The nerve contains axons from the L4, L5, and S1 spinal nerves.īlood for the compartment is supplied by the anterior tibial artery, which runs between the tibialis anterior and extensor digitorum longus muscles. The lower leg has four muscle compartments: the anterior, lateral, superficial posterior, and deep posterior compartments. The anterior compartment of the leg is supplied by the deep fibular nerve (deep peroneal nerve), a branch of the common fibular nerve. The compartment contains muscles that are dorsiflexors and participate in inversion and eversion of the foot. In this article, we shall look at the attachments, actions and innervation of the muscles in the posterior compartment of the leg. They are innervated by the tibial nerve, a terminal branch of the sciatic nerve. extensor digitorum longus, extensor hallucis longus, tibialis anterior, anterior tibial artery, anterior tibial nerve.
Collectively, the muscles in this area plantarflex and invert the foot. Inferior third of anterior surface of fibula and interosseous membraneĭorsiflexes ankle and aids in eversion of foot The posterior leg is the largest of the three compartments. Middle and distal phalanges of lateral four digitsĮxtends lateral four digits and dorsiflexes ankle Lateral condyle of tibia and superior three quarters of medial surface of fibula and interosseous membrane Medial gastrocnemius muscle: This calf muscle travels up the lower leg from the Achilles tendon to a boney prominence below and slightly behind the adductor tubercle. Middle part of anterior surface of fibula and interosseous membraneĭorsal aspect of base of distal phalanx of great toe (hallux) Adductor magnus muscle: This muscle runs along the side of the leg and inserts near a boney bump called the adductor tubercle on the medial femoral condyle. Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal Lateral condyle and superior half of lateral surface of tibia and interosseous membrane