Deja vu: literally meaning "already seen"
Deja vu: Is feeling that the situation currently being experienced has already been experienced in the past. Deja vu is feeling of familiarity, and Deja vecu(the feeling of having"already lived through" something) is a feeling of recollection. Scientific approaches reject the explanation of Deja Vu as "Precognition" or "Prophecy" but rather explain it as an anomaly of memory, which creates a distinct impression that an experience is "being recalled". 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 uncertain or believed to be impossible.
Two types of Deja Vu are suggested to exist, the pathological type of Deja Vu usually associated with Epilepsy, and the non-pathological which is a characteristic of healthy people and psychological phenomena.
A 2004 review claimed that approximately two-thirds of the population have had Deja Vu experiences. Other studies confirm that Deja Vu is a common experience in healthy individuals, with between 31% and 96% of individuals reporting it. Deja Vu experiences that are unusually prolonged or frequent, or in association with other symptoms such as hallucinations may be an indicator of neurological or psychiatric illness.
The phrase comes from French, literally meaning "already seen".
Early researchers tried to establish a link between Deja Vu and mental disorders such as anxiety, Dissociative identity disorder and schizophrenia but failed to find correlations between Deja Vu and schizophrenia.
The strongest pathological association of Deja Vu is with Temporal lobe epilepsy. This correlation has led some researchers to speculate that the experience of Deja Vu is possible a neurological anomaly related to improper electrical discharge in the brain, creating a strong sensation that an event or experience currently being experienced has already been experienced in the past. As most people suffer a mild epileptic episode regularly a hypnagogic jerk, the sudden "Jolt" that frequently, but not always, occurs just prior to falling asleep, it is conjectured that a similar neurological aberration occurs in the experience of Deja Vu, resulting in an erroneous sensation of memory. Scientists have even looked into genetics when considering Deja Vu. Although there is not currently a gene associated with Deja Vu, the LGii gene on Chromosome 10 is being studied for a possible link. Certain forms of the gene are associated with a mild form of epilepsy an, though by no means a certainty, Deja Vu, along with jamais vu, occurs often enough during seizures(such as simple partial seizures) that researchers have reason to suspect a link. A 2008 study found that Deja Vu experiences are unlikely to be pathological Dissociative experiences.
Memory-Based Explanation:
Research has associated Deja Vu experiences with good memory functions. The similarity between a Deja Vu eliciting stimulus and an exciting, or non- existing but different, memory trace may lead to the sensation that an event or experience currently being experienced has already been experienced in the past. Thus, encountering something that evokes the implicit associations of an experience or sensation that cannot be remembered may lead to Deja Vu.
In an effort to reproduce the sensation experimentally, Banister and Zangwill(1941) used hypnosis to give participants posthypnotic amnesia for material they had already seen. When this was later re-encountered, the restricted activation caused thereafter by the posthypnotic amnesia resulted in 3 of the 10 participants reporting what the authors termed "Paramnesias".
Memory-based explanations may lead to the development of a number of non- invasive experimental methods by which a long sought-after analog of Deja Vu can be reliably produced that would allow it to be tested under well-controlled experimental condition. Cleary suggests that Jeja Vu may be a form of familiarity-based recognition(recognition that we based on a feeling that an event or experience currently being experienced has already been experienced in the past) and that laboratory method of probing familiarity-based recognition hold promise for probing Deja Vu in a laboratory setting.
Another possible explanation for the phenomenon of Deja Vu is the occurrence of "Cryptomnesia", which information learned is forgotten but nevertheless stored in the brain, and similar occurrences invoke the contained knowledge, leading to a feeling of familiarity because the event or experience being experienced has already been experienced in the past, know as Deja Vu. Some experts suggest that memory is a process of reconstruction, rather than a recall of fixed, established events.
In 1963, Robert Efron of Boston's Veterans Hospital proposed that Deja Vu is caused by dual neurological processing caused by delayed singles. Efron found that the brain's sorting of incoming signals is done in the temporal lobe of the brain's left hemisphere. However, singles enter the temporal lobe twice before processing once from each hemisphere of the brain, normally with slight delay milliseconds between them.
Dream- Based Explanation:
One theory of Deja Vu attributes the feeling of having previously seen or experienced something that is currently being seen or experienced to that of having a dream about a similar situation or place and then forgetting about it until one seems to be mysteriously reminded of the situation or the place while awake. The spontaneity of these types of Deja Vu "moments" can catch many people off-guard, especially when they get the sensation from visiting a specific place they have been to before, to the point where they are in a temporary state of shock and disbelief.
Related terms to Deja Vu:
Jamais vu:
Jamais vu(from French, meaning"never seen") is a term in psychology which is used to describe any familiar situation which is not recognized by the observer. Often described as the opposite of Deja Vu, jamasi vu involves a sense of eeriness and the observer's impression of seeing the situation for the first time, despite commonly explained as when a person momentarily does not recognize a word, person, or place that they already know. Jamais vu is sometimes associated with certain types of Aphasia, Amnesia, and epilepsy.
Theoretically, a jamais vu feeling in a sufferer of delirious disorders or intoxication could result in a delirious explanation of it, such as in the capgras delusion, in which the patient takes a known person for a false double or imposter. If the impostor is himself the clinical setting would be the same as the one described.
The experience has also been named "Veja Du".
Presque Vu:
From French, meaning"almost seen" is the intense feeling of being on the very brink of a powerful epiphany, insight, or revelation, without actually achieving the revelation. The feeling is often or near- associated with a frustrating, tantalizing sense of incompleteness or near completeness.
Deja Reve:
Deja Reve (from French, meaning"already dreamed") is the feeling of having already dreamed something that you are now experiencing.
Deja entendu:
(Literally" already heard") is the experience of feeling sure about having already heard something, even though the exact details are uncertain or were perhaps imagined?
The strongest pathological association of Deja Vu is with Temporal lobe epilepsy. This correlation has led some researchers to speculate that the experience of Deja Vu is possible a neurological anomaly related to improper electrical discharge in the brain, creating a strong sensation that an event or experience currently being experienced has already been experienced in the past. As most people suffer a mild epileptic episode regularly a hypnagogic jerk, the sudden "Jolt" that frequently, but not always, occurs just prior to falling asleep, it is conjectured that a similar neurological aberration occurs in the experience of Deja Vu, resulting in an erroneous sensation of memory. Scientists have even looked into genetics when considering Deja Vu. Although there is not currently a gene associated with Deja Vu, the LGii gene on Chromosome 10 is being studied for a possible link. Certain forms of the gene are associated with a mild form of epilepsy an, though by no means a certainty, Deja Vu, along with jamais vu, occurs often enough during seizures(such as simple partial seizures) that researchers have reason to suspect a link. A 2008 study found that Deja Vu experiences are unlikely to be pathological Dissociative experiences.
Memory-Based Explanation:
Research has associated Deja Vu experiences with good memory functions. The similarity between a Deja Vu eliciting stimulus and an exciting, or non- existing but different, memory trace may lead to the sensation that an event or experience currently being experienced has already been experienced in the past. Thus, encountering something that evokes the implicit associations of an experience or sensation that cannot be remembered may lead to Deja Vu.
In an effort to reproduce the sensation experimentally, Banister and Zangwill(1941) used hypnosis to give participants posthypnotic amnesia for material they had already seen. When this was later re-encountered, the restricted activation caused thereafter by the posthypnotic amnesia resulted in 3 of the 10 participants reporting what the authors termed "Paramnesias".
Memory-based explanations may lead to the development of a number of non- invasive experimental methods by which a long sought-after analog of Deja Vu can be reliably produced that would allow it to be tested under well-controlled experimental condition. Cleary suggests that Jeja Vu may be a form of familiarity-based recognition(recognition that we based on a feeling that an event or experience currently being experienced has already been experienced in the past) and that laboratory method of probing familiarity-based recognition hold promise for probing Deja Vu in a laboratory setting.
Another possible explanation for the phenomenon of Deja Vu is the occurrence of "Cryptomnesia", which information learned is forgotten but nevertheless stored in the brain, and similar occurrences invoke the contained knowledge, leading to a feeling of familiarity because the event or experience being experienced has already been experienced in the past, know as Deja Vu. Some experts suggest that memory is a process of reconstruction, rather than a recall of fixed, established events.
In 1963, Robert Efron of Boston's Veterans Hospital proposed that Deja Vu is caused by dual neurological processing caused by delayed singles. Efron found that the brain's sorting of incoming signals is done in the temporal lobe of the brain's left hemisphere. However, singles enter the temporal lobe twice before processing once from each hemisphere of the brain, normally with slight delay milliseconds between them.
Dream- Based Explanation:
One theory of Deja Vu attributes the feeling of having previously seen or experienced something that is currently being seen or experienced to that of having a dream about a similar situation or place and then forgetting about it until one seems to be mysteriously reminded of the situation or the place while awake. The spontaneity of these types of Deja Vu "moments" can catch many people off-guard, especially when they get the sensation from visiting a specific place they have been to before, to the point where they are in a temporary state of shock and disbelief.
Related terms to Deja Vu:
Jamais vu:
Jamais vu(from French, meaning"never seen") is a term in psychology which is used to describe any familiar situation which is not recognized by the observer. Often described as the opposite of Deja Vu, jamasi vu involves a sense of eeriness and the observer's impression of seeing the situation for the first time, despite commonly explained as when a person momentarily does not recognize a word, person, or place that they already know. Jamais vu is sometimes associated with certain types of Aphasia, Amnesia, and epilepsy.
Theoretically, a jamais vu feeling in a sufferer of delirious disorders or intoxication could result in a delirious explanation of it, such as in the capgras delusion, in which the patient takes a known person for a false double or imposter. If the impostor is himself the clinical setting would be the same as the one described.
The experience has also been named "Veja Du".
Presque Vu:
From French, meaning"almost seen" is the intense feeling of being on the very brink of a powerful epiphany, insight, or revelation, without actually achieving the revelation. The feeling is often or near- associated with a frustrating, tantalizing sense of incompleteness or near completeness.
Deja Reve:
Deja Reve (from French, meaning"already dreamed") is the feeling of having already dreamed something that you are now experiencing.
Deja entendu:
(Literally" already heard") is the experience of feeling sure about having already heard something, even though the exact details are uncertain or were perhaps imagined?
No comments:
Post a Comment