Muscles of Posterior Compartment

Question 1

gastrocnemius origin

Answer 1

posterior femur, just proximal to medial and lateral condyles

Question 2

gastrocnemius insertion

Answer 2

calcaneal tuberosity through calcaneal tendon

Question 3

gastrocnemius action

Answer 3

plantar flexion of ankle, flex knee if open chain

Question 4

gastrocnemius innervation

Answer 4

tibial nerve

Question 5

gastrocnemius blood supply

Answer 5

medial head - medial sural artery, lateral head - lateral sural artery

Question 6

plantaris origin

Answer 6

lateral femoral epicondyle

Question 7

plantaris insertion

Answer 7

calcaneus anteromedial to calcaneal tendon

Question 8

plantaris action

Answer 8

weak plantar flexion of ankle, weak flexion of knee if open chain

Question 9

plantaris innervation

Answer 9

tibial nerve

Question 10

plantaris blood supply

Answer 10

superficial - lateral sural artery, deep - superior lateral genicular artery

Question 11

soleus origin

Answer 11

soleal line of tibia, posterior surface of upper 1/3 of tibia, proximal 1/3 posterior fibula

Question 12

soleus insertion

Answer 12

calcareous through calcaneal tendon

Question 13

soleus action

Answer 13

plantar flexion of ankle

Question 14

soleus innervation

Answer 14

tibial nerve

Question 15

soleus blood supply

Answer 15

popliteal artery, posterior tibial artery, peroneal artery