Lower Extremity Blocks

Question 1

The lower extremity is innervated by two plexuses:

Answer 1

Lumbar (L1-L4)
Sacral (L4-S4)

Question 2

The lumbar plexus gives rise to six nerves:

Answer 2

Question 3

The sacral plexus gives rise to five nerves:

Answer 3

Question 4

The lumbar plexus primarily innervates _________

Answer 4

the front of the leg

Question 5

The sacral plexus primarily innervates _________

Answer 5

The back of the leg

Question 6

Which nerve is responsible for plantar flexion?

Answer 6

Tibial n

Question 7

Which nerve is responsible for dorsiflexion?

Answer 7

Peroneal

Question 8

Which nerve is responsible for ankle eversion?

Answer 8

superficial peroneal

Question 9

Which nerve is responsible for ankle inversion?

Answer 9

Deep peroneal

Question 10

Answer 10

Question 11

Which nerve controls hip flexion?

Answer 11

Femoral

Question 12

Which nerve controls knee extension?

Answer 12

Femoral

Question 13

Which nerve controls knee flexion?

Answer 13

Sciatic

Question 14

Which nerve controls hip extension?

Answer 14

Sciatic

Question 15

In ankle blocks which nerves are responsible for the following:
Heel
Lateral Aspect
Dorsum
Web

Answer 15

Heel: Tibial Nerve
Lateral : Sural
Dorsum: Superficial Peroneal
Web: Deep Peroneal

Question 16

Of the five nerves that innervate the ankle, which are ONLY sensory?

Answer 16

All the ones that start with “S”

Saphenous
Sural
Superficial Peroneal

Question 17

All the nerves that supply sensation to the ankle arise from _______ Except _______

Answer 17

All of them arise from the sciatic EXCEPT for the saphenous, which arises from the femoral

Question 18

Which nerves contribute to inversion/eversion and dorsi/plantar flexion?

Answer 18