Lower extremity nerves

Question 1

Obturator

Answer 1

• L2-L4

- Lesion: Pelvic surgery, less thigh sensation (medial) + less adduction

Question 2

Femoral

Answer 2

• L2-L4

- Lesion: Pelvic fracture, less thigh flexion + leg extension

Question 3

Common peroneal

Answer 3

• L4-S2
• Lesion: trama or compression of lateral aspect of leg, fibular neck fracture
• “Foot drop”-inverted and plantarflexed at rest, loss of eversion and dorsiflexion.
• “Steppage gait.”
• Loss of sensation on dorsum of foot.

Question 4

Tibial

Answer 4

• L4-S3
• Lesion: Knee trama, Baker cyst; tarsal tunnel syndrome
• inability to curl toes and loss of sensation on sole of foot.
• proximal: foot inverted at rest with loss of inversion and plantarflexion.

Question 5

Superior gluteal

Answer 5

• L4-S1

- Trendelenburg sign/gait

Question 6

Inferior gluteal

Answer 6

• L5-S2
• Loss of hip extension
• Difficulty climbing stairs, raising from seated position