Muscles of the Posterior Leg- Superficial Layer

Question 1

Gastrocnemius:

Medial Head

Lateral Head

Answer 1

origin: medial condyle of femur (MH), lateral condyle of femur (LH)
insertion: calcaneus via the achilles (calcaneal) tendon
innervation: tibial N.
action: flexion of the knee (weak), plantarflexion of the foot

Question 2

Plantaris

Answer 2

origin: lateral condyle of femur and joint capsule
insertion: calcaneus via the achilles (calcaneal) tendon
innervation: tibial N.
action: flexion of the knee (weak), plantarflexion of the foot

Question 3

Soleus

Answer 3

origin: soleal line of tibia, interosseous membrane and fibula
insertion: calcaneus via the achilles (calcaneal) tendon
innervation: tibial N.
action: plantarflexion of the foot