muscles of the popliteal fossa

Question 1

What is the muscles of the popliteal fossa?

Answer 1

popliteus M

Plantaris M

Question 2

What is the origin and insertion of the popliteus muscle?

Answer 2

Origin: lateral surface of lateral femoral condyle, posterior horn of lateral meniscus

Insertion: posterior/medial tibia above soleal line (not to soleal line)

Question 3

What is the innervation popliteus muscle?

Answer 3

tibial nerve (L4, L5, S1)

Question 4

What is the action of the popliteus muscle?

Answer 4

:flexion and medial rotation of leg at knee; with foot fixed, rotates femur laterally
to unlock knee and begin flexion.

Also active in other phases of step cycle, for reasons that are not yet well understood

Question 5

What is the origin and insertion of the plantaris Muscle?

Answer 5

Origin: proximal to gastrocnemius lateral head
Insertion: calcaneal tuberosity via Achilles tendon

Question 6

What is the innervation of plantar is Muscle?

Answer 6

tibial N (S1, S2)

Question 7

What is the action of the plantar is muscle?

Answer 7

negligible flexion of knee and ankle; might prevent compression of posterior leg mm during knee flexion