Flashback (psychological phenomenon)
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A flashback is a psychological phenomenon in which someone remembers a past experience. The term is usually used only when the memory is recalled involuntarily, and/or when it is so intense that the person "relives" the experience (especially if a memory is mainly stored in the procedural memory), unable to fully recognize it as being a memory.
When it occurs involuntarily, the flashback may be due to a disorder such as post-traumatic stress disorder (PTSD), such as in cases of remembering a war trauma or sexual abuse trauma, or Hallucinogen Persisting Perception Disorder, and may be related to the use of psychedelic drugs.
See also
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