article_snippet.sent: It affects five in 100,000 people in Britain, rising to 23 in 100,000 in the over 50s.
article_snippet.sent: Transient global amnesia (TGA) is a type of amnesia involving the sudden, temporary disturbance in an otherwise healthy person's memory.
article_snippet.sent: The leading hypotheses are some form of epileptic event, a problem with blood circulation around, to or from the brain, or some kind of migraine-like phenomenon.
article_snippet.sent: TGA attacks are associated with some form of precipitating event in at least one-third of cases.
article_snippet.sent: In females, this event is more often of a strong emotional character; in males, this event is more often related to some physical exertion.
article_snippet.sent: The most commonly cited precipitating events include sexual intercourse, swimming in cold water or enduring other temperature changes, and emotionally traumatic or stressful events.
article_snippet.sent: TGA is most common in people between age 56 and 75, with the average age of a person experiencing TGA being approximately 62.