Which nerve is often assessed when evaluating for foot drop?

The peroneal nerve, also known as the common fibular nerve, is the nerve that is often assessed when evaluating for foot drop. Foot drop refers to the inability to dorsiflex the foot, which means the individual has difficulty lifting the front part of the foot. This condition is a result of weakness or paralysis that affects the muscles responsible for this movement, primarily the anterior tibial muscle.

The peroneal nerve innervates the muscles that are critical for dorsiflexion, specifically the tibialis anterior. Injury or compression of the peroneal nerve, such as from prolonged pressure on the knee or trauma, can lead to dysfunction of these muscles, resulting in foot drop. Assessment typically includes checking the strength of dorsiflexion as well as evaluating sensations in the area supplied by the peroneal nerve.

In contrast, the tibial nerve primarily innervates the muscles responsible for plantarflexion of the foot and is more involved in activities like pushing off the ground when walking or running. The femoral nerve is primarily responsible for innervating muscles involved in hip flexion and knee extension, while the ulnar nerve primarily affects the muscles of the hand and does not play a role in foot movement. Understanding the specific