Transient global amnesia (TGA) is a benign neurological condition in which the prominent deficit is a temporary organic amnesic syndrome. The episode of TGA is stereotyped. It usually begins suddenly, lasts for at least several hours, and resolves gradually over several hours to a day. Careful examination during an episode of TGA shows that the patient has a relatively isolated amnesic syndrome. Vision, hearing, sensation, strength, and coordination are normal. Language, spatial abilities, and general intellectual function also are normal, and the TGA patient can repeat a list of numbers or words. In contrast, the patient can recall little of any verbal or nonverbal material presented minutes before. The TGA patient often repeats the same question many times because of an inability to remember the answer that was just given. Frequently repeated questions include, "Is there something the matter with me?" and "What's wrong...