1. Gastrocnemius

2. Soleus

3. Plantaris

O: above medial condyle of femur (medial head);

above lateral condyle of femur (lateral head)

I: calcaneus (via Achilles tendon)

A: plantar flexion of foot;

knee flexion & inversion of foot (weak actions)

N: tibial nerve

B: sural branches of popliteal artery

O: soleal line of tibia & upper fibula

I: calcaneus (via Achilles tendon)

A: plantar flexion of foot;

inversion of foot (weak action)

N: tibial nerve

B: posterior tibial artery

O: distal posterolateral femur (above lateral head of gastrocnemius)

I: calcaneus (via Achilles tendon)

A: plantar flexion of foot;

knee flexion (very weak action)

N: tibial nerve

B: popliteal artery

1. Popliteus

2. Flexor hallucis longus

3. Flexor digitorum longus

4. Tibialis posterior

O: lateral femoral condyle

I: proximal posterior tibia (medial side above soleal line)

A: unlocks knee from extended position;

lateral rotation of femur on tibia or medial rotation of tibia on femur & flexion of knee

N: tibial nerve

B: inferior medial genicular artery, posterior tibial artery

Flexor hallucis longus

(Harry)

O: posterior inferior 2/3 of fibula & interosseous membrane

I: distal phalanx of big toe (plantar surface)

A: flexion of big toe;

plantar flexion & inversion of foot

N: tibial nerve

B: posterior tibial artery, peroneal artery

Flexor digitorum longus

(Dick)

O: posterior middle 1/3 of tibia

I: base of distal phalanges 2-5 (plantar surface)

A: flexion of toes 2-5;

plantar flexion & inversion of foot (weak action)

N: tibial nerve

B: posterior tibial artery

Tibialis posterior

(Tom)

O: posterior proximal 2/3 of tibia, fibula & interosseous membrane

I: fans out over plantar surface of foot

A: plantar flexion & inversion of foot

N: tibial nerve

B: posterior tibial artery

Tom

Tibialis posterior

Dick

flexor Digitorum longus

AN

posterior tibial Artery, tibial Nerve

Harry

flexor Hallucis longus