Flashcards in The Common Fibular Nerve Deck (7):
What is the sensory function of the superficial fibular nerve?
Skin over the anterolateral leg and the dorsum of the foot
What is the sensory function of the deep fibular nerve?
Skin between the first and second toes
Give four causes of damage to the common fibular nerve
Direct trauma causing a fracture of the neck of the fibula
Use of a tight plaster cast
Can be severely stretched when the knee up of is injured or dislocated
Car bumper injury where a pedestrian is struck laterally by a car bumper
What are the motor functions consequences of damage to the common fibular nerve?
Loss of ability to dorsiflex the ankle so the foot appears permanently plantarflexed -> foot drop
Weakness of ankle eversion
The toes do not clear the ground during the swing phase of walking - high steppage gait
What are the sensory functions consequences of damage to the common fibular nerve?
Loss of sensation over the dorsum of the foot and lateral side of the leg
Innervation is preserved on the medial side of the leg because it is also supplied by the saphenous nerve and the heel and sole are supplied by the tibial nerve
What is the course of the common fibular nerve?
Begins at the apex of the popliteal fossa
Follows the medial border of biceps femoris and runs over the lateral head of the gastrocnemius
It here gives rise to two cutaneous branches
It enters the lateral compartment of the leg by wrapping around the neck of the fibula
It here terminates by dividing into the superficial and deep fibular nerves