Posterior superficial leg compartment: plantarflexion of foot

Question 1

plantaris

Answer 1

• origin: lateral epicondyle of femur
• insertion: calcaneus thru calconeal tendon
• action: weakly assists gastrocnemius in plantarflexion of foot and flexion of leg

Question 2

triceps surae: gastrocnemius

Answer 2

• origin: femur: medial head: medial condyle and popliteal surface; lateral head: lateral condyle
• insertion: calcaneus thru calconeal tendon
• action: plantarflexion of foot at ankle, flexion of leg at knee, raises heel during walking

Question 3

triceps surae: soleus

Answer 3

• origin: proximal posterior fibula, posterior head of fibula, soleal line of tibia
• insertion: calcaneus thru calconeal tendon
• action: plantarflexion of foot at ankle, postural muscle maintaning balance