origin:lateral mid shaft of tibia

insertion: base fifth metatarsal 

action: ankle plantar flexion,eversion

innervation: superficial peroneal

Gastrocnemius

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origin: posterior surface of femoral condyles 

insertion: calcaneus via achiles heel

innvervation: tibial

action:ankle plantarflexion,knee flexion

plantaris

origin: lateral supracondylar ridge of femur

insertion: calcanuous 

innervation: tibial

action: ankle plantarflexion,knee flexion

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soleus

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origin: head and proxiaml fibula and posterior tibia

insertion:calcanous via achilles heel

innvervation: tibial

action: ankle plantarflexion

posterior tibialis

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origin:interosseus membrane and tibial and fibular shafts

insertion: tarsals and metatarsals (navicular)

action: ankle plantarflexion,inversion (supination)

innervation:tibial

flexor digitorum longus

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origin: posteromedial surface of tibia

insertion: inferior surfaces of distal phalanges of 2-5

innervation: tibial

Action: ankle plantarflexion,intertersal inversion, MP and IP flexion

flexor hallucis longus

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origin:posterior surface of fibula

insertion: inferior surface of distal phalanx of #1

innvervation: tibial

action: ankle plantarflexion,intertarsal inversion,MP and IP flexion of #1