This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Transient global amnesia (TGA) is a condition characterized by sudden onset of memory loss and confusion. During an episode of TGA, a person is not able to make new memories. The person may be disoriented in regard to time and place, but can remember who they are and can recognize family members. TGA typically lasts for several hours, but can last up to ten hours. Since no memories are made during a TGA episode, the person will never remember what happened during this period, but all other memory is usually intact. Most people have only one episode of TGA during their lifetime. The underlying cause of TGA is unclear. There is no specific treatment for TGA as it usually resolves on its own.
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