Why does my dream last?

Key words about dreams: nerve electricity, secretion, and stimulus. The brain secretes various chemicals during activities to promote the normal activities of healthy organs or abnormal activities of diseased organs. This is a mechanical movement, such as the natural rise of the heart. Human dreams are also caused by secretions. These secretions are excessively secreted during the day and cannot be discharged or accumulated for a long time, but they are also secreted by external stimuli during sleep. For example, it is easy to walk alone in the ice and snow when it is cold at night. These secretions are transported to all parts of the brain with blood, and react with the secretions of this part to generate new substances, which stimulate neurons to secrete chemicals, thus conducting bioelectricity (these source secretions are secreted by the brain). These secretions are usually not produced immediately, but attached to the original cells. The reason is that the brain is dormant at this time and there is no stimulus source. This stimulus can only exist. These secretions will affect the mood. General memory secretions, such as knowledge, experience and knowledge, all have background and props in dreams, and have nothing to do with "you", but only affect your thinking and not your mood. Emotional secretions directly affect your psychological factors. These are all actions, and the mechanism is that a stimulus stimulates nerve cells, causing a chain reaction, leading to the production of emotional secretions, which in turn stimulates these secretion sources to continue to secrete, leading to the recurrence of old things. Therefore, although there are few stimuli, as long as they have enough influence (your attention to the event), they will keep you in mind. These secretions (stimulus sources) are secreted when events occur, react, combine and attach or generate a part of the brain, and then decompose under certain conditions. Dreaming is a kind of virtual entity simulation. The stimulation of secretion makes your brain model events, while the events in dreams stimulate various organs of the body through nerve electricity, producing a feeling similar to what really happens, and think that the simulated stimulation of nerve electricity has indeed reached its "sports" intensity. For example, dreaming and running, when I wake up, I really wheeze, my heart beats faster, and my leg muscles are sleepy and weak, but there is no pain, because my leg muscles have never exercised, but they just contract nervously and cannot secrete lactic acid. Some people will move in their dreams, talk in their sleep, and even sleepwalk, but the electrical stimulation is relatively too large for the recipient, that is, the pressure on these stimuli is too great, resulting in knee jerk reflex movement. In this simulation, memory secretion is very important, although it only plays the role of props. Very absurd things will happen in people's dreams, but we accept them frankly. The reason, I think, is 1 because new stimuli are synthesized during the memory secretion reaction. This kind of stimulation only has the function of image characteristics, and its original secretory characteristics remain unchanged. It just synthesizes or transforms feelings, that is, it gives people an illusion. Therefore, when people dream of walking with clear steps or rising from the ground like Huang Feihong, it is a combination of illusion of flying skills and real feeling of walking. 2. The result of simultaneous stimulation of two stimuli, that is, the "hug" effect (permutation and combination), at this time, the two memory secretions do not react, only participate in stimulation, and then are metabolized. Next, I will explain several phenomena: (1) People often don't do what they want when they dream. Although there is a saying that "I think about it day by day and dream at night", the source is because ① there is too much secretion during the day, and some of it is attached to brain cells as a stimulus source; ② The intensity of events during the day is too strong, which hurts the plant nerve cells, making the plant nerve cells produce "memory" and constantly secrete mechanically, so the simulation continues. Dreaming is the brain's self-defense, regulating emotions to a balanced state. Thereby metabolizing the part of the stimulus that occupies too much "memory". What happened during the day doesn't have to appear in the dream, and it's not easy to relive what happened in the dream. Because people have been psychologically satisfied (emotionally) because of pregnancy during the day, there is often no extra secretion as a stimulus to simulate. Actually, it depends on your interest in this dream. Sometimes, if you like this dream, you may subconsciously look for it yourself, or it may not last long.