A seizure is a sudden, uncontrolled electrical disturbance in the brain. It can cause changes in your behavior, movements or feelings, and in levels of consciousness. With a seizure, signs and symptoms can range from mild to severe and vary depending on the type of seizure. Seizure signs and symptoms may include: • Temporary confusion • A staring spell • Uncontrollable jerking movements of the arms and legs • Loss of consciousness or awareness • Cognitive or emotional symptoms, such as fear, anx