Déjà vu
Déjà vu French pronunciation: [deʒa vy] from
French, literally "already seen", is the phenomenon of having the
feeling that the situation currently being experienced has already been
experienced in the past.
Some times you feel like what are you doing you
have done it already sometime before or you goes some where new place but
feel's like you already have been there before. in a rearch it's estimated that
90 percent people have exprience this.
It's Déjà vu.
some people who effected with Déjà vu think that
they might be alone in the world who exprienced this. there are 5 theories
about Déjà vu we tell you about.
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1) 1st theory pointed to hinduism. In this theory
we feel this because this work we already dene in previouse life or we go on
the that place in previouse life. hindus believe in this theory that the person
ise be born for 7 times.
2) 2nd theory when we sleep then our spirit come
out of our body and done some work. so that works is stor in unconcsious mind.
then we do this work in reality we feel that we already done this before.
3) 3rd theory our mind is always thing somewhat
In mind something is always circulate and we make many pictures in mind some of
its pictures are similar to reality and
we think might be we see this before
4) In this theory we resemble to our parents our
some habits our some bodyparts our face somehow resembles to out parents than
inreality something happens to us which already done before with out parents we
think that this happen with us before.
5) in this theory in human mind there is ha vain when he pressed out mind
think that we already done this work before. Whenever our mind vain pressed or
pulled then we feel this Déjà vu.
there is a case of Déjà vu in which a 23 year old
man stuck in constant Déjà vu
Scientists believe the extraordinary case of a
23-year-old British man with "constant deja vu" may have been
triggered by anxiety. It is the first time such a link has been made. But what
is deja vu - and do we really know what causes it?
Most of us know the feeling - the fleeting
sensation that you have been somewhere or done something before, when common
sense tells you that is not possible.
The term deja vu translates literally from French
as "already seen".
Some people with persistent deja vu greet you
like an old friend, even though they've never seen you before
Dr Chris Moulin, Cognitive Neuropsychologist
According to research, about two thirds of us
experience at least one deja vu in our lifetime, yet very little is known about
what causes it.
The group of scientists from the UK, France and
Canada who studied the strange case of the man with "chronic deja vu"
think one possible cause of the phenomenon could be anxiety.
The man's condition was so persistent he avoided
watching television, listening to the radio and reading newspapers because he
felt he had "encountered it all before".
Dr Chris Moulin, a cognitive neuropsychologist at
the University of Bourgogne who worked on the study, says the man had a history
of depression and anxiety, and had once taken the drug LSD whilst at
university, but was otherwise completely healthy.
"This man was striking because he was young,
otherwise aware, but completely traumatised by this constant sensation that his
mind was playing tricks," he says.
For minutes, and sometimes even longer, the
patient would feel that he was reliving experiences.
He likened the "frightening" episodes
to being in the psychological thriller film Donnie Darko.
"There was one instance where he went to get
a haircut. As he walked in, he got a feeling of deja vu. Then he had deja vu of
the deja vu. He couldn't think of anything else," says Dr Moulin.
For eight years, the man felt "trapped in a
time loop". The more distressed he became by the experience, the worse it
seemed to get.
Haven't I read this before?
deja vuImage copyrightSCIENCE PHOTO LIBRARY
The term deja vu was coined in 1876 by the French
philosopher Emile Boirac. It is the overwhelming sense that you have already
experienced something before. But there are other, lesser known, phenomena
which are thought to be related.
Jamais vu - translated as "never seen",
this is the sense that something which should be familiar is alien, for example
a common word which suddenly seems strange.
Presque vu - translated as "almost
seen", this is the sense of being on the edge of an epiphany or
realisation, for example recalling a memory.
Déjà entendu - translated "already
heard", this is the sense of feeling sure you have heard something before,
like a snippet of conversation or a musical phrase.
Brain scans appeared normal, suggesting the cause
was psychological rather than neurological.
Whilst this case on its own does not prove a link
between anxiety and deja vu, it raises an interesting question for further
study, Dr Moulin says.
One idea is that deja vu is a sort of 'brain
twitch'
Dr Akira O'Connor, University of St Andrews
Unlike many other memory problems, deja vu seems
to occur more in young people.
People first experience deja vu at the age of
about six or seven, and it happens most often between the ages of 15 and 25,
before tailing off as people get older, according to research by Professor Alan
Brown at South Methodist University in Dallas.
There are several other theories about what
causes the sensation.
Dr Akira O'Connor, a psychologist from the
University of St Andrews, believes that in most cases it is a momentary
"misfiring" of neurons in the brain which creates false connections.
"One idea is that deja vu is a sort of
'brain twitch'. Just as we get muscle spasms, or eye twitches, it could be that
the bit of your brain which sends signals to do with familiarity and memory is
firing out of turn," he says.
He says this fits with evidence that deja vu is
more frequently experienced by people with epilepsy and dementia.
DementiaImage copyrightSCIENCE PHOTO LIBRARY
Image caption
Deja vu is more frequent for people with dementia
and epilepsy
Another theory, developed by Professor Anne Cleary
at Colorado State University, is that deja vu is the natural result of seeing
something genuinely familiar in our surroundings - such as the shape of a
structure, or the layout of a room - sparking a false memory.
She developed a computerised virtual reality
called "Deja-ville" where people navigate around similar landscapes
to test the hypothesis.
But Dr O'Connor says none of the current theories
definitively solves the mystery of deja vu - partly because its fleeting and
spontaneous nature makes it almost impossible to reliably study in lab
conditions.
"Methods of trying to induce deja vu are
pretty crude," he says.
"We've used hypnosis and experiments using
lists of words. Another method is called 'caloric stimulation'. It's just
squirting warm water into people's ears.
"It's meant to deal with various problems
like vertigo, but one of the common side effects is deja vu. People have
suggested that's because the ear canal is near the temporal lobe, which may
control it," he says.
It is not known how many people suffer from the
"chronic" version of deja vu, but Dr Moulin has encountered cases
before - with some patients even insisting they had already met him because of
their deja vu.
"People greet you like an old friend, even
though they've never seen you before. Some of them were on Skype on the other
side of the world, but they still had that sense," he says.
Since reports of the 23-year-old man appeared in
newspapers, fellow report author Dr Christine Wells, from Sheffield Hallam
University, says more people are coming forward.
"I've had people from Australia and America
emailing me. It appears to be something quite rare, but there are people who
say they're experiencing it, or they went through a period of it, or know
someone who has," she says.
She says it is an area which needs "a lot
more study".
But for some, it is a phenomenon that should
remain unexplained.
"I've had people say to me you don't really
believe in deja vu, do you? Like it's something paranormal," says Dr
O'Connor.
"I've had letters from some people who
believe strongly that it is something spiritual, quoting the Bible and the
Qu'ran.
"Some people say I shouldn't investigate it;
that 'explaining rainbows ruins their beauty'. Personally I've always loved
getting deja vu - and finding out what causes it just makes the experience more
beautiful."
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Regards: Mr Anonymous
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