There are many instances of ''déjà vu'' that are disturbing and cannot be explained but some instances might be explained by the way our memory work. Most of our memory is acquired in terms of skills and know how which has to be learned. All of this memory is usefull specifically because the skills and know how to act that is learned is not random but about behavior very likely to be usefull. So we walk but do not pay much attention to it since it is mostly done automated through our body skill memory. But in some special circumstance we may pay more attention we may realized that this gesture or that type of action is not new and this may be live as a ''déjà vu''. Because 99% of our life actually are ''déjà vu'' constantly repeated but sometime we realized it and we strangely find that strange.
Déjà vu, ( i/ˌdeɪʒɑː ˈvuː/; French pronunciation: [de.ʒa.vy]) from French, literally "already seen", is the phenomenon of having the strong sensation that an event or experience currently being experienced has already been experienced in the past.[1][2][3][4] Déjà vu is caused by erroneous familiarity and déjà vécu (the feeling of having "already lived through" something[5]) by erroneous recollection.[6]
Scientific approaches reject the explanation of déjà vu as "precognition" or "prophecy", but rather explain it as an anomaly of memory, which creates a distinct impression that an experience is "being recalled".[7][8] This explanation is supported by the fact that the sense of "recollection" at the time is strong in most cases, but that the circumstances of the "previous" experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible. Two types of déjà vu are suggested to exist: the pathological type of déjà vu usually associated with epilepsy and the non-pathological which is a characteristic of healthy people and psychological phenomenon.[9][10][11][12]
A 2004 survey concluded that approximately two-thirds of the population have had déjà vu experiences.[13] Other studies confirm that déjà vu is a common experience in healthy individuals, with between 31% and 96% of individuals reporting it. Déjà vu experiences that are unusually prolonged or frequent, or in association with other symptoms such as hallucinations, may be an indicator of neurological or psychiatric illness.[14]
He told doctors that he was "trapped in a time loop" and said he felt as if he was reliving the past moment by moment.
Details of the case have been revealed in a report published by the Journal of Medical Case Reports.
It is thought that panic attacks may have triggered the phenomenon. The condition may also have been exacerbated by LSD.
For example, while on holiday in a destination that he had previously visited he reported feeling as though he had become 'trapped in a time loop'.
He reported finding these experiences very frightening. He returned to university in 2007 and he described the déjà vu episodes as becoming more intense.
déjà vu, also known as the psychology of déjà vu is called the experience of being familiar with a new moment we are living. The word comes from the French for 'already seen'. The term, as such, was created by the French psychic Émile Boirac in the early twentieth century.
As such, the déjà vu is a feeling that occasionally arises between 10 and 30 seconds. Considered alucnaciones or false memories and occurs when we do, we say or see something that gives the feeling that we have seen or done before, but that never really happened.
Thus, the déjà vu is presented as a kind of replay where a person has experiences that are sure you have happened before.
The formal name given to the déjà vu in the scientific field is paramnesia, which refers to the psychological reaction product of memory impairment, due to which a person believes that reminds situations that have never happened.
scientific explanation of déjà vu
The déjà vu occurs because the brain has multiple types of memory:
term memory, which is capable of repeating a phone number and then forget it;
the short-term memory, which is constituted by events that are perceived as belonging to the present, and that lasts a few hours;
and long-term memory, which are events that are perceived as belonging to the past, but may remain in the memory for months and even years.
In fact, the déjà vu occurs as a result of a glitch in the brain, an anomaly of memory, where the events that are happening are stored directly in memory long or short term, when the right thing would be to go to term memory , thus giving the impression that the fact has already happened before.
Types of déjà vu
Several types of déjà vu depending on the type of situation that the memory impairment is associated. Some common ones are:
Déjà visited or, in Spanish, 'visited': psychological reaction that causes the brain to transmit to the person who has been in the place where it is now, even if you have never been there.
Déjà felt or 'as meaning' experience of feeling something already felt.
Déjà vécu or 'lived': feeling of having lived the same situation before. It is the most common of the three types of experience.