hi what causes daja vu?

Question

my mate said she just had daja vu so we were wondering is daja vu something thats happened in a dream or is it a memory we havent lived yet?

Answer 1

Misfiring neurons. Effectively a memory is being "misfiled" in your brain.

Answer 2

There are several possible explanations for what is occurring during a déjà vu experience. One possibility is simply the occasional mismatch made by the brain in its continuous attempt to create whole sensical pictures out of very small pieces of information. Looking at memory as a hologram, only bits of sensory information are needed for the brain to reconstruct entire three-dimensional images. When the brain receives a small sensory input (a sight, a smell, a sound) that is strikingly similar to such a detail experienced in the past, the entire memory image is brought forward. The brain has taken the past to be the present by virtue of one tiny bit of sensory information. It is this mismatch of past and present sensory information that causes the sense of disconcertment and unease associated with a passing déjà vu. This theory provides a satisfactory explanation for the physical effects of déjà vu. These appear to be similar to the effects of mismatch between sensory input and corollary discharge signal information to the brain. It does not, however, seem to provide sufficient answers to individual (even my own) accounts of déjà vu, where the memory image pulled up is not necessarily from a true past event.

Another explanation for déjà vu is that there is a slight malfunctioning between the long and short-term memory circuits of the brain. Somehow, specific information shortcuts its way from short to long-term memory storage, bypassing the usual mechanisms used for storage transfer. The details concerning this shortcut are not yet well understood. When this new, recent piece of information is drawn upon, the person thinks that the piece is coming from long-term storage and so must have come from the distant past. A similar theory says that the error is in the timing of the perceptive and cognitive processes. Sensory information is rerouted on its way to memory storage and, so, is not immediately perceived. This short delay causes the sensation of experiencing and remembering something at the same time, a very unsettling feeling. One other explanation is that déjà vu is actually the process of remembering memory connections, of following the impulses and synapses. All of these neurobiologically based explanations for déjà vu seem plausible and intriguing and perhaps there is some overlap or combination that accounts for the different experiences we call déjà vu.

Answer 3

I don't know about daja vu but deja vu is very common. Especially after you go on the ride at Six Flags Magic Mountain.

Answer 4

When ever I have daja vu it is because I had a very vivid dream that has come true. I was told that it is the spirits letting us know what is coming up in our life.

Answer 5

The scientific explanation for dejavu goes something like this... It's caused by a chemical imbalance in the brain. When events are occurring in the present, our brain processes the activity in a part of the brain called the amygdala. Dejavu occurs when present events are processed in a part of the brain typically used to recall past memories. The parahippocampal cortex, which is very closely connected to the hippocampus. Because the event is processed in the parahippocampal cortex, it has a past 'flavor' associated with it.

There you go. That's the gist of the scientific explanation for this phenomena. I've also read supporting materials that state that dejavu can also be triggered by transmission delays in the optic nerve. That delays between the image received by one of the eyes, can cause the brain to experience dejavu. This may be true, but does not fully explain audibly (or scent) triggered dejavu. The root cause of dejavu appears to be a chemical imbalance in the brain. The imbalance may be caused by a variety of reasons (including the optic one mentioned above). The imbalance causes memories to be processed by an inappropriate part of the brain. Processing of the data by the parahippocampal cortex gives the information a 'past flavor'. If the data had been processed correctly, by the amygdala, then it would have had the correct 'present flavor'.

Now that we've gotten the scientific part as a foundation, let's explore a little conspiracy theory. The original article that I read went into an in depth description of how these scientists had done experiments on mice (and other animals) in an attempt to prove that this chemical imbalance was the true cause of dejavu. They eventually concluded that it was in fact caused by a chemical imbalance. In their human studies, they were able to locate individuals who experienced dejavu quite often, some individuals reported experiencing dejavu hundreds of times a day. Brain scans showed these individuals to have damaged amygdala's.

Here's where the conjecture comes in. From a study of these subjects brain chemicals, these scientists could probably figure out what brain chemical regulates the information processing carried out by the brain. Specifically they could have discovered the chemical that regulates processing in the parahippocampal cortex versus the amygdala. If they were able to discover the chemical that regulated this process, they could control this process. Discovering the chemical triggers for this activity would not be an impossible task, as a matter of fact, I'm thinking that it would be rather simple, given the level of medical sophistication present in todays scientific community.

Let's go a little further. O.k. so scientists discover the chemical that triggers dejavu. Big deal, right? That's a pretty small step towards mind control. Where would you get mind control from something as benign as dejavu? Read on curious conspiracy junky. Read on.

So the amygdala controls present thoughts. Memories and information processing concerned with current events. Things that are happening now. Short term memory. The parahippocampal controls past thoughts. Memories and information processing concerned with past events. Things that happened a long time ago. Long term memory. If you try to remember the first time you rode a bicycle, your parahippocampal cortex kicks into high gear recalling those past memories. If you're trying to remember whether you just read the previous sentence (the one about riding a bicycle), your amygdala processes the data. So people have short term and long term memories. Some short term memories are seconds old, some might consider short term to be a day old. It's kind of hard to decide exactly where short term becomes long term. Some long term memories are days old, some long term memories are many years old. Some memories are so old that you cannot (practically) remember them. Do you remember your first solid food? Was it one of those little weenies? Or was it some sort of pickled vegetable? I'll bet you can't remember, can you? Some long term memories can be reclaimed through the use of hypnosis. People often remember past events while undergoing hypnosis. It's a common way to bring buried/repressed old memories to the forefront of our minds

Answer 6

There are some theories, I can't speak for everybody, only myself, but I noticed years ago that I'd dream stupid things that would then happen (like borrowing a notebook from a classmate and the notebook is red and then that happened a few days later, exactly as I dreamt it). I started keeping track of my dreams with a journal, even the stupid and mundane things, and I noticed quite a few identical experiences later. I dreamt a month ago that my sister and I were drinking margaritas and I only had pink sugar instead of salt and last week she made an impromptu visit for a week (she lives 10 hours away) and she brought a bucket of margarita mix and tequila and I only had pink sugar. Completely useless, but still kinda cool. Start keeping a dream journal and see if you have any repeat experiences.

Answer 7

i was told by my psychic i was a red indian in my previous life but untill i met this man i didnt understand why i would alwalys dream of running around a pole with feathers in my hair and with there clothes on now it makes sense and if you have a birth mark this is where you were wounded in your previous life i always have daja vu some are bad ones some are good

Answer 8

I have heard that we write our on destiny. It is called a life chart. And when a daja vu happens, it is only a reminder that we are on the right path that we have written in our charts.

Answer 9

There was a recent study on Deja Vu that indicated that it may be caused by different parts of the brain firing a split second apart. When you feel like you've experienced something before, it's actually your brain experiencing it twice, once right after the other. Weird, huh?

Answer 10

welll, don't forget it *could* have something to do with reincarnation and/or something u have dreamed. one time i dreamed about the first day of college, and when that day finally came in *real life* i felt i had experienced it already. Spooky huh? lol.

by the way, u cant have a memory of something that hasn't happened yet. Unless if ur a time-traveler and that would be a different story, LOL.

Answer 11

Its Deju vu. Its supposed to be misfiring synapses in the brain making something you have never seen/heard/smelt/whatever before, seem like a memory when it isnt.