What exactly is DejaVu, like I know what it is and I’ve had it but what does it stem from? Is it neurological based off of past memories, it’s so strange to me.

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What exactly is DejaVu, like I know what it is and I’ve had it but what does it stem from? Is it neurological based off of past memories, it’s so strange to me.

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I don’t think we exactly know. But we suspect that our experience, even in each second, comes from our memory. With déjà vu, the brain sends a signal that the experience is coming from long-term memory instead of short/immediate term. So even though it’s happening now, we perceive it as something that happened in the past.