But what lies behind the unsettling feeling that you're doing something you once did when you were sleeping?Ī French study published in Brain Stimulation in 2018 gave some new insight into déjà rêvé. After all, dreams often take inspiration from your memories and real experiences. Scientists have discovered a few things about déjà vu - for instance, that it seems to happen when two different circuits in your hippocampus, the part of your brain devoted to memory and processing, activate at once. And when that same experience occurs again in the waking world, it's déjà rêvé.' One stud y published in International Journal of Dream Research in 2010 found that up to 95% of people might have experienced déjà rêvé in the past. 'It's a memory, scene or a feeling that you've experienced in a dream. 'Déjà rêvé means 'already dreamed' in French,' Sanam Hafeez, PsyD, a neuropsychologist, tells Bustle. But you may not have heard of another variety of déjà vu that's almost as weird: déjà rêvé, when you feel like you experienced something before in a dream. The phenomenon of déjà vu, the uncanny sense that you're going through a bit of history repeating, is surprisingly common. Almost everybody's experienced that creepy feeling that they've done, seen, or experienced something before - even when it's clear they probably haven't.

Jamais vu causes