Muscles of Anterior Compartment of Leg and Lateral Compartment

Question 1

Tibialis Anterior

Answer 1

O: Lateral Condyle and superior half of lateral surface of tibia and interosseous membrane
I: Medial and inferior surfaces of medial cuneiform and base of first metatarsal
N: Deep Peroneal Nerve L4 L5
A: 1. Dorsiflex ankle
2. Invert foot

Question 2

Extensor Digitorum Longus

Answer 2

O: 1. Lateral Condyle of Tibia
2. Superior 3/4 of medial surface of fibula
3. Interosseous Membrane
I: Middle and Distal Phalanges of lateral four digits
N: Deep Peroneal Nerve
A: 1. Extend lateral four digits
2. Dorsiflex ankle

Question 3

Extensor Hallucis Longus

Answer 3

O: 1. Middle part of anterior surface of fibula
2. Interosseous Membrane
I: Dorsal Aspect of base of distal phalanx of great toe
N: Deep Peroneal Nerve L5 S1
A: 1. Extend great toe
2. Dorsiflex ankle

Question 4

Peroneus Tertius

Answer 4

O: Inferior Third of anterior surface of fibula
     Interosseus membrane
I:  Dorsum of base of 5th metatarsal
N: Deep Peroneal Nerve
A: 1.  Dorsiflex ankle
    2.  Aid in eversion of foot

Question 5

Peroneus Longus

Answer 5

O: Head and Superior 2/3 of lateral surface of fibula
I: Base of 1st metatarsal and medial cuneiform
N: Superficial Peroneal Nerve L5 S1
A: 1. Evert foot
2. Weakly plantar flex ankle

Question 6

Peroneus Brevis

Answer 6

O: Inferior 2/3 of lateral surface of fibula
I: Dorsal surface of tuberosity on lateral side of base of 5th metatarsal
N: Superficial Peroneal Nerve L5 S1
A: 1. Evert foot
2. Weakly plantarflex ankle

Question 7

Extensor Digitorum Brevis

Answer 7

O: Calcanelus (floor of tarsal sinus)
Interosseus talocalcaneal ligament
Stem of inferior extensor retinaculum
I: Long extensor tendons of four medial digits (toes 2-4)
N: Deep perennial nerve
A: 1. Aids extensor digitorum longus in extending four medial toes at metatarsophalangeal and interphalangeal joints