Lower Leg OIA

Gastrocnemius Origin

lateral and medial condyles of the femur

Gastrocnemius Insertion

calcaneus through the achilles tendon

Gastrocnemius Action

plantar flexes foot

assists in knee flexion

Soleus Origin

posterior tibia and fibula

Soleus Insertion

calcaneus through the achilles tendon

Soleus Action

plantar flexes foot

TIbialis Posterior Origin

posterior tibia and fibula

Tibialis Posterior Insertion

metatarsals 2-4, navicular, cunieforms, and cuboid

Tibialis Posterior Action

plantar flexion and inversion

Tibialis Anterior Origin

lateral tibia

Tibialis Anterior Insertion

first metatarsal and medial cunieform

Tibialis Anterior Action

dorsiflexion and inversion

Peroneus Longus Origin

proximal fibula, lateral condyle of the tibia

Peroneus Longus Insertion

plantar surface of first metatarsal and medial cunieform

Peroneus Longus Action

plantar flexion and eversion

Peroneus Brevis Origin

fibula

Peroneus Brevis Insertion

plantar surface of fifth metatarsal

Peroneus Brevis Action

plantar flexion and eversion

Peroneus Tertius Origin

distal fibula, interosseous membrane

Peroneus Tertius Insertion

superior aspect of fifth metatarsal

Peroneus Tertius Action

dorsiflexion and eversion

Anterior Compartment Muscles

tibialis anterior, extensor hallucis longus, extensor digitorum longus, peroneus tertius

Anterior Compartment Structures

deep peroneal nerve, anterior tibial artery and vein

Lateral Compartment Muscles

peroneal longus, peroneal brevis

Lateral Compartment Structures

superficial peroneal nerve

Deep Posterior Compartment Muscles

tibialis posterior, flexor hallucis longus, flexor digitorum longus, popliteus

Deep Posterior Compartment Structures

tibial nerve, posterior tibial artery and vein

Superficial Posterior Compartment Muscles

gastrocnemius, soleus, plantaris

Superficial Posterior Compartment Structures

medial sural cutaneous nerve