Question

Foot drop is caused by injury to which nerve involvement:

• A. Femoral nerve
• B. Tibial nerve
• C. Common peroneal nerve
• D. Sciatic nerve

Answer 1

The Correct Option is C

Foot drop is a condition characterized by the inability to lift the front part of the foot, which can cause difficulty in walking and can lead to increased risk of falls. It is most commonly caused by injury to the common peroneal nerve.

The common peroneal nerve, also known as the common fibular nerve, is a branch of the sciatic nerve. It wraps around the neck of the fibula, and injury to this nerve can lead to weakness or paralysis of the muscles that dorsiflex the foot.

When the common peroneal nerve is damaged, the following muscles are typically affected:

• Tibialis anterior: Responsible for dorsiflexion of the foot.
• Extensor digitorum longus: Helps in toe extension and assists in dorsiflexion.
• Extensor hallucis longus: Responsible for big toe extension and aids in dorsiflexion.

Thus, disruption of the common peroneal nerve results in the classic presentation of foot drop.

Nerve	Associated Movement/Condition
Common Peroneal Nerve	Foot drop