What is Deja Vu?

Answer 1

RAYNPETAL== love your screen name
##### could have sworn I'd answered this question before. However, having scoured the files, I guess it just seems like I did. Is this a déjà vu experience? No, this is an out-to-lunch experience. I feel it's important to make these fine distinctions lest the meaning of this too casually flung about term become even more muddled in the popular mind.

The definition of déjà vu commonly cited in the medical literature these days is "subjectively inappropriate impressions of familiarity of the present with an undefined past." This definition unfortunately sucks, since it requires you to understand the thing being defined before you can understand the definition.

A better take on it is that déjà vu is the uncanny sensation that you are reliving some unknown past experience. I throw the word uncanny in there because it exudes the musty air of cheap paperbacks we like to cultivate in this column and also because an essential feature of déjà vu is that it seems intensely strange at the time.

The other essential feature is that the relived past experience is unknown--you cannot recall having previously had the experience, and indeed you may realize that it's impossible for you to have had it. You just somehow feel that you have.

The déjà vu phenomenon is a favorite of creative types. Proust mentions it, fittingly, in Remembrance of Things Past. In David Copperfield Dickens has his title character say, "He seemed to swell and grow before my eyes; the room seemed full of the echoes of his voice; and the strange feeling (to which no one is quite a stranger) that all this had occurred before, at some indefinite time, and that I knew what he was going to say next, took possession of me."

Depending on the survey, anywhere from 30 to 96 percent of respondents report having experienced déjà vu. But one suspects the high-end figures are a function of having worded the question too vaguely. Déjà vu doesn't mean merely going through the same situation twice, as many journalists seem to think. Nor should it be confused with other mental hiccups such as flashbacks, precognition (the sense that the present situation has been foretold), and so on.

Déjà vu is said to occur more frequently in those under 30. The experience is usually brief, lasting from a few seconds to a few minutes, but in pathological cases may be prolonged. Although the term déjà vu (French for "already seen") suggests it's primarily a visual phenomenon, it can involve all the senses, which is why some prefer the term déjà vecu, "already experienced." The opposite of déjà vu is jamais vu, ("never seen"), the sensation that a familiar situation is completely strange.

What causes déjà vu? Almost all who've studied the subject have come up with their own explanations, and hey, why not? Our knowledge of the brain is so fragmentary that no explanation can be definitely discounted. Still, the chances that déjà vu is a sign of telepathy, reincarnation, or visitations by one's astral body, as some have suggested, seem pretty slim.

Among the quasi-scientific explanations, what might be called the split-image school holds that two parts of the brain participate simultaneously in the process of perception. If for some reason the impression from part A arrives in one's consciousness out of sync with the impression from part B, one has the sensation of experiencing the the thing twice.

Others explain déjà vu by analogy to a tape recorder. They propose that memory storage is accomplished by means of a "recording head" and memory recall by a "playback head." During déjà vu the two heads are erroneously situated above the same bit of mental blank tape. An experience is thus recorded and remembered simultaneously, with the result that the present is experienced as the past.

There are lots more theories, but you get the idea.

Déjà vu was a hot topic in the 1890s among French psychiatrists, who came up with the name. But later researchers dismissed it as a curiosity. The Dutch psychiatrist Herman Sno sparked a revival of interest in the 1990s, arguing that déjà vu provided insight into the functioning of both the normal and abnormal brain.

It's long been known that prolonged or frequent episodes of déjà vu are associated with various psychiatric or neurological disorders. Some now consider déjà vu, in conjunction with other symptoms, to be diagnostic of a type of epilepsy. Researchers have found that electrical stimulation of the brains of epileptic patients in some cases can trigger the déjà vu phenomenon.

Nothing you need to worry about. On the contrary, it seems pretty clear that what some consider a glimpse of the supernatural is more than likely just a cognitive burp.

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Answer 2

When i saw your question i was suddenly asking myself the same question? I really wanted to know what deja vu was, soo...i went online and looked it up!! Deja Vu is not really what poeple think it is!?!? Deja Vu is a tricking of the mind in some cases...in other cases Deja Vu is the optical and neural paths from the two eyes may be slightly different...in other words...both your eyes are different so one eye might not be interpreting the same sight that the other eye is.Or, alternately, a "newer" and "older" brain processing method might be responsible. Most poeple think Deja Vu is when you are somplace and you feel as if you were there allready but that isn't the case....That is called Precognition.


So next time you have a Deja Vu or a Precognotion...you know what it means!!

Answer 3

Deja Vu is when You are doing something and You could have sworn you've done the exact same thing before. You can almost tell what is going to happen nest. Sometimes I have deja Vu about the same thing over and over.

Answer 4

I feel it is a transitority disconnect on your brain. For example, you may see some thing with each your eyes, but for a moment your left eye techniques it and immediately puts it into memory. A cut up 2nd later your correct eye techniques it, and it is recalled from your reminiscence. Your mind would not distinguish between a reminiscence that occurred a millisecond ago or person who occurred 40 years ago, so you get a unusual feeling that you've skilled it before. (and technically you've...Simply 1/1,000,000th of a 2d in the past) eventually the 2 sync up once more and the feeling of deja vu goes away. Does that make experience? Now not definite I defined myself good.

Answer 5

Deja Vu: (n)

1 a : the illusion of remembering scenes and events when experienced for the first time b : a feeling that one has seen or heard something before
2 : something overly or unpleasantly familiar

Answer 6

The word "deja vu" literally means "already seen" in French. Also in french is the term "Jamais vu" which describes an event filled with familiarity but you feel as though you are experiencing it for the first time.

Answer 7

Deja Vu is when your brain is working too fast. meaning the input you get from your eyes dont go through the interpretation centre in your brain, but goes straight to your memory and is stored there. Then in the next split second you see the same stuff you've just seen and think it is something you've experienced before, due to the information already being in your memory.

Answer 8

Deja Vu is when something happens to you that you had already happen in my life.Ex. I go to a party and some one says Yeah I love puppies. And a week later you go to the same place and you hear the same voice saying Yeah I love puppies.

Answer 9

Deja Vu is something where you remember something that happend and you are almost there. You are taken to that place. It's either that or that thing in the desert where you see a water fountain. I'm going to go with the first one.

Answer 10

It's a phenomenon. Your brain is a computer, and "records" situations that have happened before. When you come about a situation similar, the brain tells you your have been "through it" before. This is the layman's term to "deja vu." It has nothing to do with time travel or parallel world.

Answer 11

i've got faith that's a brief disconnect on your suggestions. as an occasion, you will desire to even see something with the two your eyes, yet for a 2d your left eye tactics it and at contemporary places it into reminiscence. A chop up 2d later your good eye tactics it, and that's recalled out of your reminiscence. Your suggestions would not distinguish between a reminiscence that happened a millisecond in the past or one that happened 40 years in the past, so which you get an odd feeling which you have experienced it previously. (and technically you have...in basic terms a million/a million,000,000th of a 2d in the past) at last the two sync up returned and the sensation of deja vu is going away. Does that make experience? unsure I defined myself nicely.