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Déjà vu is the feeling of certainty that one has already witnessed or experienced a current situation, even though the exact circumstances of the prior encounter are unclear and were perhapsimagined. The "previous" experience is most frequently attributed to a dream, although in some cases there is a firm sense that the experience has genuinely happened in the past

Links with disordersEarly researchers tried to establish a link between déjà vu and serious psychopathology such as schizophrenia, anxiety, and dissociative identity disorder, and failed to find the experience of somediagnostic value. There does not seem to be a special association between déjà vu and schizophrenia or other psychiatric conditions.[7] The strongest pathological association of déjà vu is with temporallobe epilepsy.[8][9] This correlation has led some researchers to speculate that the experience of déjà vu is possibly a neurological anomaly related to improper electrical discharge in the brain. Asmost people suffer a mild (i.e. non-pathological) epileptic episode regularly (e.g. a hypnagogic jerk, the sudden "jolt" that frequently, but not always, occurs just prior to falling asleep) it isconjectured that a similar (mild) neurological aberration occurs in the experience of déjà vu, resulting in an erroneous sensation of memory.


The term déjà vu is French and means, literally,"already seen." Those who have experienced the feeling describe it as an overwhelming sense of familiarity with something that shouldn't be familiar at all. Say, for example, you are traveling to Englandfor the first time. You are touring a cathedral, and suddenly it seems as if you have been in that very spot before. Or maybe you are having dinner with a group of friends, discussing some currentpolitical topic, and you have the feeling that you've already experienced this very thing -- same friends, same dinner, same topic.

As much as 70 percent of the population reports having experienced...