Learn more about the phenomenon of dreaming before the future (déjà vu)

Many people experience a strange feeling of wonder as they relive a certain moment that they have experienced. Scientists call this phenomenon déjà vu.

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What is Déjà vu?

During a TV show with friends, Akira O'Connor, a psychology student, suddenly experienced an extremely bizarre feeling. He described: 'A few short seconds passed, and I suddenly realized what was happening on the television screen gave me an extremely inexplicable feeling. Immediately, that feeling no longer encapsulated in the small screen, but this scene, the position I was sitting here, the exact distance between me and everything around me. It's all like a copy of some moment that's not clear by what I think I've ever experienced. '

It is just one of many experiences of such a strange feeling of resurrecting a moment in the past that scientists call déjà vu .

The French term for "ever seen" is set for a special phenomenon that many people have experienced, with about 60-70% of the world population saying they have encountered at least once in their lives. For example, when you visit a place for the first time but find it very familiar, or while talking, the order of the words, the content of the conversation and the surrounding environment make you feel like you used to once chat like that .

It is a feeling that occurs when something happens and you feel like you have gone through it, but you can't explain why, why or even make sure you haven't experienced it yet.

Before Déjà vu, this phenomenon was called by many terms such as déjà Vécu - once experienced, déjà senti - each thought, déjà visitie - who had come. In 1876, the French scientist pioneering in the study of this phenomenon named it déjà vu.

About 60-70% of the world population has experienced the feeling of déjà vu in life.(Photo: cosmosmagazine.com)

Scientific studies of déjà vu

Déjà vu is a very difficult phenomenon to study because the "unfamiliar familiar" feeling occurs only in a few short seconds, cannot be predicted or described clearly. But it is the mystery of this phenomenon that draws attention with many assumptions, from pure superstition, spirituality or scientific explanation due to malfunctions in memory, activities. complex dynamics of the subconscious .

According to the 2003 study, déjà vu occurred in both sexes at approximately the same rate and there was no difference between races, but the most common in the age of 15-25. The frequency of this phenomenon decreases with increasing age and is more common in people who often study academically, read many books and travel many places. These people are said to have the conditions to develop imagination and the ability to remember dreams higher.

Many experts believe that a familiar feeling of suspicion may be related to dopamine neurotransmitters , to a higher degree in adolescents and adolescents. This hypothesis has a special place in the series of studies on déjà vu after the unusual case of a 39-year-old male.

This man was a doctor who treated flu with amantadine and phenylpropanolamine , a drug that increased dopamine activity in the brain. Within 24 hours of starting the medicine, the repeated feeling of déjà vu with high intensity was noted at this doctor. The case study published in 2001 in this Journal of Clinical Neurology also shows that the feeling of déjà vu disappears as soon as the patient stops taking the medicine.

Déjà vu and epilepsy

Another approach that causes déjà vu phenomena comes from studies of epilepsy . The scientists found a strong connection between déjà vu sensation and seizures in temporal lobe epilepsy, which can affect hippocampus, which plays a key role in controls the short-term and long-term memory of the brain.

The temporal lobe epilepsy patients 'always experience déjà vu before the onset of seizures', reported the study published in the medical journal Neuropsychologia in 2012. The above conclusion led many experts to fake. It is possible that déjà vu, similar to seizures, may be the result of neurons in the brain signaling randomly and making healthy people feel wrong that this is a familiar memory. .

Déjà vu and nervous structure

In another groundbreaking study, scientists in the Czech Republic and the United Kingdom discovered a link between the déjà vu phenomenon and the structures in the brain, reinforcing the neurological origins of this phenomenon.

The report, published in the journal Cortex, found that the team found small structures in the temporal lobe, where memory and memory originated, of people who had encountered déjà vu significantly smaller than people. ever experienced. The more times you go through déjà vu, the smaller this structure and vice versa.

"About 130 healthy people are tested for brain structure by magnetic resonance and a method of morphological analysis of each brain region. The results are compared between people who have a feeling of déjà vu and who have never met must have this phenomenon, " said Milan expert researcher Brazdil.

According to him, déjà vu is directly linked to the function of the neural structure and this may be a "minor error in the system" due to the high agitation of the hippocampus, the effect of the change in The brain region is most sensitive and usually occurs when the nervous system is in development.

In addition to the above studies, déjà vu is also explained by various assumptions such as cognitive division theory, which naturally surrounds the subconscious when people are concentrated and neglected, talked about with the argument that you have the ability to reproduce images from past memory debris or failure of memory in trying to recall a similar experience that happened in the past that made it impossible to find The memory is appropriate to explain the feeling of suspicion experienced . But, scientists still need a lot of time to be able to decipher satisfactorily this mysterious phenomenon.