The importance of good sleep for health

Sleep is a spontaneous and reversible resting state that occurs periodically in higher vertebrates, which is manifested as a decrease in the body's responsiveness to external stimuli and a temporary interruption of consciousness. About 1/3 of human life is spent in sleep. When people are in a state of sleep, their brains and bodies can be rested, rested and recovered, and an appropriate amount of sleep is helpful for people's daily work and study. Scientifically improving sleep quality is the guarantee of people's normal work, study and life.
 
Basic Information
 
Chinese name: sleep, sleep
 
Foreign name: sleep
 
Reason : Organize memory
 
Category : Biological Behavior
 
sleep reason
 
   Sleep is a state in which sensory activities and motor activities are temporarily stopped due to internal needs of the body, and can be awakened immediately by giving appropriate stimulation. After people recognize the electrical activity of the brain, it is believed that sleep is the low physiological activity of animals caused by the functional activities of the brain, and appropriate stimulation can make them fully awake.
 
   Sleep is an active process. Sleep is a necessary rest for restoring energy. There is a special center to manage sleep and wakefulness. The human brain just changes its working mode during sleep, so that energy can be stored, which is conducive to the recovery of spirit and physical strength; Proper sleep is the best rest, both the foundation for maintaining health and stamina, and the guarantee of high productivity. Nerve cells with higher excitability that receive and respond to internal and external stimuli prevent unprocessed stimuli from interfering with each other, which manifests as fatigue relief. Poor sleep quality refers to the phenomenon that the shielding degree is not enough or the sleep time is not enough to fully digest the stimulation connection. Drowsiness is a pathological over-screening for too long. These are all signs of insufficient neural control. The state of the body is also restored during sleep due to the weakening of active activity.
 
   The main function of sleep is reflected in the brain, and the sleep state connects the scattered memory fragments in the brain through dreaming.
 
Physiological changes
   Sleep is often an unconsciously pleasurable state that usually occurs in bed and at night when we allow ourselves to rest. Compared with the awakened state, during sleep, people stop contacting with their surroundings, conscious awareness disappears, and they can no longer control what they say or do. In the sleep state, the muscles relax, the nerve reflexes weaken, the body temperature drops, the heartbeat slows down, the blood pressure drops slightly, the metabolism slows down, and the peristalsis of the gastrointestinal tract is also significantly weakened. At this time, it seems that the sleeping person is still and passive, but it is not. If we take an EEG on a person while he is sleeping, we will find that the electrical impulses emitted by brain cells during sleep are no weaker than when a person is awake. . This proves that the brain is not at rest. Just like a beehive at night, it looks like the bees have returned to their nests to rest, but in fact all the bees are busy all night for brewing honey.
 
   After normal adults fall asleep, they first enter the slow-wave phase, usually 1 to 2 to 3 to 4 to 3 to 2, which lasts 70 to 120 minutes. This ends the first phase transition, then starts the slow-wave phase, and transfers to the next paradoxical sleep, and so on. During the whole sleep process, there are generally 4 to 6 transitions. The slow-wave phase duration is gradually shortened, and the second phase is the main one, while the out-of-phase duration is gradually extended. Taking full-time sleep as 100%, slow-wave sleep accounts for about 80%, and paradoxical sleep accounts for 20%. The different phases of sleep and awakening states are arranged according to the time sequence of their appearance, which can be drawn into a sleep map, which can intuitively reflect the dynamic changes of each phase of sleep.