Deep Compartment Of Posterior Leg

Question 1

What are the muscles in the deep compartment of posterior leg? (4)

Answer 1

Popliteus, tibialis posterior, flexor digitorum longus, flexor hallucis longus

Question 2

What are they all innervated by?

Answer 2

Tibial nerve

Question 3

Origin of popliteus

Answer 3

Lateral condyle of femur and lateral meniscus of knee

Question 4

Insertion of popliteus

Answer 4

Proximal tibia

Question 5

Action of popliteus

Answer 5

Lateral rotation of femur, unlocks knee so flexion can occur

Question 6

Origin of tibialis posterior

Answer 6

Interosseous membrane of tibia and fibula

Question 7

Insertion of tibialis posterior

Answer 7

Plantar surfaces of medial tarsal bones

Question 8

Action of tibialis posterior

Answer 8

Inversion and plantarflexion of foot. Contributes to medial arch of foot

Question 9

Origin of flexor digitorum longus

Answer 9

Medial surface of tibia

Question 10

Insertion of flexor digitorum longus

Answer 10

Plantar surface of lateral 4 digits

Question 11

Action of flexor digitorum longus

Answer 11

Flexion of lateral 4 toes

Question 12

Origin of flexor hallucis longus

Answer 12

Posterior surface of fibula

Question 13

Insertion of flexor hallucis longus

Answer 13

Plantar surface of phalanx of great toe

Question 14

Action of flexor hallucis longus

Answer 14

Flexion of great toe