What are deep and light sleep?

Deep sleep is a part of sleep, accounting for only 25% of the entire sleep time, simply put, deep sleep is your brain no longer active, sleep in a state of deep rest, sleep *** is not good, mainly depends on the length of deep sleep.

Light sleep alternates repeatedly with deep sleep in human sleep time, and human normal sleep is generally composed of light sleep period to deep sleep period and then light sleep period, so repeated several cycles. Light sleep is characterized by waking up easily and still having active brain activity, such as dreaming. If light sleep takes up too much sleep time, it is a sign that the quality of sleep is not good.

Everyone should follow the basic rules of normal sleep, if this basic rule is disordered. Judging from the examination results of the sleep instrument, normal people sometimes have inactive eyes or only slow fluctuations during sleep, which is relatively long; But sometimes the eyes move back and forth very quickly, and this period of time is relatively short, and the EEG changes differently at the same time as the eyes move slowly or quickly.

Deep sleep is to sleep deeply, light sleep is not very sound, easy to wake up the kind of people first enter deep sleep, in light sleep, deep sleep accounts for about about 90. Human sleep is rhythmic, alternating deep sleep and light sleep until you wake up. Studies have shown that during the deep sleep period, the cells of the human cerebral cortex are in a state of sufficient rest, which is extremely important for stabilizing mood, balancing the mind, and restoring energy.

At the same time, the human body can produce many antibodies to enhance the ability to fight diseases. Studies have shown that the first 3 hours of sleep are very important, as deep sleep accounts for almost 90% of these years. The normal sleep of human beings is generally composed of a light sleep period to a deep sleep period and then to a light sleep period, and so on for several cycles.

Deep Sleep During deep sleep, cells in the cerebral cortex of a person are in a state of adequate rest. Light sleep corresponds to deep sleep, and light sleep is when the cells of the human cerebral cortex are in a relatively rested state, less aware of external influences, but the brain still does not suspend frequent thinking. Dreaming is a manifestation of light sleep.

In addition, normal people sleep 8 hours a day, usually with 2 to 3 hours as the boundary, according to the law of "light sleep - deep sleep - light sleep". The time of deep sleep is mainly concentrated in the 2-3 hours after normal sleep.

Deep sleep means falling asleep, and light sleep means dreaming or thinking in a daze.

Deep sleep is when you sleep for a long time but feel like you've just fallen asleep and wake up. Light sleep is like a type of false sleep. Retain a little bit of your own consciousness.

I just fell asleep, I didn't sleep very solidly, I woke up easily, it was a light sleep, and after about half an hour, I fell asleep and fell into a deep sleep, and it was not easy to wake up at this time.

Deep sleep in the first half and light sleep in the second half.