Anterior Compartment of Leg

Muscles

The anterior compartment contains muscles that are basically extensors of the ankle and toes. They include:
  • tibialis anterior
  • extensor digitorum longus
  • extensor hallucis longus

Nerves

The nerve of the anterior compartment of the leg is the deep peroneal nerve. This nerve terminates between the big toe and second toe and can be tested at this point.

Arteries

The artery of the anterior compartment of the leg is the anterior tibial artery which is a branch of the popliteal artery. Its terminal branch, the dorsalis pedis, can be palpated on the dorsum of the foot between the 1st and 2nd metatarsal bones.

Table of Muscles

Muscle Origin Insertion Action Nerve
Supply
tibialis anterior shaft of tibia and interosseous membrane medial cuneiform and base of first metatarsal extends the foot at ankle;
inverts foot at subtalar and transverse tarsal joints
helps to maintain the medial longitudinal arch of foot
deep peroneal nerve
extensor digitorum longus shaft of fibula and interosseous membrane extensor expansion of lateral four toes extends toes; dorsiflexes (extends) foot deep peroneal nerve
peroneus tertius shaft of fibula and interosseous membrane base of fifth metatarsal dorsiflexes (extends) foot; everts foot at subtalar and transverse tarsal joints deep peroneal nerve
extensor hallucis longus shaft of fibula and interosseous membrane base of distal phalanx of big toe extends big toe; dorsiflexes foot; inverts foot at subtalar and transverse tarsal joints deep peroneal nerve
extensor diditorum brevis calcaneus long extensor tendons to 2nd, 3rd, and 4th toes extends big toe deep peroneal nerve
extensor hallucis brevis calcaneus proximal phalanx of big tow extends big toe deep peroneal nerve

Cross Section Through the Leg

This is a section through the left leg. You are looking up into the leg so medial will be to your left.


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Lower Limb Bones |  Anterior Thigh |  Medial Thigh |  Gluteal Region |  Posterior Thigh |  Anterior Leg and Dorsal Foot |  Lateral Leg |  Posterior Leg |  Sole of the Foot |  Ankle |  Joints of the Lower Limb |  Summary of Items in the Lower Limb | Radiographs of the Lower Limb |  Table of Muscles | 



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