posted on May, 12 2010 @ 10:40 AM
Hello and greetings fellow ATSers.
Today I would like to talk about "Déjà vu". Firstly What is Déjà vu? Deja vu is the feeling of doing or experiencing something that you believe
you have already done or experienced before. I have recently read alot of threads where people say (myself included) they have been experiencing Deja
vu alot more in the past few years. This promted me to do some reseach into this phenomenon we call "deja vu".
What I came accross was the fact that no one really knows what causes deja vu. There are apparently 40 different theories for the causes of Deja vu
these theories range from past-lifes to the brain short circuiting.
Firstly would like to dissuss a few scientific theories for the causes of Deja vu.
The Cell Phone/Divided attention Theory
The cell phone theory was the result of an experiment with subliminal suggestions. They showed photographs of various locations to a group of
students, with the plan to ask them which locations were familiar. Prior to showing them some of the photographs, however, they flashed the photos
onto the screen at subliminal speeds -- around 10 to 20 milliseconds -- which is long enough for the brain to register the photo but not long enough
for the student to be consciously aware of it. In these experiments, the images that had been shown subliminally were familiar at a much higher rate
than those that were not.
This means that when we are distracted with something else, we subliminally take in what's around us but may not truly register it consciously. Then,
when we are able to focus on what we are doing, those surroundings appear to already be familiar to us even when they shouldn't be.
The Hologram Theory
Dutch psychiatrist Hermon Sno proposed the idea that memories are like holograms, meaning that you can recreate the entire three-dimensional image
from any fragment of the whole. The smaller the fragment, however, the fuzzier the ultimate picture. Déjà vu, he says, happens when some detail in
the environment we are currently in (a sight, sound, smell, et cetera) is similar to some remnant of a memory of our past and our brain recreates an
entire scene from that fragment.
Other researchers also agree that some small piece of familiarity may be the seed that creates the déjà vu feeling. For example, you might go for a
ride with a friend in an old 1964 Plymouth and have a strong déjà vu experience without actually remembering (or even being aware of the fact) that
your grandfather had the same type of car and you're actually remembering riding in that car as a small child. Things like the smell and the look and
feel of the seat or dashboard can bring back memories you didn't even know you had.
Dual Processing (or Delayed Vision).
Another theory is based on the way our brain processes new information and how it stores long- and short-term memories. Robert Efron tested an idea at
the Veterans Hospital in Boston in 1963 that stands as a valid theory today. He proposed that a delayed neurological response causes déjà vu.
Because information enters the processing centers of the brain via more than one path, it is possible that occasionally that blending of information
might not synchronize correctly.
Efron found that the temporal lobe of the brain's left hemisphere is responsible for sorting incoming information. He also found that the temporal
lobe receives this incoming information twice with a slight (milliseconds-long) delay between transmissions -- once directly and once again after its
detour through the right hemisphere of the brain. If that second transmission is delayed slightly longer, then the brain might put the wrong timestamp
on that bit of information and register it as a previous memory because it had already been processed. That could explain the sudden sense of
"Memories" From Other Sources.
This theory proposes that we have many stored memories that come from many aspects of our lives, including not only our own experiences but also
movies, pictures we've seen and books we've read. We can have very strong memories of things we've read about or seen without actually
experiencing, and over time, these memories may be pushed back in our minds. When in we see or experience something that is very similar to one of
those memories, we might experience a feeling of déjà vu.
For example, as a child we may have seen a movie that had a scene in a famous restaurant or at a famous landmark. Then, as an adult, we visit the same
location without remembering the movie, and the location appears to be very familiar to us.
The problem with this theory is that it doesn't explain the "everyday situation" that people seem to have Deja vu in.
Deja vu is also believed to be caused/made worse by anxiety, depression, dissociative disorders, schizophrenia and epilepsy.
Basically the scietific community will place deja vu in three catagorys;
Anomaly of memory.
Déjà vu like many other experiences, (dreams, astral projection, precognition, thought healing, etc,) have been discounted or undervalued as a topic
of serious research. Nonetheless these experiences are encountered by a vast number of people and therefore worthy of study for that reason alone.
My own view is that with the increase of people experiencing Deja vu there is something odd going on whether it be within the metaphysical realm or
the result of subliminal messaging by TPTB.
There are many more theories on the subject. So please fell free to add any of your own theories.
[edit on 12-5-2010 by ALOSTSOUL]