Drop foot refers to a flaccid, paralytic condition involving the muscles of the anterior compartment of the leg, which results in difficulty lifting the front part of the foot. The deformity may be caused by any lesion affecting lower motor neuron innervation to the tibialis anterior muscle or by direct injuries to the musculotendinous unit of tibialis anterior. Initial diagnosis of drop foot often is made during routine physical examination. During the swing phase of gait, patients with dorsiflexion weakness may either scrape their toe or compensate for their drop foot with increased knee and hip flexion to allow the foot to clear the ground (steppage gait). For neurologic drop foot, numbness and tingling in the lower leg, particularly on the top of the foot and ankle also can be present. Treatment of drop foot is based on the underlying disorder. For example, if drop foot is caused by a lumbar radiculopathy, treatment may involve decompression of the L4 nerve root. However, if the drop foot is caused by a nerve injury, internal neurolysis, partial neurorrhaphy, complete neurorrhaphy with suture, or autogenous nerve grafting (often with the sural nerve) can be performed. The choice of technique depends on the individual clinical scenario. For drop foot secondary to musculotendinous injury, tendon transfer surgery is frequently used to restore ankle dorsiflexion.