Posterior Thigh, Popliteal Region, and Posterior Leg

Question 1

What are the 2 muscular branches of the sciatic nerve?

Answer 1

1. Tibial Nerve

2. Common Fibular (Peroneal) Nerve

Question 2

Biceps Femoris Long Head action

Answer 2

Knee flexion, LR
Hip extension
Assists in hip LR

Question 3

Biceps Femoris Long Head PI

Answer 3

Tibial N.

Question 4

Biceps Femoris Long Head SI

Answer 4

L5, S1, 2, 3

Question 5

Biceps Femoris Short Head action

Answer 5

Knee flexion, LR

Question 6

Biceps Femoris Short Head PI

Answer 6

Common fibular N.

Question 7

Biceps Femoris Short Head SI

Answer 7

L5, S1, 2

Question 8

Semitendinosus Action

Answer 8

Knee flexion, MR
Extend hip
Assists in hip MR

Question 9

Semitendinosus PI

Answer 9

Tibial N.

Question 10

Semitendinosus SI

Answer 10

L4, 5, S1, 2

Question 11

Semimembranosus Action

Answer 11

Knee flexion, MR
Extend hip
Assists in hip med rot

Question 12

Semimembranosus PI

Answer 12

Tibial N.

Question 13

Semimembranosus SI

Answer 13

L4, 5, S1, 2

Question 14

Gastrocnemius Medial Head Action

Answer 14

Talocrural plantar flexion
Assists in knee flexion
Subtalar joint inversion (supination)

Question 15

Gastrocnemius Medial and Lateral Head PI

Answer 15

Tibial N.

Question 16

Gastrocnemius Medial and Lateral Head SI

Answer 16

S1, 2

Question 17

Gastrocnemius Lateral Head Action

Answer 17

talocrural plantar flexion

assists in knee flexion

Question 18

Plantaris action

Answer 18

Plantar flexion

Assists in knee flexion

Question 19

Plantaris PI

Answer 19

Tibial N.

Question 20

Plantaris SI

Answer 20

L4, 5, S1, 2

Question 21

Soleus action

Answer 21

Talocrural plantar flexion

Subtalar joint inversion (supination)

Question 22

Soleus PI

Answer 22

Tibial N.

Question 23

Soleus SI

Answer 23

L5, S1, 2

Question 24

FHL Action

Answer 24

Great toe IP flexion
Assists in MP flexion
Plantar ankle flexion
Foot inversion

Question 25

FHL PI

Answer 25

Tibial N.

Question 26

FHL SI

Answer 26

L5, S1, 2

Question 27

FDL Action

Answer 27

Proximal and distal IP and MP flexion of 2-5 digits

Assists in plantar flexion of ankle and inversion of foot

Question 28

FDL PI

Answer 28

Tibial N.

Question 29

FDL SI

Answer 29

L5, S1, 2

Question 30

Tibialis Posterior Action

Answer 30

Inversion

Assists in ankle plantar flexion

Question 31

Tibialis Posterior PI

Answer 31

Tibial N.

Question 32

Tibialis Posterior SI

Answer 32

L4, 5, S1

Question 33

Popliteus Action

Answer 33

NWB: MR of tibia on the femur, knee flexion
WB: LR femur on tibia and knee flex
Helps reinforce posterior ligament of knee joint

Question 34

Popliteus PI

Answer 34

Tibial N.

Question 35

Popliteus SI

Answer 35

L4, 5, S1