Structures

  • Gastrocnemius
  • Plantaris
  • Soleus
  • Tibialis posterior

MuscleActionOriginInsertionInnervationBlood supply
Gastrocnemius- Plantarflexes foot
- Flexes knee
- Medial head: posterior of Medial femoral condyle
- Lateral head: posterior of Lateral femoral condyle
- Calcaneal tendon, to posterior surface of calcaneus- Tibial nerve; S1 ,S2- Sural branches of popliteal artery
Plantaris- Plantarflexes foot
- Flexes knee
- Inferior aspect of lateral supracondylar line of distal femur- Calcaneal tendon, to posterior surface of calcaneus- Tibial nerve; S1 ,S2- Sural arteries
Soleus- Plantarflexes the foot- Soleal line and middle third of posterior border of tibia
- Upper quarter of posterior shaft of fibula including neck
- Calcaneal tendon, to posterior surface of calcaneus- Tibial nerve; S1 ,S2- Posterior tibial
- Peroneal
- Sural arteries
Tibialis posterior- Inversion and plantarflexion of foot
-Support of medial arch of foot during walking
- Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula- Tuberosity of navicular and adjacent region of medial cuneiform- Tibial nerve: L4,L5- Sural arteries
- Peroneal artery
- Posterior tibial artery