Secrets about human sleep
Yawning is the first sign that reminds us of lack of sleep.
If there is no sleep for 18 hours, the human response time is reset to 0.
It becomes 0 in 25 seconds.
5 seconds and keep getting longer.
Ordinary people will begin to experience paroxysmal lethargy, which will last anywhere from about 2 to 20 seconds, after which you will find that you need to re-read what you just read.
Your eyelids are getting heavier and by 20 hours, you will start to snore.
According to research, normal people’s response speed at this time is basically equal to zero alcohol content in the blood.
08 people-If you keep driving at this value, you will be attacked in many countries.
You will forget many things, such as checking the spelling of your name twice or setting the brakes when parking on a hillside.
In the animal kingdom, sleep is as important as food, water, and sexual intercourse.
This is true for everyone from fruit flies to modern people.
But scientists cannot predict exactly what sleep is for.
Is it to refresh the body?
Everyone knows that muscles don’t need sleep, they just relax continuously.
Is it to keep the mind clear?
Good sleep will benefit the brain.
But scholars have no unified opinion on how the brain can benefit from sleep.
One theory is that sleep helps the brain keep everything that humans receive when they are awake.
Another view states that sleep is to restore energy.
Some people also suggest that sleep often uses some mysterious forms to help us master various skills.
And what exactly is sleep?
Two things happened in the mid-1990s that brought the focus of research back to the substantive purpose of going back to sleep.
Scientists from the Weizmann Academy of Sciences in Israel proposed in 1994 that scholars’ research should focus on the problem of wrong memory processing, and the technology of peeping at the brain in sleep state was greatly improved at that time.
Scientists at the Weizmann Academy of Sciences have found that the amount of REM sleep people get is directly related to their ability to recognize fixed patterns on computer screens.
This technique is called procedural memory and requires repeated operations and practice.
And remembering facts, such as remembering the name of the US president, is declarative memory—an ability that has nothing to do with REM sleep.
“Our understanding of memory is always naive,” said Robert Stickold, a neurologist at Harvard Medical School.
“Unexpected discovery but one time, scientists suddenly made clear the direction of memory research.
Over the past few years, Stike Gold and his colleague Matthew Walker have studied the effect of sleep on the procedural memory of motor skills at the Beth Medical Center in Boston, USA.
They let trainees who use their right hand use their left hand to type a series of numbers quickly.
They found that no matter what time of day the experiment was conducted, the trainee’s accuracy increased by 60% -70% after 6 minutes.
If the trainees were tested in the morning and retested after 12 hours, their accuracy did not improve much.
But when trainees are trained in the evening and tested after getting up, their speed will increase by 15% -20%, and their accuracy will increase by 30% -40%.
To the surprise of the experts, those who had the greatest improvement spent the most time on non-rapid eye movement sleep.
Other training on vision or perception requires that the trainees have deep sleep or slow wave sleep and rapid eye movement sleep. Sometimes, even closing the eyes for an hour can make a big difference.
At other times, a good night’s sleep is necessary. Hidden tips about the relationship between sleep and other sentient skills continue.
JanBorn and his colleagues at the University of Rubik, Germany, announced a study showing why sleep often gives people better results.
They asked 106 trainees to convert one string of numbers to another using simple but boring mathematical equations.
Trainees didn’t realize that there was a hidden calculation trick that could change their response time.
Good night’s sleep increased participants’ chances of finding this trick from 23% to 59%.
That said, sleep is very important.
The process of sleep At present we have created a unified and accepted theory explaining why we sleep. Scientists focus on what sleep is and deal with situations that interfere with sleep, such as worrying about restless lower limb syndrome (busy legs)Symptoms, including uncontrolled swinging of the calf or entire thigh) and sleep apnea.
They found that the sleep of a small number of mammals (except perhaps dolphins and whales) is clearly divided into two stages, one of which is the rapid eye movement, also known as rapid eye movement sleep (light sleep), and the other is directlyIt is called non-rapid eye movement sleep (deep sleep).
Humans usually complete the transition from rapid eye movement sleep to non-rapid eye movement sleep within 90 minutes.
But according to some observations, we actually spend much more time in REM sleep than this time.
If you observe the state of humans during rapid eye movement sleep through EEG, you will find that the instrument will show a lot of brain behavior. If you wake the sleeper during this time, they will tell you what they just dreamed about.
The composition of dreams during non-rapid eye movement sleep will not exceed one or two simple pictures.
Ignoring the myths about dreams, the work of scientists trying to find the hidden meaning of dreams is not optimistic.
The most common current view of the interpretation of dreams is that dreams are nothing more than repeating a small part of what happened before.
Electroencephalography divides non-rapid eye movement sleep into four parts from shallow to deep.
Parts 3 and 4 are manifested as obvious low-frequency brain waves, which are called slow-wave sleep by experts.
In the first three hours of the night, humans spend much more time in slow-wave sleep than one hour before getting up.
Children are most likely to enter slow-wave sleep, so they always sleep very well when they are carried from the car to the bed.
In addition, adults have very little slow-wave sleep, perhaps because they always get up a lot in the middle of the night.
Instruments with good slow-wave sleep can help researchers better understand what slow-wave sleep brings us.
In an article published in the journal Nature, Tononi, a neuropathologist and psychiatrist at Wisconsin State University, said that those parts of the brain that need to be busy learning new skills when awake need longer slow-wave sleep, so thatPerform better.
There are 11 volunteers in Tononi’s laboratory, and he asked them to use their mouse to click on the target on the computer screen.
But the volunteers didn’t know that the researchers made the operation of the mouse cursor more difficult. They needed to modify the mouse to successfully click the target.
Volunteers were included in the budget and each had adequate sleep between practice and testing, while the other group did not sleep.
One brain wave that slept was much stronger than the other group, and they performed much better the next day.
What exactly does this mean?
Tononi estimates that slow-wave sleep actually contracts all the nerves.
It sounds counterintuitive, but it’s really just self-preservation.
“Overall, the brain consumes 20% of the entire body’s energy.
Most energy is used to connect neurons, and the more you learn, the more neural bonds you have.
“So in the end, if your neural keys are very powerful, it proves that you will consume more energy to run your brain.
“Tononi said:” Maybe another 20%.
“However, after a few days, some new nerve bonds in the brain require more energy than the body may be able to give.
As a result, some of these nerve wire connections will weaken-this is speculated to occur during slow-wave sleep.
This explanation is still a hypothesis, but Tononi believes he already has the evidence.
“In slow-wave behavior, all nerve cells are active for half a second and then silent for half a second.
“Maybe sleep is just repetitive and strengthening the connections between nerve cells to make sure we don’t forget what we have learned while learning new things.
Of course, I can’t explain why this happened without our perception.
Maybe it’s just because it’s easier to operate while sleeping. How to get better sleep?
1. Get up on time every day and do not sleep late on weekends 2. Create an environment conducive to sleep — the bedroom should be cool, the light is dim and clean 3. Do not drink caffeinated drinks or food every afternoon.
Avoid spicy food.
No meals or excessive snacks 3 hours before bedtime4. Drinking a cup of hot milk before bedtime can help sleep5. No computer, no watching TV, listening to light music or yoga for sleep for half an hour before bed6, 20 after bedIf you haven’t fallen asleep for a few minutes, get up and go to another room to do some soft and quiet activities, similar to continue reading or listening to music.