Why do people sleep at night? Why do people sleep at night

1. The role of biological clock and diurnal rhythm: within 24 hours of a day, individuals present periodic activities in life; There is almost always a certain order of when to sleep, when to eat, and when to work, and this order is almost determined by the physiological workings of the individual. This physiological role in determining an individual's cyclical life activities is called the biological clock.

The formation of the biological clock is mainly determined by the 24-hour change of the day, and there is the sun during the day, which is convenient for human work and activities; Nighttime is a good time for rest and sleep.

2. Sleep is the need to maintain and restore physical strength: sleep has the function of restoring energy and recovering fatigue, and the reason why individuals need sleep is mainly to conserve energy, so as not to overfatigue and endanger health. After daytime activities and work, the human body will produce fatigue and sleepiness, and at night, it will naturally produce the need for sleep, which has an automatic regulatory effect on maintaining the normal function of the body and mind.

3. Biological evolution theory: The reason why humans and various animals exhibit different types of sleep patterns is mainly due to long-term evolution in the process of survival.

4. Sleep at night, because at night people's brains will secrete a kind of melatonin, which has the effect of promoting sleep, but not during the day.

Sleeping is a physiological response, part of the brain's neural activity, and the result of inhibition after nerve cells in the cerebral cortex continue to be excited.

When the inhibitory effect is dominant in the cerebral cortex, the person sleeps. In life, people have work, rest, nervous activity, excitement, and inhibition. Inhibition is done to protect nerve cells so that they can be re-excited and people continue to work.

Sleep is also a metabolic process of memory cells, and aging cells input the arrangement of each memory information into the new cells for storage. These include movement, language zones, balance keys, and some past events and memories from everyday life. They are all material, so they also exist in a material way.

If a person is chronically sleep deprived, causing memory cells to be unable to live a healthy life, it is prone to certain health problems and even diseases.

Since the existence of human beings, people have lived according to the law of "working at sunrise and resting at sunset". Working and working during the day and sleeping and resting at night seems to be an ordinary phenomenon, but in fact it contains the philosophical truth that "man corresponds to heaven and earth".

Through the observation and analysis of the phenomenon of human beings working during the day and sleeping at night, the ancients believed that the formation of human sleep was the result of the body's adaptation to nature. Due to the movement of the celestial bodies, the sun and the moon, the natural world is in a state of yin and yang changes, and the most prominent manifestation is the alternation of day and night. The day is yang, and the yang is active; The night is yin, and the yin respects the main quiet of the cave.

Correspondingly, the yin and yang qi of the human body also changes with the growth and decrease of day and night, so there is an alternation of sleep and sleep. During the day, when the sun is strong, people are active and laboring; The night is cloudy, and people sleep quietly. Therefore, the human body itself is a small universe, and this small universe corresponds to the large universe of nature, that is, what the ancient philosophers called "the unity of heaven and man".

According to the verification of scientists, the best sleep time for rulers is from 23 o'clock in the evening to 6 o'clock in the morning of the next day.

The quality of sleep at night is better than the quality of sleep during the day! ~

Because our eyes can't be open all the time, we feel tired eyes at night, and we can't really open our eyes at night.

There are philosophical questions, in fact, you can feel the answer for a few nights without sleeping.