What Is Deja Vu and Why Do We Experience It?

Your Memory Is Correcting Itself

One of the reasons people experience déjà vu is due to something called memory mismatch, according to a study published in Frontiers in Neuroscience in 2013. The researchers note that brain regions associated with memory conflict might be behind déjà vu, and describe memory conflict as the conscious awareness of a discrepancy in memory signals being corrected. The hippocampus, according to this theory, produces déjà vu because you're remembering something slightly incorrectly.