Site of compression

Question 1

L3 nerve root compression

Answer 1

Sensory loss over anterior thigh
Weak quadriceps
Reduced knee reflex
Positive femoral stretch test

Question 2

L4 nerve root compression

Answer 2

Sensory loss anterior aspect of knee
Weak quadriceps
Reduced knee reflex
Positive femoral stretch test

Question 3

L5 nerve root compression

Answer 3

Sensory loss dorsum of foot
Weakness in foot and big toe dorsiflexion
Reflexes intact
Positive sciatic nerve stretch test
Weakness of hip abduction and foot drop

Question 4

S1 nerve root compression

Answer 4

Sensory loss posterolateral aspect of leg and lateral aspect of foot
Weakness in plantar flexion of foot
Reduced ankle reflex
Positive sciatic nerve stretch test