LE Nerves

Question 1

Obturator

Answer 1

L2–L4

Pelvic surgery

DEC thigh (medial) sensation and DEC adduction.

Question 2

Femoral

Answer 2

L2–L4

Pelvic fracture

DEC thigh flexion and leg extension.

Question 3

Common peroneal

Answer 3

L4–S2

Trauma or compression of lateral aspect of leg, fibular neck fracture

• Foot drop
• “Steppage gait”
• Loss of sensation on dorsum of foot.

PED = Peroneal Everts and Dorsiflexes; if injured, foot dropPED

Question 4

Tibial

Answer 4

L4–S3

Knee trauma, Baker cyst (proximal lesion); tarsal
tunnel syndrome (distal lesion)

• Inability to curl toes and loss of sensation on sole of foot
• In proximal lesions, foot everted at rest with loss of inversion and plantar flexion.

TIP = Tibial Inverts and Plantarflexes; if injured, can’t stand on TIPtoes.

Question 5

Superior gluteal

Answer 5

L4–S1

Iatrogenic injury during intramuscular injection to upper medial gluteal region

*superolateral gluteal quadrant as intramuscular injection site to avoid nerve injury

+Trendelenburg sign/gait
Lesion is contralateral to the side of the hip that drops,
ipsilateral to extremity on which the patientstands.

Question 6

Inferior gluteal

Answer 6

L5–S2

Posterior hip dislocation

• Difficulty climbing stairs, rising from seatedposition.
• Loss of hip extension.