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So if the signal path to the brain has a slightly different length for the two eyes, then the brain can get signals from one of the eyes faster, process them and turn them into a memory. A possible explanation of the phenomenon could be the fact that everything seen by a person is in reality perceived independently by the two eyes. Of all the five senses it seems that déjà vu occurs only to the sense of sight. (2)While reading the different models of explanation that are used (psychodynamic model, physiological model, holographic model, dream and reincarnation, distortion of the sense of time) in discussing déjà vu, I decided to focus on the physiological explanation and the temporal perceptual disturbance. There exist seven major phenomenological classifications of the déjà vu experience: a disorder of memory, a disorder of ego state, an ego defense, a temporal perceptual disturbance, a recognition disorder, a manifestation of epileptic firing, or a subjective paranormal experience. (7)Many researchers are cautious when dealing with instances of déjà vu because of the chance the person who experienced the sensation may have read or seen something that is in his unconsciousness triggering the impression. (2)The term "already seen" was first used in 1876 by E.Letter Boirac who called it "la sensation du déjà vu." In 1896 F.L. (6) Neppe’s definition describes déjà vu as any subjectively inappropriate impression of familiarity of the present experience with an undefined past. Even though a common phenomenon, most of the studies have concentrated on clinical populations such as psychopathological patients. The concept of déjà vu is not very well studied. And surveys among random groups of population show that nearly all people experience déjà vu. But in a survey, over 80% of the participants who reported having experienced déjà vu, denied a possibly clinical condition before their déjà vu incidents, such as mental and physical fatigue, depression, stress, anger, fear. Some claim that déjà vu is signifying problems in your mental state, that you are probably losing your mind and start living in the hallucinating world of a person with mental problems. It happens to many people – you are there and it’s as if you have already been there, you know what is going to happen next and it seems a part of another life you have lived.
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Some things happen for the first time, Seem to be happening again - And so it seems that we have met before, and laughed before and loved before, But who knows where or when! (1) The smile you are smiling you were smiling then, But I can’t remember where or when. The clothes you’re wearing are the clothes you wore. We looked at each other in the same way then But I can’t remember where or when. Oh, the tricks your mind can play! It seems we stood and talked like this before. Things you do – come back to you, As though they knew the way. When you are awake The things you think come from the dreams you dream Thought has wings- And lots of things- are seldom what they seem Sometimes you think you have lived before All that you live today. Where or When (Words by Lorenz Hart, Music by Richard Rogers) Search Serendip for Other Papers | Serendip Home Pageĭoes a split reality exist? Déjà vu as a failure of the brain to put "time stamps" on memories. Web links wereĪctive as of the time the paper was posted but are not updated.
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Like other materials on Serendip, it is not intended to be "authoritative" but rather to help others further develop their own explorations. This paper reflects the research and thoughts of a student at the time the paper was written for a course at Bryn Mawr College. Does a split reality exist? Déjà vu as a failure of the brain to put "time stamps" on memories.