Lower Limb Innervation

Question 1

Lumbar Plexus

Answer 1

from L1- L4

Question 2

Sacral Plexus

Answer 2

from L4- S4

Question 3

Lumbosacral Trunk

Answer 3

part of L4 and all of L5

part of sacral plexus

Question 4

Femoral Nerve

Answer 4

L2- L4
motor to ant thigh
cutaneous to ant and medial sides of thigh, leg, foot

Question 5

Obturator Nerve

Answer 5

L2- L4
motor to medial thigh
cutaneous to medial thigh

Question 6

Sciatic Nerve

Answer 6

L4- S3
motor to post thigh, all leg, foot
cutaneous to leg; sole and dorsum of foot

Question 7

Anterior Part of Leg

Answer 7

flex thigh at hip
extend leg at knee
femoral n

Question 8

Medial Part of Leg

Answer 8

Adducts thigh

obturator n

Question 9

Posterior Part of Leg

Answer 9

Extends thigh at hip
flex leg at knee
sciatic n

Question 10

Saphenous N

Answer 10

termination of Femoral N

inn skin of anteromedial knee, leg, foot

Question 11

Tibial N

Answer 11

L4- S3 (forms sciatic)

inn mm of post thigh, post leg, sole of foot

Question 12

Common Fibular N

Answer 12

L4- S2 (forms sciatic)

inn post thigh, lat and ant leg, dorsum of foot