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Recurrence is uncommon.īecause sudden memory loss is more commonly related to a disorder of the brain, I am sending you a copy of my Health Report “Stroke.” Other readers who would like a copy should send a self-addressed stamped No. Because the cause is unknown, there is no way to prevent these episodes. The condition is temporary and doesn't cause lasting damage, so it does not require treatment. Those at higher risk are those with a history of migraines and those over the age of 50. The exact cause of TGA is unknown, but there does appear to be a link between it and migraines in some patients. Certain medical procedures may also be the trigger. The most common include physical or emotional stress, such as strenuous physical activity, sudden immersion in hot or cold water and acute emotional distress, like that caused by a conflict or bad news. It is important that anyone who witnesses a person develop sudden extreme memory loss call an ambulance or get the person to a hospital immediately, because it is much more likely that a seizure or stroke caused the amnesia. Memory of events that happened during (and occasionally for a few hours prior) typically does not return however, memory of events that were forgotten before that time is eventually regained. Some also may have a racing heartbeat, cold hands and feet, sweating, trembling, headache, vomiting, nausea, dizziness, chest or neck pain, visual disturbances, flushing or chills, a fear of dying and more.Ī typical episode lasts about six hours and does not cause lasting damage. He or she must retain knowledge of personal identity and have normal cognition (naming familiar objects, following simple instructions, etc.) the event must be verified by a witness there cannot be a history of active epilepsy, a recent head injury or the presence of seizures during the episode the event cannot last more than 24 hours testing and examination will not reveal signs of brain damage and finally, the patient must experience a gradual return of memory. It is not associated with the more common causes of amnesia such as stroke.įor a positive diagnosis, the patient must meet a set of criteria. It is often accompanied by repetitive questioning. Thank you.ĭEAR READE R: Transient global amnesia (TGA) is a rare event that causes sudden, temporary loss of memory. GOTT: Could you please talk about transient global amnesia? I have never seen this discussed in your column before.
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