Déjà Vu: The Science Behind

Déjà Vu: The Science Behind


Déjà vu is a French word. It means something which is “already seen”. Déjà vu is a phenomenon where you feel that you have experienced something before. It can be a new place, some event or meeting some people for the first time. The term was coined by Emile Boirac, who was a French Scientist dealing with psychic occurring.

Déjà vu can include sensational experiences such as taste, smell, hearing, sight and touching or it can be memory based where in you feel that you have witnessed a particular moment before. The feeling is otherworldly; as if someone just rang your bell. Almost 70% people in the world feel that they have witnessed this once in their life.


The occurrence of déjà vu has been firmly established with the epilepsy of the temporal lobe. According to studies, it can occur just before a seizure in the temporal lobe. People suffering from this kind of epilepsy usually encounter déjà vu during the seizures or between convulsions. However, it is not limited to people with seizures. There have been reports of déjà vu happing to people sans medical conditions as well. As a result, there is a lot of speculation as to why this kind of a phenomenon exists. A number of psychoanalysts attribute it to either wish fulfilment or simple fantasies. A number of psychiatrists also ascribe it to mismatching inside the brain neurons which invoke the brain to mistake the present for the past. Some parapsychologists also attribute déjà vu to past life echoes. There is a lot to be learnt in the field.

There are a number of explanations, both scientific and spiritual as to why déjà vu occurs.


Some of these are:

  • The psychological phenomena

A number of experts believe that déjà vu is simply a recall of memory which occurs in the brain where your subconscious memory gets active. This is why you get a sense of acquaintance with a place but you cannot really connect the dots. In reality, it does happen and what you see is true.

  • The neuro-chemical reactions

Déjà vu is also attributed to erratum in the brain. The chemical compounds get mixed up and trigger false flashes of memory which doesn’t exist. Thus, the things you recall during your momentary remembrance are actually untrue but your brain does not know this. Thus, you get the sense of being familiar with things, places or people.

  • Precognitive Encounters

A number of experts believe that what you feel to have been a memory of past, is actually a forecast of future. This theory has been confirmed to some extent in a few cases of déjà vu. The nearest possible scientific answer to this is that the people, who encounter this, usually cross timelines due to which they are able to sense things happening. This is true due to the fact that when you can feel your instincts that something is going to happen, you generate images which predict it.

  • The echoes from the past or dreams

The spiritual experts believe that there is a soul which takes up new forms. They believe in life after death and that the spirit is born as reincarnation. In such a scenario, a person who experiences déjà vu actually remembers the rewinding of the tape of the soul. For example, if you visit some very ancient place such as castle, you may get a sense of familiarity. It may be due to the fact that in some past life, you lived there or worked there. These experts believe that when you sleep, your soul travels outside your body and all its experiences get recorded as dreams. This memory does not last for long. However, if you revisit these memories such as a place or people, then you reel in with déjà vu.

In the end, it is all an enigmatic puzzle. We as humans have to evolve to a much higher state of consciousness to get answers to questions like these.