Sleep generally refers to human sleep, which is an indispensable physiological phenomenon of human beings. In a person's life, sleep accounts for nearly13 of the time, and the quality of sleep is closely related to human health, which shows the importance of sleep to everyone.
In a sense, the quality of sleep determines the quality of life. But why do people sleep? This problem is a problem that scientists have been trying to solve completely.
According to the British magazine New Scientist, scientists have put forward several theories about the causes of sleep, ranging from simple energy-saving theory to complex theory involving memory processing, and all of them have conducted comprehensive meetings and discussions on human sleep.
Everyone should have a good sleep after a busy day. Sleeping is a physiological reaction, a part of brain nerve activity, and the result of inhibition of nerve cells in cerebral cortex after continuous excitement. When inhibition is dominant in the cerebral cortex, people will sleep. People have a combination of work and rest all their lives; In neural activity, there are excitement and inhibition.
Inhibition is to protect nerve cells, make them excited again and let people continue to work. The daily sleep time must reach 1 1 hour for children,1hour for primary school students, 8 hours for junior high school students and 7 hours for senior high school students.
Sleep is also a process of memory cell metabolism: aging cells input every arrangement of memory information into new cells for storage. Including sports, language areas, balance keys, some past events and memories in daily life. They are all matter, so they also exist in the form of matter.