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Dj Vu - This article is about dj vu, the psychological phenomenon. For the Crosby, Stills, Nash & Young album, see Dj Vu (album).
The term dj vu (French: "already seen", also called promnesia) describes the experience of feeling that one has witnessed or experienced a new situation previously. The term was created by a French psychic researcher, Emile Boirac (1851-1917) in his book L' Avenir des Sciences Psychiques, which expounded upon an essay he wrote while an undergraduate French concentrator at the University of Chicago. The experience of dj vu is usually accompanied by a compelling sense of familiarity, and also a sense of "eerieness" or "strangeness". The "previous" experience is most frequently attributed to a dream, although in some cases there is a firm sense that the experience "genuinely happened" in the past. The experience of dj vu seems to be very common; in formal studies 70% or more of the population report having experienced it at least once http://www.pni.org/books/deja_vu_info.html. References to the experience of dj vu are also found in literature of the past, indicating it is not a new phenomenon. Scientific research Dj vu has been subjected in recent years to serious psychological and neurophysiological research. The most likely candidate for explanation, according to scientists in these fields, is that dj vu is not an act of "precognition" or "prophecy" but is actually an anomaly of memory; it is the impression that an experience is "being recalled" which is false. This is substantiated to an extent by the fact that in most cases the sense of "recollection" at the time is strong, but any circumstances of the "previous" experience (when, where and how the earlier experience occurred) are quite uncertain. Likewise, as time passes, subjects can exhibit a strong recollection of having the "unsettling" experience of dj vu itself, but little to no recollection of the specifics of the event(s) or circumstances they were "remembering" when they had the dj vu experience. In particular, this may result from a overlap between the neurological systems responsible for short-term memory (events which are perceived as being in the present) and those responsible for long-term memory (events which are perceived as being in the past). Links with disorders A clinical correlation has been found between the experience of dj vu and disorders such as schizophrenia and anxiety, and the likelihood of the experience increases considerably with subjects having these conditions. However, the strongest pathological association of dj vu is with temporal lobe epilepsy. This correlation has led some researchers to speculate that the experience of dj vu is possibly a neurological anomaly related to improper electrical discharge in the brain. As most people suffer a mild (ie. non-pathological) epileptic episode regularly (eg. the sudden "jolt", a hypnagogic jerk, that frequently occurs just prior to falling asleep), it is conjectured that a similar (mild) neurological aberration occurs in the experience of dj vu, resulting in an erroneous "memory". Parapsychology Dj vu is popularly associated with precognition, clairvoyance or extra-sensory perceptions, and it is frequently cited as evidence for "psychic" abilities in the general population. Non-scientific explanations attribute the experience to a "prophecy" or "vision" (most commonly delivered via a dream), or alternatively to an experience had in a past life related to a reincarnation. Similar phenomena Other psychological phenomena have been labelled jamais vu (never seen) and presque vu (almost seen). Dj vcu is the sense of already having lived through an experience. Modern usage Though still used for the true meaning as explained above, the term is also often used to sarcastically or ironically highlight something that somebody knows has happened before. External links Dj vu
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