Foot drop

The inability or marked weakness of active ankle dorsiflexion, typically due to paralysis or severe weakness of the dorsiflexor muscles, leading to steppage gait and toe dragging. Possible causes are peroneal nerve damage, lumbar radiculopathy, stroke, brain injury, multiple sclerosis, amyotrophic lateral sclerosis, cerebral palsy, Charcot-Marie-Tooth disease, diabetes, and muscular dystrophy.