Déjà vu comes from one indecent word or phrase in French which literally meaning is “ever seen”. That is, someone is having an experience that is felt by him ever experienced before.
This phenomenon (Deja vu) was first discovered and disclosed by a French scientist named Emile Boirac who have studied it in years (1851-1917) and was presented, entitled “L’Avenir des sciences Psychiques” he wrote when he was educated at University of Chicago.
The definition of déjà vu in psychiatric science, according to Dr. Vernon Neppe MD, PhD, Director of the Pacific Neuropsychiatric Institute (PNI), is a subjective influence on their perceived similarity current experience with the past that difficult to explain. While James Lampinen, professor of psychology at the University of Arkansas defines as a feeling of déjà vu was so strong on the global similarities that occur in new situations. The similarity of déjà vu experiences in this nature as a whole, until every detail of the smallest, very similar with someone ever experienced in the past. But this experience is always accompanied by feelings not real.
The experience of déjà vu is usually accompanied by a feeling of “already know” or “already know” or feel “ve ever experienced”. Often times the déjà vu experiences less enjoyable because humans like inadvertently forced to watch footage of his life that might be creepy, odd, or even absurd. Usually these experiences relate to the dream although clearly in some cases this experience “ever really happened before”.
Déjà vu has several variations, namely :
- Déjà vecu which means ever having
- Déjà senti which means thinking about
- Déjà visite a means to visit
There is also a type of déjà vu, namely :
- Déjà vu is associated with personal life (life déjà vu)
- Déjà vu is associated with a feeling (sense/feeling déjà vu)
- Déjà vu is associated with the place (place déjà vu)
- The combination of the three symptoms of déjà vu, where one feels have lived as other person in a place and the same time, even feeling the same feelings too.
Of the several variations and types of déjà vu above, the relationship that can be drawn :
- Déjà vecu is deja vu that related to personal life (life déjà vu)
- Déjà senti is deja vu that associated with a feeling (sense/feeling déjà vu)
- Déjà visite is deja vu that associated with the place (place déjà vu)
Sometimes also described as déjà vu feelings that have seen or experienced something before when people who experience it to know when he ever did. But the déjà vu is misused as a precognitive experience, feelings ever experienced something and know exactly what will happen next, and it happened.
An important issue of déjà vu is experienced something unprecedented. While an important thing from precognitive is to show something that will happen in the future, but not a thing has ever done or seen in the future.
Déjà vu is divided into 2 categories, namely :
1. Associative Déjà Vu
Types of déjà vu of the most commonly experienced by normal healthy people are associative by nature in this world. Human see, hear, smell or experiencing an event associated with a feeling that people relate to something that has been seen, heard, smelled, or experienced by humans. Scientists previously thought that this type of déjà vu is an experience of “memory base” and assume that the memory centers of the brain responsible for it.
2. Biological Déjà vu
There are also events déjà vu among those with temporary lobe epilepsy. Just before the epilepsy, patients often experience or feel déjà vu. With the classification above can identify the brain signals where this type of déjà vu begins. However, with this reason this type of déjà vu also is different from the typical of déjà vu itself. People who experience this type of déjà vu will probably believe that they have experienced the same events or circumstances earlier, compared with a fleeting feeling.
Déjà vu sense from the standpoint of psychology is an illusion like already know/already familiar with a place that was completely foreign. The emergence of these events are believed to be the result of the conditions that have been recognized, but is in a sub-threshold of consciousness. For example, when a stroll amid the city, some features look like the same appreciation that have experienced elsewhere.
The point is deja vu is a phenomenon of human brain activity associated with memory, commonly called “recall”. These explanations reinforce the fact that the “rearrangement of memory” at a given time affects the state of human consciousness. Bannister and Zangwill (1941) tried to analyze the déjà vu with the use of hypnosis in 10 subjects. It turned out that 3 of 10 of them experiencing déjà vu. Cleary (2008) proposed the hypothesis that déjà vu is a form of something that is already familiar note is called cripyamnesia something has been learned but are not stored either in the brain, but in the future memory ”open it”.
What is clear almost 70% of people have experienced déjà vu even without them knowing it, and déjà vu is not a psychological illness or disease interference with the brain, but rather a result of brain activity/memory of an object without noticing.
