Posterior Leg- muscles

Question 1

Popliteus- origin

Answer 1

Lateral femoral condyle

Question 2

Popliteus- insertion

Answer 2

Posterior surface of proximal tibia

Question 3

Popliteus- innervation

Answer 3

Tibial nerve (L4 to S1)

Question 4

Popliteus- function

Answer 4

Stabilizes knee joint (resists lateral rotation of tibia on femur)
Unlocks knee joint (laterally rotates femur on fixed tibia)

Question 5

Flexor hallucis longus- origin

Answer 5

Posterior surface of fibula and adjacent interosseous membrane

Question 6

Flexor hallucis longus- insertion

Answer 6

Plantar surface of distal phalanx of great toe

Question 7

Flexor hallucis longus- innervation

Answer 7

Tibial nerve (S2, S3)

Question 8

Flexor hallucis longus- function

Answer 8

Flexes great toe

Question 9

Flexor digitorium longus- origin

Answer 9

Medial side of posterior surface of the tibia

Question 10

Flexor digitorium longus- insertion

Answer 10

Plantar surfaces of bases of vital phalanges of the lateral four toes

Question 11

Flexor digitorium longus- innervation

Answer 11

Tibial nerve (S2, S3)

Question 12

Flexor digitorium longus- function

Answer 12

Flexes lateral four toes

Question 13

Tibialis posterior- origin

Answer 13

Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula

Question 14

Tibialis posterior- insertion

Answer 14

Mainly to tuberosity of navicular and adjacent region of medial cuneiform

Question 15

Tibialis posterior- innervation

Answer 15

Tibial nerve (L4, L5)

Question 16

Tibialis posterior- function

Answer 16

Inversion and plantar flexion of foot; support of medial arch during walking

Question 17

Gastrocnemius- origin

Answer 17

Medial head- posterior surface of distal femur just superior to medial condyle
Lateral head- upper posterolateral surface of lateral femoral condyle

Question 18

Gastrocnemius- insertion

Answer 18

Via calcaneal tendon, to posterior surface of calcaneus

Question 19

Gastrocnemius- innervation

Answer 19

Tibial nerve (S1, S2)

Question 20

Gastrocnemius- function

Answer 20

Plantarflexes foot and flexes knee

Question 21

Plantaris- origin

Answer 21

Inferior part of lateral supracondylar line of femur and oblique popliteal ligament of knee

Question 22

Plantaris- insertion

Answer 22

Via calcaneal tendon, to posterior surface of calcaneus

Question 23

Plantaris- innervation

Answer 23

Tibial nerve (S1, S2)

Question 24

Plantaris- function

Answer 24

Plantarflexes foot and flexes knee

Question 25

Soleus- origin

Answer 25

Solid line and medial border of tibia; posterior aspect of fibular head and adjacent surfaces of neck and proximal shaft; tendinous arch between tibial and fibular attachments

Question 26

Soleus- insertion

Answer 26

Via calcaneal tendon, to posterior surface of calcaneus

Question 27

Soleus- innervation

Answer 27

Tibial nerve (S1, S2)

Question 28

Soleus- function

Answer 28

Plantarflexes the foot