De Javu and its Origin
Selasa, 24 Desember 2013
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Almost
all of us have experienced what is called deja vu: a strange feeling to say
that the new events we are feeling we've actually experienced much earlier.
These events could be a new place being visited, conversations are being
conducted, or a TV show that is being watched. More surprisingly, we also often
not able to really remember when and how it occurred prior experience in
detail. All we know is the mysterious sensation that makes us not feel strange
about the new event.
The strangeness of the phenomenon of deja vu is then spawned some metaphysical theories that try to explain causality. One is the theory that deja vu is actually derived from a similar incident ever experienced by the soul in one of the previous reincarnations of life in the past. How to explain the science of psychology itself?
Associated with Age and Degenerative Diseases
At first, some scientists believe that deja vu occurs when the optical sensation received by the eye to the brain (and perceived) first rather than the same sensation received by the other eye, causing a feeling of something familiar on the actual first time seen. Theory known as "optical pathway delay" is broken when in December last year found that people can experience deja vu butapun through the sense of smell, hearing, and perabaannya.
In addition, before Chris Moulin of the University of Leeds, UK, have found also sufferers of chronic déjà vu: the people who are often able to explain in detail the events that never happened. They feel no need to watch TV because they feel have been watching the TV show before (though not yet), and they did not bother to go to the doctor to treat 'penyakit'nya because they felt it was going to a doctor and can tell you things during his visit detailed ! Instead of misperceptions or delusions, researchers began to look at the causal deja vu to the brain and our memory.
More recently, an experiment on mice might provide a new insight about the origin of deja vu true. Susumu Tonegawa, an MIT neuroscientist, bred mice lacking a number of the dentate gyrus, a small portion of the hippocampus, which is functioning normally. This section previously known to be associated with episodic memory, the memory of our personal experience. When encounter a situation, the dentate gyrus will note signs of visual, audio, smell, time, and other signs of the five senses to be matched with our episodic memory. If there is no match, this situation will be 'registered' as a new experience and recorded for future comparisons.
According Tonegawa, normal mice have the same ability as humans to match the similarities and differences between some situations. However, as has been alleged, the rats are the dentate gyrus is not functioning normally and then have difficulty in distinguishing the two situations are similar but not identical. This, he added, could explain why the experience of deja vu increases with age, or the emergence of degenerative diseases such as Alzheimer's: loss or damage to the cells in the dentate gyrus as a result of those two things make it hard to determine whether anything 'new' or 'old '.
Creating 'Deja Vu' in the Laboratory
One of the things that is difficult for researchers to unravel the mystery of deja vu is spontaneous and natural occurrences can not be predicted. A researcher can not simply ask the participants to come and 'told' they are experiencing deja vu in a sterile lab conditions. Deja vu generally occur in daily life, where it is impossible for researchers to continuously connect participants with brain scanners are bulky and heavy. In addition, the rarity of deja vu occur following the participants made anywhere at any time is not efficient and effective to do. However, some researchers have managed to simulate conditions similar to deja vu.
As reported by LiveScience, Kenneth Peller from Northwestern University found a simple way to make someone have a 'false memories'. The participants were shown a picture, but they were asked to imagine a totally different picture in their minds. After some time, the participants were then asked to choose whether a particular image they actually see or just imagined. It turned out that the pictures often only imagined participants claimed they actually saw. Therefore, deja vu may occur when by chance an event experienced by a person with the same or similar picture ever imagined.
LiveScience also reported experiments Akira O'Connor and Chris Moulin of the University of Leeds in creating the sensation of deja vu through hypnosis. The participants were first asked to recall a series of lists of words. Then they were hypnotized that they 'forget' these words. When the participants were shown a list of similar words, half of them reported a similar sensation like dejavu, while the other half are confident that they are experiencing is really deja vu. They say this happens because the brain areas associated with his familiarity plagued by hypnosis.
The strangeness of the phenomenon of deja vu is then spawned some metaphysical theories that try to explain causality. One is the theory that deja vu is actually derived from a similar incident ever experienced by the soul in one of the previous reincarnations of life in the past. How to explain the science of psychology itself?
Associated with Age and Degenerative Diseases
At first, some scientists believe that deja vu occurs when the optical sensation received by the eye to the brain (and perceived) first rather than the same sensation received by the other eye, causing a feeling of something familiar on the actual first time seen. Theory known as "optical pathway delay" is broken when in December last year found that people can experience deja vu butapun through the sense of smell, hearing, and perabaannya.
In addition, before Chris Moulin of the University of Leeds, UK, have found also sufferers of chronic déjà vu: the people who are often able to explain in detail the events that never happened. They feel no need to watch TV because they feel have been watching the TV show before (though not yet), and they did not bother to go to the doctor to treat 'penyakit'nya because they felt it was going to a doctor and can tell you things during his visit detailed ! Instead of misperceptions or delusions, researchers began to look at the causal deja vu to the brain and our memory.
More recently, an experiment on mice might provide a new insight about the origin of deja vu true. Susumu Tonegawa, an MIT neuroscientist, bred mice lacking a number of the dentate gyrus, a small portion of the hippocampus, which is functioning normally. This section previously known to be associated with episodic memory, the memory of our personal experience. When encounter a situation, the dentate gyrus will note signs of visual, audio, smell, time, and other signs of the five senses to be matched with our episodic memory. If there is no match, this situation will be 'registered' as a new experience and recorded for future comparisons.
According Tonegawa, normal mice have the same ability as humans to match the similarities and differences between some situations. However, as has been alleged, the rats are the dentate gyrus is not functioning normally and then have difficulty in distinguishing the two situations are similar but not identical. This, he added, could explain why the experience of deja vu increases with age, or the emergence of degenerative diseases such as Alzheimer's: loss or damage to the cells in the dentate gyrus as a result of those two things make it hard to determine whether anything 'new' or 'old '.
Creating 'Deja Vu' in the Laboratory
One of the things that is difficult for researchers to unravel the mystery of deja vu is spontaneous and natural occurrences can not be predicted. A researcher can not simply ask the participants to come and 'told' they are experiencing deja vu in a sterile lab conditions. Deja vu generally occur in daily life, where it is impossible for researchers to continuously connect participants with brain scanners are bulky and heavy. In addition, the rarity of deja vu occur following the participants made anywhere at any time is not efficient and effective to do. However, some researchers have managed to simulate conditions similar to deja vu.
As reported by LiveScience, Kenneth Peller from Northwestern University found a simple way to make someone have a 'false memories'. The participants were shown a picture, but they were asked to imagine a totally different picture in their minds. After some time, the participants were then asked to choose whether a particular image they actually see or just imagined. It turned out that the pictures often only imagined participants claimed they actually saw. Therefore, deja vu may occur when by chance an event experienced by a person with the same or similar picture ever imagined.
LiveScience also reported experiments Akira O'Connor and Chris Moulin of the University of Leeds in creating the sensation of deja vu through hypnosis. The participants were first asked to recall a series of lists of words. Then they were hypnotized that they 'forget' these words. When the participants were shown a list of similar words, half of them reported a similar sensation like dejavu, while the other half are confident that they are experiencing is really deja vu. They say this happens because the brain areas associated with his familiarity plagued by hypnosis.
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