There are also vivid descriptions of dreams in historical records, the most famous of which is the record of the German chemist Kekulé. It is said that he was very troubled because he did not understa

There are also vivid descriptions of dreams in historical records, the most famous of which is the record of the German chemist Kekulé. It is said that he was very troubled because he did not understand the structural formula of a certain substance. One night, he dreamed of a picture of a snake biting his own tail, and thus discovered the structure of the benzene ring. There is also an example in the history of medicine. This is the famous "Discovery of Dreams" by the German physiologist Otto Levy. Once, Levi had such a dream: When the vagus nerve is stimulated, its terminals release a substance that can inhibit the activity of the heart. Then, the blood from the stopped heart is collected. Since it contains inhibitory substances, if this blood is injected into the heart of another animal, the heart of that animal will also stop beating, right? It would be nice if this could be confirmed. 2. Interpretation of dreams So, early the next morning, he went to the university excitedly. In order to do this kind of experiment, he summoned the researchers. When he was about to explain it to everyone, he couldn't remember the dream last night. . Levi couldn't remember it no matter how much he tried. He thought it would be nice to have that dream again, and then he put the paper and pen next to his pillow. Fortunately, he had the same dream again. He immediately recorded the contents of his dream after waking up. When he got up early in the morning, he hurried to the university and started his "dream experiment". As a result, he achieved great success. He collected the blood of the dog that had stopped beating, and then injected it into a dog that had stopped beating. The dog's heart, therefore, the dog's heart beat sometimes slowed down and sometimes stopped. Soon, he announced the results of his experiment to the world, and this experiment was carried out around the world. However, what is incredible is that although some researchers have reached the same experimental conclusion as him, in some people's experiments, the hearts of dogs that received blood injections did not change at all. As a result, these people said that Levi was a liar, and he suffered from neurasthenia. If explained with modern knowledge, this is a very normal phenomenon. By stimulating the sympathetic nerve, the heart will be excited and the heartbeat will speed up; when the vagus nerve is stimulated, the heartbeat will slow down; if the stimulation is further enhanced, the heart will stop beating. From the above, it can be seen that people dream mainly because various emotions such as daily wishes or fears emerge unchecked during sleep. But we can also get inspiration from dreams and achieve successes such as Levi's major discoveries. Therefore, we must handle various emotions in life, not put too much pressure on ourselves, and handle various difficulties in the correct way. The second explanation (quoted from China Science and Technology News): Dreaming is a normal and essential physiological and psychological phenomenon of the human body. After a person falls asleep, a small number of brain cells are still active, which is the basis of dreams. Why do people dream, and what will happen if they don’t dream? Normal dream activity is one of the important factors to ensure the normal vitality of the body. Scientists have done some experiments to block people's dreams. That is, as soon as the dreaming brain waves appear in the sleeper, the sleeper is immediately awakened and does not allow the dream to continue. Repeatedly, it is found that deprivation of dreams will lead to a series of physiological abnormalities in the human body, such as blood pressure, pulse, body temperature, and skin. The electrical response ability of people tends to increase, and the function of the autonomic nervous system is weakened. At the same time, it can also cause a series of adverse psychological reactions in people, such as anxiety, tension, irritability, sensory hallucinations, memory impairment, disorientation, etc. Obviously, normal dream activity is one of the important factors in ensuring the normal vitality of the body. Dreams are a way of coordinating the balance of the human psychological world. Because the right brain hemisphere is dominant in dreams, and the left brain hemisphere is dominant after awakening, during the body's 24-hour day and night activities, waking and dreaming alternate. Appear, can achieve the dynamic balance of neural regulation and mental activity. Therefore, dreams are a way of coordinating the balance of the human psychological world, especially on people's attention, emotions and cognitive activities. Dreamless sleep is not only of poor quality, but also a sign of brain damage or disease. Recent research results have also confirmed this point of view, that is, dreams are the result of the brain's regulatory center balancing various functions of the body. Dreams are a sign of healthy brain development and The need to maintain normal thinking.If the brain regulation center is damaged, dreams will not be formed, or only some incomplete dream fragments will appear. If dreamless sleep occurs for a long time, people should be vigilant. Of course, long-term nightmares are often a sign of physical weakness or certain diseases.