Compartments The leg is divided into four osseofascial compartments by interosseous membrane of the leg transverse intermuscular septum anterior intermuscular (crural) septum Compartment Contents Anterior compartment muscular tibialis anterior extensor hallucis longus extensor digitorum longus peroneus tertius neurovascular deep peroneal nerve anterior tibial vessels Lateral compartment muscular peroneus longus peroneus brevis neurovascular superficial peroneal nerve Superficial posterior compartment muscular gastrocnemius plantaris soleus neurovascular sural nerve Deep posterior compartment muscular tibialis posterior flexor hallucis longus flexor digitorum longus popliteus neurovascular tibial nerve posterior tibial vessels