Muscles of Anterior Fascial Compartment of Leg

The tibialis anterior muscle originates on the lateral surface of the tibia and interosseous membrane, inserts on the medial cuneiform and base of the first metatarsal, and is innervated by the deep fibular nerve (L4, 5).

The extensor digitorum longus muscle originates on the anterior surface of the fibula, inserts on the lateral four toes, and is innervated by the deep fibular nerve (L5; S1).

The extensor hallucis longus muscle originates on the anterior surface of the fibula, inserts on the base of the distal phalanx of the big toe, and is innervated by the deep fibular nerve (L5; S1).

The fibularis tertius muscle originates on the anterior surface of the fibula, inserts on the base of the fifth metatarsal, and is innervated by the deep fibular nerve (L5; S1).

Inversion of the foot is a movement that turns the sole of the foot medially.

Eversion of the foot is a movement that turns the sole of the foot laterally.

Extension (dorsiflexion) of the foot is the upward movement of the foot at the ankle joint.

The anterior tibial artery runs deep beneath the muscles of the anterior compartment of the leg, accompanied by the deep fibular nerve.

The anterior tibial artery becomes the dorsalis pedis artery after passing the level of the malleoli.

The deep fibular nerve is responsible for innervating the muscles of the anterior compartment of the leg, including the tibialis anterior, extensor digitorum longus, extensor hallucis longus, and fibularis tertius.