With unresolved trauma, a layer of memory called implicit memory may be the primary form in which the terrifying experiences are now being stored in the brain. Implicit memory involves bodily sensations, emotions, images, thoughts, and behavioral impulses. When a cue arises, such as an external signal or internal condition, these elements of implicit memory may be activated as memory retrievals. A key issue in the brain’s memory system is that when retrieved from storage, pure implicit memory is not tagged as being from the past. Instead, it can feel as if it is happening in the present
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