Although the history of mankind has been thousands of years, no one fully understands why people dream. Duke of Zhou, a book about dreams, existed thousands of years ago in China, but now it has obvious historical limitations. If you look carefully, you will find that the interpretation of dreams is not accurate. Modern brain scientists believe that dreaming is nothing more than a by-product when the brain cleans up the memories generated during the day, or a meaningless result brought by random brain waves during sleep.
As a normal physiological phenomenon, dreams are actually essential. Some studies have found that people will produce special brain waves when dreaming, and if they are awakened immediately at this time and are not allowed to continue dreaming, people will repeatedly have abnormalities in blood pressure, pulse and body temperature. It can also cause anxiety, tension, irritability, perceptual hallucinations, memory disorders and so on. Therefore, normal dream activity is of great significance to ensure the normal activity of the body.
It is generally believed that everyone dreams every night, just because the memory function and motor function of the brain are "turned off" when they are asleep, so the dreams they have during this time will not be remembered. Dreams before waking up often have a certain impression because of the gradual recovery of brain function. So, do you remember that dreams are normal?
In fact, this is all caused by visual sense. Simply put, it is a "short circuit" in the brain circuit responsible for generating memories, which makes us think that the scene in front of us is seen before or in a dream. But in fact, it really happened. This situation is actually more common in epileptic patients. The difference is that epileptic people will have obvious influence, while normal people will only be confused for a short time.