Déjà vu again

deja vù

“Surprisingly, not only is déjà vu proving an interesting window on the peculiar ways that our memory works, it is also providing a few clues about how we tell the difference between what is real, imagined, dreamed and remembered – one of the true mysteries of consciousness.” via New Scientist

The takeaway message is that deja vu is composed of distinct but related elements — recognition, the sense of familiarity, the sense of the weirdness or bizarreness of the experience, and the recognition of its impossibility — each of which has its own circuitry and neurocognitive machinery.