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'''Déjà vu''' is a common phrase from the French language which translates literally into “already seen”. This is a well documented phenomenon that can commonly occur throughout both sober living and under the influence of [[hallucinogens]]. It can be described as having the strong sensation that the current event or situation has already been experienced at some point within the past when, in actuality, it hasn't.  
'''Déjà vu''' or '''Deja vu''' can be described as the sudden sensation that a current event or situation has already been experienced at some point within the past when, in actuality, it hasn't. This a common phrase from the French language which translates literally into “already seen”. It is a well documented phenomenon that can commonly occur throughout both sober living and under the influence of [[hallucinogens]].


Certain substances are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of déjà vu. This provides one with an overwhelming sense that they have “been here before”. The sensation is often accompanied by a false feeling of familiarity with the current location or setting, the current physical actions being performed, the situation as a whole or the effects of the substance itself.  
Within the context of [[psychoactive substance]] usage, many compounds are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of déjà vu. This can provide one with an overwhelming sense that they have “been here before”. The sensation is also often accompanied by a false feeling of familiarity with the current location or setting, the current physical actions being performed, the situation as a whole or the effects of the substance itself.  


This effect is often triggered despite the fact that during the experience of it one can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.
This effect is often triggered despite the fact that during the experience of it one can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.
However, it is worth noting that the experience of Déjà vu is extremely common in people who are completely sober. For example, a 2003 review found that roughly two-thirds of the general population have had déjà vu experiences.<ref>The Déjà Vu Illusion (SageJournals) | http://journals.sagepub.com/doi/10.1111/j.0963-7214.2004.00320.x</ref> Other studies confirm that déjà vu is a common experience in healthy individuals, with between 60% and 70% of individuals reporting it, particularly within those who are between the ages of 15 and 25.<ref>The Neuroscience of Déjà Vu (PsychologyToday) | https://www.psychologytoday.com/blog/brain-babble/201208/the-neuroscience-d-j-vu</ref>
Scientific explanations of déjà vu typically conclude that this state of mind is as an anomaly of memory, which creates the distinct impression that an experience is "being recalled" when it is actually occurring within the present moment.<ref>"The Meaning of Déjà Vu", Eli Marcovitz, M.D. (1952). Psychoanalytic Quarterly, vol. 21, pages: 481–489</ref><ref> The déjà vu experience, Alan S. Brown, Psychology Press, (2008), ISBN 0-203-48544-0, Introduction, page 1</ref> This explanation is supported by the fact that the sense of "recollection" at the time is strong in most cases, but the circumstances of the "previous" experience (when, where, and how the earlier experience occurred) are believed to be improbable or impossible.
Another plausible theory attributes the feeling of having previously experienced something that is currently experienced to that of having dreamt about a similar situation or place and then forgetting about it until one is mysteriously reminded of the situation or the place while awake.<ref> Lohff, David C. (2004). The Dream Directory: The Comprehensive Guide to Analysis and Interpretation. Running Press. ISBN 0-7624-1962-8.</ref>
Déjà vu is most commonly induced under the influence of moderate dosages of [[hallucinogen|hallucinogenic]] compounds such as [[cannabis]]. [[ketamine]], [[DMT]], [[DXM]] and [[psilocin]]. The effect can also be triggered by the experience of [[memory suppression|short term memory suppression]] and [[thought loops]].
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===Psychoactive substances===
===Psychoactive substances===
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*[[Deliriants#Subjective_effects|Deliriants - Subjective effects]]
*[[Deliriants#Subjective_effects|Deliriants - Subjective effects]]
[[Category:Cognitive]] [[Category:Novel]] [[Category:Effect]]
[[Category:Cognitive]] [[Category:Novel]] [[Category:Effect]]
===References===
<references/>

Revision as of 21:32, 18 December 2017

Déjà vu or Deja vu can be described as the sudden sensation that a current event or situation has already been experienced at some point within the past when, in actuality, it hasn't. This a common phrase from the French language which translates literally into “already seen”. It is a well documented phenomenon that can commonly occur throughout both sober living and under the influence of hallucinogens.

Within the context of psychoactive substance usage, many compounds are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of déjà vu. This can provide one with an overwhelming sense that they have “been here before”. The sensation is also often accompanied by a false feeling of familiarity with the current location or setting, the current physical actions being performed, the situation as a whole or the effects of the substance itself.

This effect is often triggered despite the fact that during the experience of it one can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.

However, it is worth noting that the experience of Déjà vu is extremely common in people who are completely sober. For example, a 2003 review found that roughly two-thirds of the general population have had déjà vu experiences.[1] Other studies confirm that déjà vu is a common experience in healthy individuals, with between 60% and 70% of individuals reporting it, particularly within those who are between the ages of 15 and 25.[2]

Scientific explanations of déjà vu typically conclude that this state of mind is as an anomaly of memory, which creates the distinct impression that an experience is "being recalled" when it is actually occurring within the present moment.[3][4] This explanation is supported by the fact that the sense of "recollection" at the time is strong in most cases, but the circumstances of the "previous" experience (when, where, and how the earlier experience occurred) are believed to be improbable or impossible.

Another plausible theory attributes the feeling of having previously experienced something that is currently experienced to that of having dreamt about a similar situation or place and then forgetting about it until one is mysteriously reminded of the situation or the place while awake.[5]

Déjà vu is most commonly induced under the influence of moderate dosages of hallucinogenic compounds such as cannabis. ketamine, DMT, DXM and psilocin. The effect can also be triggered by the experience of short term memory suppression and thought loops.

Psychoactive substances

Compounds within our psychoactive substance index which may cause this effect include:

See also

References

  1. ↑ The Déjà Vu Illusion (SageJournals) | http://journals.sagepub.com/doi/10.1111/j.0963-7214.2004.00320.x
  2. ↑ The Neuroscience of Déjà Vu (PsychologyToday) | https://www.psychologytoday.com/blog/brain-babble/201208/the-neuroscience-d-j-vu
  3. ↑ "The Meaning of Déjà Vu", Eli Marcovitz, M.D. (1952). Psychoanalytic Quarterly, vol. 21, pages: 481–489
  4. ↑ The déjà vu experience, Alan S. Brown, Psychology Press, (2008), ISBN 0-203-48544-0, Introduction, page 1
  5. ↑ Lohff, David C. (2004). The Dream Directory: The Comprehensive Guide to Analysis and Interpretation. Running Press. ISBN 0-7624-1962-8.
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