When we are tired for a day and are about to fall back on the bed to rest, the meaning is hazy, have we considered this question
How did we fall asleep? From awake to sleep, it seems that we can never recall the process, just like amnesia , Every time I wake up, I feel a sense of time travel, most people must feel this way
In order to explain the process of sleep, what I want to say next may subvert your common sense
The sleeping process that most of us understand It may be like the computer turning on and off. When you want to wake up, click on the startup and press the shutdown when you want to sleep. But in fact, under the control of the brain, a person's sleep process is much more complicated than a processor-controlled computer
In the early years, the scientific community through EEG ( brain wave image) has long proved that people's sleep is not linear from shallow to deep, but repeatedly switching different sleep modes
In fact, the process of falling asleep is a professional noun Called Sleep Onset Process/ Period (SOP). The academic community has started its research on SOP very early. Recent studies have shown that SOP is a slow or even a bit strange process.
According to scientific observations, the human sleeping process is actually divided into two modes and five stages: N1~N5. Each five stages are a cycle, and each cycle time ranges from 60-90 minutes, while an adult's standard At least five cycles must be completed within the sleep duration. It takes just 7-8 hours to finish the five cycles. is the origin of the sleep duration that adults need 8 hours.
First talk about what the sleep mode is. , In fact, it is very simple to understand, which is the different states of your body when you sleep. is rapid eye movement sleep (REM) and non-rapid eye movement sleep
people are in rapid eye movement sleep During the period, the brain waves change rapidly, and high-frequency and low-amplitude brain waves similar to those in the awake state appear. In addition to the changes in the brain waves, the eyeballs will be beating rapidly. In contrast, people are in a non-fast During eye movement sleep period, the brain wave frequency is only 1 to 2 weeks per second, but the amplitude increases significantly, showing a slow curve and no rapid eyeball beats.
Two sleep modes will alternately during the entire sleep travel
Explain the two sleep modes. Next, let’s talk about the five sleep stages of N1~N5 in detail. Among them, the magic moment of falling asleep that makes us wonder happen in these few One stage Intra-
N1 sleep start period
This stage generally symbolizes the beginning of sleep. Although you are awake, your body will relax, your breathing will slow down and feel drowsy. At this time, the brain waves will also begin to change. , frequency gradually Slow, the amplitude gradually decreases. (Do you remember when you fell asleep on KTV? That kind of sleepy but not asleep. When you wake up, you can still recall what songs the female classmate sang in the same class)
Under normal circumstances, a person is 10-26 Sleep starts in minutes, and many insomnia patients are affected by the interference of hormones in the outside world and the body, which makes it difficult to start when falling asleep. It can’t be started in the shortest 30 minutes or long 2 hours
N2 light sleep period
from this stage Really When you fall asleep, your body gradually loses the ability to respond to external stimuli, and the respiratory rate of begins to decrease . At this time, the brain waves are gradually moving irregularly, the frequency and amplitude are very large and small
N3~N4 sleep and deep sleep period
Stages 3 and 4 are sleeping stages. At this stage, the human body is fully rested and the body's functions are all Yes Reduce to the lowest indicator and gradually relax the muscles. The body's loss repair, tissue regeneration, and immune system enhancement are all at this stage
. At this time, the human consciousness is the most difficult to awaken. Even if it is forcibly awakened, it will be drowsy and unable to lift
At this time, the brain The wave changes very much, with the frequency only 1 to 2 weeks per second, but the amplitude increases significantly, showing a slow curve.The sleep in these four (N1~N4) stages takes about 60 to 90 minutes in total, and no rapid eyeball beats, so it is collectively called the non-rapid eye movement sleep period
Why are most experts and scholars on the Internet suggesting that we perform deep sleep , the reason is that
, but it is worth noting that deep sleep is just a stage of the sleep process. Those classes or theories that can keep you deep sleep are all nonsense, at least the current scientific methods are only It can quickly enter deep sleep but cannot maintain this state forever, because the following stage "make trouble"
N5 REM
In stage 5, brain waves change rapidly, and high frequency similar to brain waves in awake states appear. Low-amplitude brain waves, but there will be serrated waves with distinct characteristics. Sleepers usually have a turnover and are easily awakened, and seem to enter the sleep of Stage 1 again, but in fact they enter a sleep stage called rapid eye movement sleep (REM) . In this stage of
, various metabolic functions in the body have been significantly increased to ensure the synthesis of brain tissue proteins and the replenishment of substances, so that the nervous system develops normally, and accumulate energy for the activities of the next day. Most of the time, dreams also occur during this period. Once a person is forced to wake up during the sleeping process, he will easily feel emotional. This is what we call getting up and getting angry .
In addition to getting up during rapid eye movements, people who are awakened during sleep will have another special thing: if they dream while sleeping, the dream will be very clear when they wake up at this stage and even cannot tell the difference between reality or dreams.
You have When does this feel?
