Pseudoseizures are a physical manifestation of an emotional disturbance. They resemble epileptic seizures, but, unlike the seizures caused by epilepsy, they are not caused by electrical disruptions in the brain. Physicians believe that pseudoseizures are psychological defense mechanisms, and may be brought on by episodes of severe stress or emotional trauma. The seizures tend to occur when patients try to suppress the trauma, often taking the person suffering with them by surprise, as do epileptic seizures.