Modern sleep medicine believes that normal sleep is an active process of self-control, like a busy factory at night, closely carrying out various tasks. Among them, some of the “work” perhaps you do not know. Long-term insomnia poor memory In sleep, there is a time when people will dream, eyes will keep turning, as in watching the dream scene, this time is called REM sleep. During this period, certain structures in the brain will integrate, process, categorize and store the knowledge learned during the day. After processing, the information acquired during the day is consolidated and reinforced. Therefore, people who sleep well will feel good at remembering and learn efficiently. If long-term insomnia, a person will feel that the memory is poor and the brain is not good. Often stay up late to affect the growth of children In the early stages of sleep, that is, a few hours after going to sleep, people will enter a stage of deep sleep, when a part of the brain will secrete a variety of hormones, including growth hormone secretion is very active. With the action of growth hormone, the normal height of children and adolescents who sleep well is guaranteed. If you often stay up late and lack of sleep, it will affect the secretion of growth hormone. Easy to catch a cold while sleeping We have a common sense that people are thermostatic animals. In fact, during the period of rapid eye movement sleep, that is, the stage of dreaming, albeit for only ten or twenty minutes, people and even all mammals lose thermoregulation. If the ambient temperature is cooler, the body temperature drops, and someone can catch a cold as a result, or wake up because of the cold. REM sleep is more frequent in the second half of the night, so people are more likely to be frozen awake in the second half of the night. The second half of the night is the “devil time” Many diseases, such as acute cerebrovascular disease, angina, asthma, often occur in the second half of the night, especially in the pre-dawn hours, and even deaths often occur in this time, therefore, the second half of the night is often referred to as the “devil time”. This time of crisis is most closely related to REM sleep. During this period, a person’s heart rate, blood pressure, and respiration, as well as the activity of the vegetative nervous system, undergo significant and irregular changes. These uncertain physiological states can be a risk factor for the elderly, especially the sick. Taking “Valium” after the counter-feeling does not relieve the tiredness of many people on sleeping pills, that take sleeping pills will be “stupid”, or on the drug “dependence”. These misunderstandings and the previous abuse of Valium are related. A characteristic of Valium is that it prolongs the duration of light sleep, but inhibits the emergence of deep sleep. Deep sleep is the most relaxing and relaxing sleep. Many people who take Valium will feel that they can fall asleep, but are not comfortable, and herein lies the reason. Nowadays, hypnotic drugs are being updated more quickly and there are already many new ones available.