What is déjà vu?

You must be familiar with it: you are doing an activity and suddenly everything in your body is like, “I\’ve been here before!” you get a nagging sensation that screams, “I\’ve been here before!”, or you are talking to a friend and you know that this conversation is definitely not the first time, or you are traveling to a place you have never visited before and everything whispers to your brain: “I\’ve been here before”. And suddenly you know exactly what will happen next. The problem is that there is no physical proof of this fact. And when you explain this feeling to someone else, you get the sense that you must really be losing your mind, that they must think you are crazy. But why does this phenomenon occur?
Časová spirála
The word déjà vu originally comes from French and translates to “I have already seen it. Statistics show that 80-90% of the population experiences this feeling at least once in their lives, and it is strongest between the ages of 15 and 35. Scientists are constantly studying this subject and have several theories as to why this sensation occurs. One theory claims that the arrangement of the two cerebral hemispheres of the brain causes this sensation. Each of the two cerebral hemispheres records information independently. However, the cerebral hemispheres are in constant communication with each other. If there is a slight delay in this communication, the information is said to reach the dominant hemisphere twice, and we have the sensation that we have already received that information once.
Kniha deja vu
On the other hand, another theory says that it is due to fatigue, imagination, and the fact that we impose on ourselves that we should have already experienced this situation. The incidence of déjà vu is also said to be higher in more intelligent people, who may have another part of their brain stimulated, causing the phenomenon.
However, esotericists and some psychologists have also put forward a number of ideas for explanations. They believe that it may be a manifestation of memories from past lives or of the soul moving out of the body during sleep. Another possible explanation is that it is a manifestation of intuition or clairvoyance. In essence, a kind of warning to avoid what is about to happen. Which theory do you support?