Superficial Fibular Nerve

Question 1

Roots

Answer 1

L4-S1

Question 2

Motor functions

Answer 2

Innervates muscles in the lateral compartment of the leg
Fibularis longus
Fibularis brevis

Question 3

Sensory functions

Answer 3

Vast majority of the skin over the dorsum of the foot (apart from the webbing between the hallux and the second digit)
Also supplies the anterior and lateral aspect of the inferior third of the leg

Question 4

Superficial fibular nerve entrapment

Answer 4

Entrapment of the superficial peroneal nerve can cause pain and paraesthesia of the lower leg and dorsum of foot
Frequently arises from ankle sprains or twisting of the ankle
Can also be compressed by the deep fascia of the leg - surgical decompression is used to relieve symptoms

Question 5

Direct damage of the superficial fibular nerve

Answer 5

Damaged by fracture of the fibula or by a perforating wound to the lateral side of the leg
May result in a loss of eversion, a loss of sensation over the dorsum of the foot and anterolateral aspect of the lower leg