Dreams
Some[
who?] believe déjà vu is the memory of
dreams. Though the majority of dreams are never remembered, a dreaming person can display activity in the areas of the brain that process long-term memory. It has been speculated[
by whom?] that dreams read directly into long-term memory, bypassing short-term memory entirely. In this case, déjà vu might be a memory of a forgotten dream with elements in common with the current waking experience. This may be similar to another phenomenon known as déjà rêvé, or "already dreamed". However, later studies[
which?] on mice indicate that long-term memories must be first established as short-term memories.
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