Why do humans dream? What is the secret of human dream?

Dream is a wonderful experience, they have time strange land, sometimes feel very real. Studies have shown that all human beings in the world dream, and those who think they never dream just forget all their dreams. So the question is, in the long history of evolution, why did the human brain evolve the function of dreaming? What is the secret of human dream? It’s a pity that although we have a certain understanding of the mechanism of human dream making, we have not yet got the exact answer to why people dream. At present, people can only give some conjectures about this. Let’s select a few to introduce. < / P > < p > our perception of the outside world is actually the result of the analysis and processing of bioelectrical signals from various sensory systems by the brain. However, the human brain can not distinguish where these bioelectrical signals come from. For example, after our visual system collects the external light lines, it will convert them into corresponding bioelectrical signals and send them through the nervous system As like as two peas, we can see the scene before the brain is processed and processed by the brain. If we can copy a bioelectrical signal of a high technology and transmit it to our brain, we can still see the same scene. < / P > < p > because humans have not evolved the function of “keeping all nerve cells in a dormant state when they are asleep”, some active nerve cells will generate some random bioelectrical signals from time to time after humans fall asleep. When the brain receives these signals, it will analyze and process them as usual Numbers are usually inexplicable and disorganized, so human dreams are strange and even illogical. This hypothesis holds that the reason why the human brain evolves the function of dream is to keep the brain active when it is dormant. In short, dreams are like the “Screen Saver” of the brain. Its function is to make the brain “move” from time to time. In this way, the brain can be effectively prevented from sleeping for a long time Directly “sleep forever”. < / P > < p > obviously, it doesn’t matter what the content of the “Screen Saver” is. You can randomly extract some memory fragments from memory storage, and then combine them randomly. Of course, if a person cares about something when he is awake, the probability of such things appearing in his dream will rise sharply. < / P > < p > a person’s experience is limited after all, but his future is full of all kinds of unknowns. In order to better deal with the various scenarios that may happen in the future, the human brain has evolved the function of dreaming. In short, the human dream making mechanism is like a powerful “Simulator”, which can simulate various kinds of information fragments in the brain So that the human brain can rehearse and adapt in advance. < / P > < p > these scenes may be dangerous, beautiful, or strange. In a word, if one day, human beings encounter similar things in the real world, our brain will not “crash” because of too much stimulation. < / P > < p > when awake, the human brain will receive a large amount of information at any time, which is usually stored in the “short-term storage area” after being input into the brain. When people fall asleep, the idle brain will “sort” the information, put the useful information into the “long-term storage area”, and delete the useless information. < / P > < p > at the same time, the brain will regularly clean up the data in the past, and its goal is to clear the data that has not been used for a long time. In this process, the brain will read, store or delete all kinds of information, and the information fragments will “flash” from the human mind, and the human dream is the information fragments left behind “Shadow”. However, if we think about it carefully, we will find that they all have a common defect, that is, they do not seem to explain all dreams. What needs to be pointed out is that these views are just some reasonable assumptions put forward by people from different angles, so we can just take a look at them at will and do not take them too seriously. < / P > < p > by the way, dreaming is not an “exclusive function” evolved from our human brain. In fact, researchers have found that many animal brains have dream making mechanisms. For example, dogs often have dreams of running and barking, while cats’ dreams are more like hunting scenes. Yueshang group has become the third social e-commerce service platform listed in China after being gathered in pinduoduo