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deja vu

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deja vu

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  1. You probably experienced this too… • as much as 70% of the population reported experiencing this weird feeling; • occurs most frequently in people 15-25 years old

  2. Déjà vu [Who is he] that shall speak and say, Behold, this is new? it has already been in the ages that have passed before us. Ecclesiates 1:10

  3. Some History • the term “déjà vu” was first used by Émile Boirac in his book Psychology of the Future in 1918; • earlier, such occurrences were called “false recognition”, “paramnesia”, or “promnesia”; • Florence Arneau was the first to categorize déjà vu into déjà entendu, déjà lu, and déjà éprouvé Émile Boirac

  4. Early Research and theories • the person being too tired; • the person being well-rested; • remembering parts of our forgotten dreams; • remembering parts of our dreams which represent our previous life; • recollection of another memory with a similar detail Sigmund Freud

  5. Types of déjà vu • epileptic, subjective paranormal, schizophrenic, and associative; • biological dysfunction (e.g. epilepsy), implicit familiarity, and divided perception; • ordinary, associated with a pathological condition, parapsychological, and those evoked by drugs or experimental situations; • instantaneous, continuous, and mnemonic; • chronic déjà vu

  6. Data by person’s psychological identification

  7. Current Theories • Scientific: • optical pathway delay; • parahippocampalgyrus and recognition memory; • Parapsychological: • reincarnation

  8. Optical Pathway Delay • the situation is perceived by eyes and transferred to the brain for processing using two different pathways – one for each eye; • something causes delay while transferring information; • makes the brain think that this has already happened; • possible contradiction: the case of a blind man experiencing déjà vu

  9. hippocampus and recognition memory

  10. hippocampus and Recognition memory - experiments • MIT’s Picower Institute for Learning and Memory – researchers McHugh and Tonegawa conducted an experiment on mice, some of which lacked the necessary gene to recognize the similar situation; • an experiment at Duke and Southern Methodist University involving photographs and students that were asked to concentrate on a specific detail of those photos; • Colorado State University – a word recognition test; • Anne Cleary’s research with visual fragments

  11. Reincarnation • parapsychologists’ explanation of déjà vu; • expained as recalling an episode of the previous life while experiencing déjà vu; • some famous stars claimed to have remembered their past life during their trips to other countries

  12. Related phenomena • jamais vu – “never seen”; • the brain becomes tired in a specific way, called semantic satiation; • Chris Moulin’s writing common words experience; • precognitive dreams – dreams that come true in later life; • symbolic, literal, third person, lucid

  13. Conclusion • with many explanations, most of which don’t have a proof, the overall phenomenon of déjà vu still cannot be fully explained; • no official categorizing or distinction of types of déjà vu occurred, making the only categories/types those that various people created, which can be very different from each other; • technology and medicine are still limited in their ability to research the brain and its functions

  14. Bibliography • Association for Psychological Science. "The Psychology Of Deja Vu." ScienceDaily 19 November 2008. 23 March 2011. http://www.sciencedaily.com /releases/2008/11/081118122146.htm. • Carey, Benedict. "Déjà Vu: If It All Seems Familiar, There May Be a Reason." New York Times. 14 Sept. 2004. Web. 24 Mar. 2011. <http://www.nytimes.com/2004/09/14/science/14deja.html>. • "Explaining Déjà Vu - TIME." Breaking News, Analysis, Politics, Blogs, News Photos, Video, Tech Reviews - TIME.com. 09 Aug. 2007. Web. 24 Mar. 2011. <http://www.time.com/time/magazine/article/0,9171,1651507,00.html>. • Funkhouser, Art. Personal interview. 8 Apr. 2011. • "HowStuffWorks "What Is Deja Vu?"" Howstuffworks "Science" Web. 23 Mar. 2011. <http://science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/question657.htm>. • Kurgan, Andrey. The Phenomenon of Deja Vu. St. Petersburg: DmitriyBulanin, 2010. Deja Vu. Web. 22 Mar. 2011. <http://antinom.narod.ru/dejavu2.html>. • Obringer, Lee Ann. "HowStuffWorks "Studying Déjà Vu"" Howstuffworks "Science" Web. 03 Apr. 2011. <http://science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/deja-vu2.htm>. • Obringer, Lee Ann. "HowStuffWorks "Types of Déjà Vu"" Howstuffworks "Science" Web. 03 Apr. 2011. <http://science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/deja-vu1.htm>. • “The Phenomenon of “Déjà vu” is still not explainable”. News. News of the day on the website Podrobnosti. 18 Aug. 2006. Web. 23 Mar. 2011. <http://podrobnosti.ua/health/2006/08/18/341030.html>. • Skatssoon, Judy. "Health & Medical News - Is It Really You or Jamais Vu? - 19/07/2006."ABC.net.au. 19 July 2006. Web. 03 Apr. 2011. <http://www.abc.net.au/science/news/health/HealthRepublish_1689668.htm>. • Stanton, Dawn. "Probing Question: What Causes Deja Vu?" PhysOrg.com - Science News, Technology, Physics, Nanotechnology, Space Science, Earth Science, Medicine. 12 Feb. 2010. Web. 23 Mar. 2011. <http://www.physorg.com/news185192263.html>. • University of Leeds. "A Stunning New Look At Déjà Vu." ScienceDaily 29 November 2006. 30 March 2011 <http://www.sciencedaily.com/releases/2006/11/061128140552.htm>. • Wilson, Ian. "The Anatomy of a Precognitive Dream." Dreamviews Lucid Dreaming Community & Resource. Web. 03 Apr. 2011. <http://www.dreamviews.com/f19/anatomy-precognitive-dream-100182/>. • http://en.wikipedia.org/wiki/File:Émile_Boirac_2.jpg • http://unbelievablehistory.files.wordpress.com/2010/05/freud.jpg • http://upload.wikimedia.org/wikipedia/commons/0/0e/Lobes_of_the_brain_NL.svg • http://www.med.wayne.edu/diagRadiology/Limbic%20System%20RSNA%202004/Limbic45.jpg • http://silenroc.com/dejavu/iasd06/img42.html • http://silenroc.com/dejavu/iasd06/img41.html

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