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It'd be neat if somebody could prove that effect by making art of the dream image and then being able to tangibly show the resemblance when they visit the place later.
Until then, though, I'm gonna assume it's something more like the brain overwriting the memory of the dream with the image of the real place after the fact, and the person having no way of knowing that happened.
It's basically just this.
The temporal lobe is responsible for locating memories in time. Sometimes it can 'relocate' a memory you're in the process of making into the past. Making you think it is a genuine past memory.
Hence dejavu.
This happens in retrospect actually. There is a not-well-understood "temporal code" that orients memories into certain chronologies. It is theorized that this temporal code is linked to the orientation of a neural pathway that encodes the memory. Think of a literal path from neuron X to neuron Y. When that particular path lights up a second time, the memory is reconstructed in the prefrontal cortex, and the temporal entry is added to the context (i.e. this happened shortly after my 12th birthday party). The pathway is thought to not be perfectly the same every time it's hit, allowing tangential memories to get tied to the same pathway, and explaining falsified facts in memory as those pathways touch unrelated ones.
DeJa Vu in particular is thought to be a pseudo random new pathway being formed that just so happens to nearly entirely overlap another memory's pathway with an earlier chronological "entry" in the brain that's fresh enough for you to know something doesn't add up. Instantly, the new memory is written as both "now" and "back then," causing DeJa Vu retroactively. It is unclear whether this erases the old memory, muddles it, or associates it with the new memory in ways that don't necessarily correlate, which might be what a "eureka" moment amounts to.
Now is the part where I admit my source is a long ago article who's title and author have themselves been overwritten in my mind. I am also not a neuroscientist. Just got the tism.
Just got the tism.
You just got it, and you're already dumping shit like this?!? Dayum, you got one helluva case there! 😁
That's what happens when you do fists full of Tylenol.
My lawyer tells me to make sure everyone understands that this is sarcasm.
I'm gonna call out whoever wrote that article, because I've literally done tests, usually it's with media. "Ope, felt myself looking at or listening to this media, let's see when it's going to happen" and it usually does pretty soon
It would be interesting to see a peer reviewed study on that sort of thing, since biases and preconceptions can really skew things.
I saw a cool video a while back where someone made an online version of that psychic card test where you guess what shape is on the card. It turned out the results skewed significantly more towards correct guesses than would be expected statistically. It was because people who weren't doing well in the first few draws were quitting out and not having their results saved, but people who got a streak of good guesses kept going.
I'm pretty sure we do that in our day-to-day lives as well. Guessing something wrong or not having a seemingly prophetic dream is unremarkable, but guessing right or having deja vu is something special that we remember.
EDIT: I think I found it: https://www.sciencedirect.com/science/article/pii/S0149763423004360
I personally have experienced it in very strange ways. Very minor things. I'll hear a hitch in playback on some video and go "huh, that's strange" as the feeling comes over me, and then something unrelated happens right after like I see someone enter the room and have this overwhelming sense that I knew that exact person would round that exact corner 5 seconds before they did. Usually the whole room comes alive in that moment as the unexpected feeling activates all my senses and I take it all in at once. It's a very bizzarre feeling, but it always seems to have that "I knew that was going to happen. I was thinking about it happening before it did." I also have insane issues with experiential memories, so those moments in particular stand out strongly.
I have this but it's places I haven't yet been.
then when eventually standing at those places I had never been, I remember my dream and like "whoa".