversion

N: Deep Peroneal
(L4 - 5)

Question 2

Extensor Hallucis Longus

Answer 2

O: Anterior Fibula, Interosseous Membrane

I: Base of distal phalanx of hallux

A: Dorsiflexion, Inversion, Extends Big Toe

N: Deep Peroneal
(L4 - 5)

Question 3

Extensor Digitorum Longus

Answer 3

O: Lateral Tibial Condyle, Upper ¾ of Anterior Fibula, Interosseous Membrane

I: Toes 2-5
(one central and two lateral slips)

A: Dorsiflexion, Eversion, Extends Toes 2-5

N: Deep Peroneal
(L4 - 5)

Question 4

Peroneus Tertius

*NOT FOUND IN EVERYONE

Answer 4

O: Anterior Lateral Fibula

I: Dorsal Base of 5th Metatarsal

A: Dorsiflexion and Eversion

N: Deep Peroneal (L4 - 5)

Question 5

Peroneus Longus

Answer 5

O: Head and Upper Fibula

I: Plantar Junction of the 1st Ray

A: Plantar Flexion and
Eversion

N: Superficial Peroneal Nerve (L5 - S2)

Question 6

Peroneus Brevis

Answer 6

O: Lower 2/3 of Fibula

I: Tuberosity at the Base of the 5th Metatarsal

A: Plantar Flexion and Eversion

N: Superficial Peroneal Nerve (L5 - S2)