Why does a person need sleep? Add your price to the base Comment. Human sleep: why and why do we sleep? What is sleep why is it necessary

Let's make a reservation right away that modern science still poorly understands why living beings - from fruit flies to their beloved wife - completely voluntarily fall into a state somewhat similar to death for some time.

There are some guesses, which will be discussed later, and there are some well-established facts.

Chief among them: sleep deprivation necessarily leads to painful death.

What happens if you don't sleep

IN modern world sleep deprivation found to be torture, and is prohibited by international conventions. So if your neighbors have a noisy party behind the wall in the middle of the night, you can safely complain not only to the police, but also to the UN. However, the police are more effective.

In humans, experiments with scientific control, of course, were not carried out, but experiments on animals have shown: poor victims of science, deprived of sleep, die. Always, regardless of the species - it is a dog or a cockroach. In this case, all tissues and organs at autopsy look absolutely healthy.

Experiments on humans were carried out only with the aim of establishing how a person would feel if he was deprived of sleep for four to five days, and led to predictable outcome: very bad. On the fifth day, coordination of movements becomes difficult, there is almost no attention, weight loss begins, although the subjects were fed well. And even hallucinations begin. For some reason, the volunteers refused to bring the experiment to its logical conclusion.

How we sleep

When humanity came up with electroencephalography, something about sleep became clear. For the interval from " good night"Before" good morning "a lot of interesting things took place.

It turned out that during the night we sleep very differently. Scientists have identified two types of sleep. One is called slow sleep (also - slow-wave, or orthodox sleep). We spend about 75 percent of our time in it.

The second type is much more interesting. "Fast", or rEM sleep, aka REM sleep, or REM sleep. Both of the latter names are an abbreviation for the expression "rapid eye movements". On the one hand, during this phase, almost all muscles are completely relaxed. Except for a few small ones, including the muscles that control movement eyeballs.

As a result, the person's eyes move, the body is completely immobilized, but extremely high brain activity... Not surprisingly, this phase has been called paradoxical. It is during this phase that we dream. And it is the deprivation of this phase that deprives a person of life.

How much do we need?

It is considered that for normal functioning we need at least 6-8 hours of sleep a day. And normally 8-10 is better. Children need more sleep (the duration of sleep depends on age).

Poluektov Mikhail Guryevich, doctor-somnologist, candidate of medical sciences, associate professor of the First Moscow Medical University named after I.M. Sechenov

Until now, sleep seems to be a mysterious state, the nature of which physiologists, chemists, psychologists and other pundits argue about. According to physiologists, who gained popularity back in the 19th century, sleep arises from the fact that in the evening, "the blood drains from the head" - the brain cells do not have enough nutrition and they switch to inhibition mode. This theory, which was actively advocated by the French physiologist Mosso, was proved by experience on a bed-scales. When a person, placed horizontally on this bed, fell asleep, the head end of the bed was raised. But as it turned out upon further observation, after a while of sleep, the blood, on the contrary, rushes to the head and the foot of the bed rises.

In 1937, Alfred Loomis and colleagues proposed the first classification of human sleep stages based on changes in the electroencephalogram. but further development neurophysiology has shown that for a more accurate determination of the stages of sleep, registration is required more indicators than just the electrical potentials of the brain. In 1953, American scientists Nathaniel Kleitman and Eugene Azerinsky discovered the last, fifth stage of sleep, called REM sleep. The establishment of clear criteria for sleep and wakefulness made it possible to determine how the physiological systems of the body - cardiovascular, nervous, respiratory, genitourinary and others - function at different periods of sleep. This made it possible to answer many questions regarding the appointment of sleep for human body.

People could not come to an understanding of the nature of sleep for a very long time, since there were no methods of objective registration of the state of the body during sleep. This became possible only in the 20th century, when the German psychiatrist Hans Berger introduced the method of electroencephalography (EEG) into clinical practice. When using this research method, electric currents were recorded from different areas of the skull, representing the potential difference between the two electrodes. It turned out that at different periods of time of registration, especially if we compare sleep and wakefulness, the picture of the electroencephalogram in the same person can differ significantly.

Psychological theories of sleep, especially Sigmund Freud's, refused to answer questions about what substance or action causes sleep. They believed that the need for sleep was programmed from the beginning, since a person from time to time must plunge into a state of freedom from outside worldas it was in the womb of the mother. At the same time, according to the psychologist, a person gets the opportunity to digest a large amount of heterogeneous information received during the day and restore mental balance.

The next popular theory of the onset of sleep was the theory of hypnotic toxin - "sleep poison". French psychologists Legendre and Pieron suggested that an increase in the tendency to fall asleep in the evening may be associated with the accumulation in the human body during wakefulness of a certain substance - hypnotoxin. When a person falls asleep, this "sleepy poison" begins to neutralize and by the time of morning awakening disappears from the body almost completely. Scientists conducted experiments on dogs that were not allowed to sleep - when they died, they really found changes in their brains, similar to a defeat in case of poisoning. Moreover, if a sleeping dog was given a blood transfusion from a sleepy one, the first dog began to show signs of sleepy behavior and fell asleep. Nevertheless, despite titanic attempts to isolate the "sleep substance", no one has yet succeeded in doing this.

What is sleep?

So, what is human sleep? How does the transition from wakefulness to sleep usually occur? Usually in the evening a person begins to feel tired, notes a decrease in energy, mental activity deteriorates, emotions are dulled. This becomes a signal that it is time to go to the bedroom. The man lies down on the bed, turns off the light and relaxes. After a while, his awareness of his surroundings begins to "fade", dream-like sensations appear, after which voluntary consciousness "turns off" until awakening in the morning or at night.

If you observe this person with the help of a special device - a polysomnograph, then the researcher can see how, during the transition from wakefulness to sleep, the electrical picture of the brain changes - fast and organized electrical potentials are replaced by scattered slower electrical activity. At this time, slow, floating eye movements can also be observed. This is the first stage of sleep. It takes a short period of time - usually 5-10 minutes per night.

The first phase is replaced by the second stage of sleep. It is quite easy to determine from the picture of the electroencephalogram, since at this time specific phenomena can be observed: complexes with several peaks and troughs and very specific periods of rapid electrical activity - the spindle of sleep. The second stage usually takes the most most sleep time - about 50%.

With a further deepening of sleep, the second stage passes into the 3rd and 4th stages - the so-called delta sleep. In this period of sleep, a large number of slow high-amplitude electrical potentials are determined on the electroencephalogram. Delta sleep usually takes about 20% of sleep time and completes the so-called "slow sleep" - a part of sleep, which is characterized by slow electrical activity, unusual for the state of wakefulness.

This is usually followed by REM sleep, which generally occupies 20-25% of all sleep. It is impossible to determine REM sleep using only one electroencephalogram. This is due to the fact that the bioelectric pattern of REM sleep is very similar to the pattern of wakefulness. However, if you observe a person in a state of REM sleep, it becomes clear that he is sleeping - his eyes are closed, the sleeping person does not react in any way to sounds or touches. At the same time, episodic twitching of the arms or legs and sharp, rapid movements of the eyeballs under the naked eyelids can be noted. By the name of this phenomenon, this part of sleep is called REM sleep. If you wake up a person at this time, then most often (about 80% of cases) he will tell that he had a dream - more precisely, a dream. From active action during a dream (when in a dream a person can run, fight, scream, etc.), the body is protected by turning off the tone of the striated muscles during this period.

The stages of sleep alternate in a certain order, forming the so-called sleep cycle - first, four stages of slow wave sleep go through, completing the REM sleep cycle. During a night's sleep, 4-6 sleep cycles are usually repeated. The duration of such a cycle in an adult is 90 minutes, in children - about 60 minutes. The absolutely strict regularity of the alternation of the stages of sleep is not maintained. Periodically, during sleep, a person may wake up (for a while, go into a more superficial stage of sleep) due to a sharp sound or feeling uncomfortable or even wake up and go to the toilet, but still after a while the sleep cycle ends and is replaced by a new one.

Another important pattern of sleep is the different ratio of slow-to-REM sleep in the cycle, which changes over the course of the night. Professor Theodor Steckmann promoted the thesis that "one hour of sleep before midnight is equal to two hours after." Indeed, in the first hours after falling asleep, it is usually more difficult to wake up a person than in the morning. This is due to the fact that slow sleep prevails in the first half of sleep, and fast sleep in the second half. That is why we often remember dreams if we wake up in the morning, and not in the middle of the night. At the same time, the overall restorative effect is higher in slow-wave sleep, therefore, having slept for several hours at the beginning of the night, we can feel almost recovered from wakefulness during the day.

Why sleep?

The purpose of slow and REM sleep has been clarified on the basis of numerous experiments based on mental and physical stress or deprivation of one or another part of sleep. It has been shown that exercise stress, especially carried out in the evening, leads to an increase in the amount of slow wave sleep, mainly in its deepest stages (3rd and 4th). The use of mental stress leads to an increase in the number of deep stages of slow wave sleep and acceleration of the onset of REM sleep. Biochemical studies have shown that 80% of the daily amount of growth hormone (somatotropic hormone) is released during deep slow wave sleep. And in some sleep disorders, when the amount of deep slow wave sleep decreases, for example, with obstructive sleep apnea syndrome, children experience growth retardation and weight gain. Thus, it is believed that to the greatest extent, slow-wave sleep, especially its deepest stages, are responsible for the physical recovery of the human body.

The role of REM sleep was determined in witty experiments with deprivation of this part of sleep, carried out on rats. The animal was placed on a platform floating in the water, on which it could only be actively balancing. When falling asleep and transitioning to REM sleep, muscle tone decreased - while the animal lost its ability to stay on the platform, fell into the water and immediately woke up. Thus, it was possible to significantly limit the amount of REM sleep received by the rat. Further experiments were carried out to teach animals to make their way in the maze to the feeding trough. It turned out that if a rat trained in this way was then deprived of REM sleep, it would forget the path to the coveted bait. This experience was one of the clearest confirmations of the important role of REM sleep for memorizing previous events in mammals.

Experiments with REM sleep deprivation and NREM sleep deprivation have yielded ambiguous results in humans, which is associated with the complexity of the highest nervous activity and the formation of motivations. Most often, against the background of REM sleep deprivation, the subjects became emotionally unstable, sometimes aggressive. Some had hallucinations. Summarizing the results of these experiments, it can be argued that REM sleep is necessary for the processes of remembering and maintaining a person's mental health. Dreams, which are a companion of this part of sleep, reflect deep mental activity and, in symbolic form, can represent to our consciousness information about existing intrapsychic conflict situations.

Why does a person fall asleep?

Where does the state of sleep objectively come from? Why in the middle of the day an ordinary person does not feel any craving for sleep at all, but at night, even at a responsible post, is ready to give everything for the sweet moments of sleep?

The human body functions in two modes. One is the well-studied state of wakefulness. The other, respectively, is the state of sleep. In the state of sleep and wakefulness, almost all life processes occur in different ways. This is very clearly illustrated by the example of changes in the electroencephalogram: the electrical processes in the human brain differ significantly not only when comparing sleep and wakefulness, but even between different stages of sleep. The activity of other systems of the body can also be strikingly different. For example, breathing during sleep becomes 2-2.5 times less deep than in the waking state, the heart rate during sleep slows down, the secretion of stress hormones - cortisol, adrenaline - decreases and hormones specific to sleep - melatonin, are produced. growth hormone... Many other examples can be cited.

The main factor in the initiation of sleep is a change in the interaction of two systems of neurons in the brain - activating and inhibiting. The activating system, which consists of 8 centers, stimulates the cortical and subcortical parts of the brain. This is necessary in order to maintain a sufficient level of consciousness, quickly respond to changing circumstances, and ensure a well-coordinated response. internal organs on these changes, receive and use information. If the activating system is damaged, for example in a stroke, the person sinks into a coma. The main "carriers" of information from activating centers to other parts of the brain are acetylcholine, norepinephrine, glutamate, histamine and a number of other substances.

There are significantly fewer centers related to the brain's syncronizing system, or "sleep centers". Two of them are the main ones - they are located in the forebrain and hypothalamus and contain the universal inhibitory substance gamma-aminobutyric acid and the peptide galanin, which is important for sleep. A person begins to experience drowsiness when the sleep centers begin to work intensively and suppress the activity of the activating brain centers. Later, a self-sustaining mechanism is triggered when the brain begins to disconnect itself from external stimuli, while at the same time forcing cortical neurons to generate electrical activity inherent in the state of sleep. After the brain has worked in REM sleep for a sufficient amount of time, the complex interaction of the neuronal nuclei of the brain stem triggers REM sleep. The end of REM sleep completes the first sleep cycle, after which the entire sequence of sleep stages repeats.

Researchers suggest that big role Two additional factors play a role in the initiation of sleep (slow wave sleep): the accumulation of the mediator adenosine (mediator of fatigue) during the day and the intensification of impulses from the internal clock of the body (suprachiasmatic nuclei) in the evening. In addition, the likelihood of sleep is influenced by the accumulation of the "sleep hormone" melatonin, the production of which begins to increase with a decrease in the light flux from the outside (when it starts to darken).

In order to explain why a person falls asleep every day, for example, at 0 o'clock, and not at 11 or 15 o'clock, a model of "two processes" is proposed. According to her, as you wake up, a certain substance or a complex of substances - hypnotic toxin - accumulates in the body (recall the experiments of French researchers on sleepy dogs). More than a dozen substances claim the title of hypnotic toxin, but none of them has yet shown an unambiguous hypnotic effect in an experiment on humans. Simultaneously with the increase in the content of this hypnotic hypnotic toxin in the body by the evening, the level of brain activation, which depends on the activity of the internal clock, decreases. Thus, the "gate of sleep" opens, you just need to enter them. If a person eliminates external stimuli, assumes a relaxed horizontal position in bed, then, most likely, sleep will start - sleep centers will begin to suppress the activating centers and fall asleep. During the night, when sleep continues, the hypnotic toxin is gradually neutralized, and brain activity in accordance with the signals from the internal clock will begin to increase. In this case, the moment will come when the "gate of sleep" will close - awakening will be possible even from an insignificant internal or external stimulus and the dream will end.

How much sleep do you need?

Can a person not sleep at all? It is often mentioned that torture with sleep deprivation was the most terrible of those that were applied to a person, forcing him to lose his "human appearance" in a few weeks and tell everything to his tormentors. The Guinness Book of World Records in 1965 recorded the first (and only confirmed) record of being awake for 264 hours (11 days), owned by American student Randy Gardner. After 4-5 days of lack of sleep, the subject began to feel weakness, irritability, suspicion, he periodically had hallucinations. After the end of the experiments, Randy slept for 14 hours 40 minutes, the doctors recognized him as completely healthy. In the future, representatives of the Guinness Agency refused to register such records, since they are associated with danger to life and health. Nevertheless, in 1977 in the UK, Maureen Weston, participating in a rocking chair marathon, managed to stay awake for 449 hours (18.7 days).

Sleep scientists are skeptical about the reliability of such records. To prove that the person has absolutely not slept all this time, it is necessary to continuously record the indicators of the polysomnogram. In experiments on volunteers, it was shown that even after 2-3 nights without sleep, periods of "microsleep" lasting 10-30 seconds begin to invade the usual EEG of wakefulness and a pure experiment does not work, because in total several hours of sleep are still gained per day. Most likely, sleep is such a vital motivation of the body that it is simply impossible to completely exclude its appearance for a long time.

How much sleep does a person need to get enough sleep and feel good? It is currently believed that the need for sleep is genetically laid down and after a person reaches adulthood, it practically does not change. It is incorrect to say that older people need less sleep than younger people, they just have more reasons to sleep poorly. There is historical evidence of people who slept very little and at the same time actively worked and even had a significant impact on the course of history. So they say that Leonardo da Vinci slept 1.5 hours a day, Nikola Tesla - 2 hours, Napoleon Bonaparte - 4 hours, Winston Churchill and Thomas Edison - 4-6 hours. It is not possible to verify these statements. Scientists have conducted several studies of low-sleep people who slept for 3-5 hours. A feature of their sleep was that the deepest sleep - delta sleep - took them at least half the time of the entire sleep, that is, their sleep efficiency was maximized by limiting the time of less important stages of sleep.

It is believed that for most people, the “healthy norm” is 7.5 to 8.5 hours of sleep. To determine a personal, individual need for sleep, during the "experiments" it is necessary to provide yourself with the maximum favorable conditions and exclude external factorsthat can distort the picture - work, stress, unfavorable natural and social background. Determine the approximate duration of your own sleep should be 2-3 weeks of vacation, "no frills", after the chronic lack of sleep, which is characteristic of many actively working people, will be compensated.

A characteristic feature of modern society is the deliberate restriction of sleep in favor of increasing work time or, conversely, resting time in the evening and at night. This effect is also called the "Edison effect", paying tribute to the famous American inventor who improved the electric incandescent lamp in order to produce it in mass quantities and, figuratively speaking, "turn night into day." It is not yet possible to determine exactly how long a person can exist in conditions of restricted sleep without consequences for himself. Nevertheless, a number of evidences have already been obtained about the negative impact of prolonged sleep time limitation on health.

Answers:

Irina

Svetik, good afternoon! This is the mystery of all times and peoples, the world of mirages, the illusory world of our dreams. But I remembered an interesting observation, why they say so ... the morning of the evening is wiser ... Maybe the answer to this proverb is precisely in the fact that at night we restore our mental strength and in the morning we get up vigorous and rested, and yesterday's problems ... After all, they don't run away anywhere, but a fresh, rested look, as if a new dawn gives the feeling that everything is playing with new colors, some resources in the body are revived, unlike in the evening, when fatigue is already taking its toll, in the morning you can see a solution to the problem in a new way. In general, sleep is a great gift that has been given to us and sleep cannot be replaced and replenished with anything, it is like an indicator of our psychological state and of course physical health. How long can a person stay awake? Maybe ... experiments were carried out, it may not sleep for a long time, only from chronic lack of sleep, nothing good will come of it, the body will still suffer, and very much, especially the brain, weakness will appear ... and so on. No, Mother Nature is wise and gave us sleep, as salvation and as an extension of life and nothing else. But sleep is again a relative concept, the body in a dream still continues endless processes, and most importantly, the process of cell restoration, in general, a wise natural principle brings order in its restless body. And the very fact of our dreams is interesting, the brain is working, something is laying on the shelves, it's not for nothing that we see dreams and even insights can come in a dream, Mendeleev immediately recalled. In a dream, the body lives its own life, giving a person peace and rest, filling him with new strength, and the soul ... the soul is also asleep, or it is at the moment of sleep that the soul gains that very freedom, and if the soul is a small particle of the universe and God, It may be that the body, tired of daytime worries, releases the soul into outer space during its sleep, so that it can free itself from negative energy. So it turns out ... the morning of the evening is wiser ... Yes, Svetik You are right, everything in our world is natural and conceived by the Creator as it is necessary for life. For the life of the human body, and perhaps precisely for the eternal life of our souls ...

zad zadov

well, it seems they say in order to restore strength))) and maybe even in order to relax the soul every day resort)))

Explosion

during sleep, a person rests, both physically and mentally.

Irina

To rest!!
Soul and body

Personal Account Removed

During sleep physical body rests, and the soul uses more abilities than during the waking of the body, it remembers the past, and sometimes foresees the future, it acquires more power. Sleep partly frees the soul from the body. A person, falling asleep, comes for a while in a state similar to that in which he will constantly be after death.

Xeiko Bond

Sleep is not just rest. This is one of the ways the brain and internal organs function useful.
However, in detail about what enzymes are produced at night and how the information received during the day is processed to fit into the long-term memory of the experience ... - I can't tell you here. :)

Arti

What about those people who do not sleep at all in their lives?
1/3 :) our way of life dictates it is not nature ... According to neurology, humans have Alpha, Beta, Tau rhythms. All three regulate and influence our lives and all three are there every second. When a person has an active Tau rhythm, people usually sleep, which is not necessary. It's just so convenient. And he is active day and night, for hours and just a minute.

nat chamois

and here's another great question. thank
I am an owl, but at the same time a terrible sleepyhead. I can drink the strongest freshly brewed coffee and fall asleep in 10 minutes. probably my nature protects me ...
but here's what's strange. I have no, there is no insomnia. perhaps it’s just my attitude to sleep and reality is such that I don’t worry if I don’t fall asleep on time, I don’t count elephants ... it happens that I don’t sleep at midnight or until dawn, and yet I don’t feel broken and I don’t groan - that's , have not had enough sleep. and it happens that I will nap during the day. in these minutes-hours of sleep, it seems to me that my brain does not turn off, because in a dream sometimes SUCH IDEAS are born, better than in reality!
I remember this story - I wrote a story, I know that he was a genius, I was too lazy to write it down at night, because I thought that this should not be forgotten, and there was no paper and pencil at hand. the next morning - NOTHING. only the feeling that she wrote a brilliant story. I still don’t remember him. there are others, but that one is irretrievably lost.
I saw pictures - it's easier with this, you can try to restore. but I think that all the same they are not the ones who dreamed. the trick is that what appears or appears to be much brighter than reality ...
what is superfluous then? what cannot be told and restored? No, I do not think so. EVERYTHING is equally important.
and a passing question - http://otvet.mail.ru/question/8835023/ - I wanted you to look at it, I extended it, but probably something didn't grow together. if it's not difficult - tell me - what do you think about that soul, which has been hovering for a long time nowhere ... IN WHAT DREAMS?

And I also found such a record. I thought she was in line with our conversation

In the wilds of the forests of Malaysia, the primitive Senua tribe was discovered, whose whole life was subordinated to dreams. The tribe was called the "people of dreams". Every morning at breakfast around the fire, everyone talked only about what they saw in their dreams at night. If one of the senua in a dream committed an injustice to someone, he should have made a gift to the victim.
Senua's dream world was more informative than real life... According to the senua system of concepts, if you see sexual intercourse in a dream, you must definitely reach orgasm, and then in the real world thank your partner with a gift. If you have a nightmare, you need to defeat the enemies, then demand a gift from them in order to turn them into your friends. However, the most desirable subject for sleep was flight. The entire tribe congratulated the one who flew in the dream. The first flight in a child's dream was like the first communion. The child was overwhelmed with gifts, and then they explained how to fly away to distant countries in a dream and bring outlandish hotels from there. Senua conquered Western ethnologists. The tribe did not know violence and mental illness. It was a society without stress and wars.
The Senua worked just enough to provide the minimum necessary for survival. Senua disappeared when the forests in which they lived began to be cut down. But nevertheless, we can try to use their knowledge. In a dream, we are omnipotent. The first test of mastering the science of dreams is flying - stretching out your arms, planning, falling in a corkscrew, gaining altitude. The science of dreams must be learned gradually.
"Summer" watches give confidence and imagination. Babies take five weeks to learn how to manage their dreams. Adults sometimes take months. "

Why does a person need sleep? And why you can even die if you don't sleep for several days

Answers:

Evgeniya Lapina

Because it is the body's natural need to replenish energy ...

Evgeniy

Dying is unlikely

Ksenia Chistyakova

if a person does not sleep for a long time, the body will become severely overworked

Arrow

About dying is complete nonsense!

Vadim Kolosov

restoration of strength.

Laura

Why does a person need exactly a third of the day to sleep and not half

Answers:

Alive

Research into sleep and its health benefits continues, resulting in new discoveries. Yet all the studies confirm over and over again that 7-8 hours of sleep is optimal for a normal person.

According to Professor Francesco Cappuccio, with regular lack of sleep, a person is at risk of disruption. endocrine systemresponsible for the production of hormones. Chronic lack of sleep, in addition, can cause the development diabetes mellitus, as lack of sleep leads to a decrease in sensitivity to isulin and impaired glucose tolerance.

The results of research by scientists from the same University of Warwick lead to the conclusion that people who sleep no more than 6 hours a day are twice as likely to die from myocardial infarction and 15% from a stroke than people who sleep 7 -8 ocloc'k. In addition, those who sleep less than 6 hours a night are 12% more likely to die before age 65.

Scientists explain that many people now do not get enough sleep because they exchange their sleep time for watching TV, "sitting" on the Internet ... In addition, the researchers found that 37% of the people they interviewed in the studies suffered from insomnia, and 24% had other sleep problems.

However, do not think that an increase in the amount of time allotted for sleep above the norm helps to restore and maintain health. Chronic oversleeping is also harmful for a healthy person. Sleeping for more than nine hours also leads to various disorders of the body's functioning: headaches, excess weight, back pain, depression, etc. By the way, oversleeping, like not getting enough sleep, also increases the chances of diabetes.

From the above, we can make an unambiguous conclusion: healthy man should sleep at least 7 and no more than 8 hours a day. A deviation in one direction or another either leads to the development of diseases, or indicates that not everything is safe in the human body.

Vladislav K

No, well, you still have to eat and shit :-)

G

you turn into a sloth, and the sleep current is needed to rest the brain.

Mikhail Levin

so you ask!

If you slept for 12 hours, you asked why half and not a third?

Cat Wrap

There is a way, for the fierce "free" professions (creative individuals), to sleep every hour for 10-15 minutes.
A huge amount of free time is freed up ...

why does a person need to spend so much time sleeping

Answers:

Ramilya Musina

To get enough sleep, the body needs to get enough sleep per night.

On average, we need seven to nine hours for proper sleep and rash. For some, six, and sometimes five hours are enough to get enough sleep.

In order for our body to rest, we must get a certain amount of uninterrupted sleep. If our sleep is interrupted, we will be sleepy throughout the day. And if you compare six hours of sound uninterrupted sleep with eight hours of restless sleep, then six will be more beneficial for the body.

In a dream, there is a restoration of the mental, mental forces of the body.

Evgeniya Burba

so that the body rests and recovers both mentally and physically

Yulia Komissarova

so I also think about it all the time) probably because a person has very large batteries, until aaaaaa will charge there ...

Catherine

natural need of the body

Lena

Optional! You can sleep 2 hours a day and feel good (for some time, and even very long)

hushofusya

i am a robot!! never sleep

Admi

you need to sleep at least 1.5 hours a day, but irreversible changes in the brain and psyche occur, but whether or not it depends on the person for a long time, some people have enough and 2-3 hours for someone and 9 hours are not enough ..

Why are dreams not remembered?

Answers:

Olga Dyakova

Do not move immediately after waking up, but try to remember at least something that you just dreamed about, maybe another piece will stretch ... and another ...
And if you dream constantly, you need to draw some conclusions. Guess what conclusions you have to draw, if you've guessed right, dreams will change.

Michael

There is a phase of deep REM sleep (like so), they alternate. If sleep is in the fast phase, then you remember, in the deep phase, no.

Alexander

Why can't people remember their dreams?

Some people have no difficulty in remembering several dreams in a night, while others remember dreams only sometimes or never at all. Almost everything that happens during sleep - including dreams, thoughts that come throughout the night, and memories of brief awakenings - are forgotten by morning. There is something in the very phenomenon of sleep that makes it difficult to remember what happened, and most dreams are quickly forgotten if they are not recorded immediately. Sometimes dreams are suddenly remembered later on the same or another day, suggesting that the memory of dreams is not completely lost, but for some reason it is very difficult to recover. The sleep and dreaming process is also affected by a wide variety of drugs and drugs, including alcohol. Moreover, abruptly stopping certain medications can lead to nightmares. Helpful to discuss with your doctor possible effect any medication you are taking.

How can you improve your sleepy memory?

Before you fall asleep, remind yourself that you want to remember your dreams.
Keep paper and a pen or tape recorder near your bed.
When you wake up, try to move as little as possible and put aside thoughts about the upcoming day.
Write down all your dreams and images in the most detailed way (!!!), as they can quickly dissolve. Any distraction makes the memories of your dream disappear.
If you cannot remember the dream completely, take notes of the last things that were in your mind before waking up, even if you have only very vague memories.

Violetta Vista

No, this is not at all stupid, try to be not a spectator, but an actor in your dream, change it, do as you want, these are not empty words, we can all pour on our dreams, try ... You will tell me later.

A princess

in the morning without getting up yet .. remember the dream ... and so every day ...
but you are dreaming ...
and in the evening before going to bed .. think about sleep ... and tell yourself .. I'm falling asleep. ... it's just a dream.. .
and you can try to realize yourself in a dream .. to somehow prove yourself there .. change something ... everything is good .. it's just that fears stuck so stupidly inside .. but I think something needs to be changed

Alexey Ovcharenko

The screw in the head is not enough.

TIKOOOOOOO GALSTYAN

Each of us has dreams, this has been proven by physiologists and even several dreams per night. But as a rule, not all dreams are remembered. What does this mean?

According to psychologists, we forget what we do not want to remember. During the whole day, we accumulate many small fears, anxieties and various suspicions, and our subconscious is trying to tell about all our problems. And we? We prefer to hide from all problems.

If your state of mind is in complete balance, then your dreams are appropriate. But if you are experiencing nervous and mental exhaustion, then first of all you need to restore your dreams.

Some people, in their opinion, have never dreamed in their lives. How can such people restore their dreams? Everyone dreams of dreams, but the problem is that you just need to remember them. But how do you do it? But this problem can be solved very easily with the help of a few techniques and an ordinary notebook.

It is best to restore dreams immediately after waking up. Of course, everything will not work out right away the first time, but time after time you will get better and better.

Below we give three of the most simple and effective methodshelping to restore and remember your dreams.

What does a person need sleep for? Sleep is a means of protecting the body from overwork. Just as hunger induces the need for food, so fatigue induces sleep. A person can live without food for up to three weeks. But three weeks without sleep would lead to severe mental and physical disorders. A person has all kinds of hallucinations. For example, he sees how walls and floors begin to "walk", hears the barking of dogs, the noise of cars, human voices, etc. And vice versa, some mental illness accompanied by severe sleep disorders.

For a short time in the highest degree an overworked person is still able to concentrate his attention on some problem, question, operation, etc. However, this tension cannot be effective. The fact is that in such a state a person inevitably makes mistakes in his actions.

However, a sharp decrease in concentration of attention can also occur in conditions of a sufficient amount of sleep, for example, during monotonous activity. By the way, leading experts at the Würzburg Institute for Research and the Fight against Sleep Disorders strongly recommend: “During your working day, try to take a nap. It will help you do your job easier, faster and better. Then and night sleep will become deeper and more effective. " Nap in the institution belongs to the category of refreshing minute sleep.

There are people who can instantly fall asleep at any time and in any situation. Daytime sleep does not harm people with chronic disorders.

In historical and modern literature, the names of famous people are constantly encountered, whose sleep was distinguished by a short duration. These are Napoleon, Alexander Humboldt, Rudolf Virchow, Mirabeau, Schiller and others. From a few minutes to one or two hours of sleep a day was enough for them to regain their strength. They may have resorted to what we currently call autogenous training (auto-training).

The American inventor Thomas A. Edison, to whom mankind owes for the existence of an incandescent light bulb, had to sleep only two hours a day during the year. Edison himself said that for his person, he never used more than 4-5 hours of sleep. However, he compensated for the lack of sleep with frequently repeated short rest pauses. Edison believed that sleep was a legacy of slum dwellers and seriously believed that the electric light from his incandescent light bulb would end this habit.

But among celebrities, there are people who have long sleep times. This is Schopenhauer and Goethe. The latter could sleep for 24 hours straight.

Winston Churchill not only loved to lie in bed until late (sometimes he was in it until noon, while, however, doing the work of the government), but often in the afternoon went to "nap for an hour."

The sleep rate for an adult is 8 hours. However, depending on individual characteristics, age, loads, it fluctuates noticeably. But we can say definitely: a person should sleep at least 5 hours a day.

Long enough rest of the central nervous system - the most important factor in achieving healthy old age. Wanting to stay fit old age, it is necessary to take care of your nervous system throughout your life, to constantly monitor its rest. And only healthy sleep can provide real rest.

A person's daily need for sleep is 8 hours - a third of his life. This physiological process consists in reducing the human response to the environment and restoring the body.

For a long time, people believed that the soul of a person, when he falls asleep, leaves the body, and all the positive or negative moments of her wanderings were postponed and reflected in dreams, being in the so-called astral world. The science of sleep - a somnology that arose in the last century, refutes this fact, although questions about the concept of sleep, physiology, and its functions are still open.

What happens to the body in the absence of adequate sleep?

Through many experiments, during which people from different countries of the world tested their bodies with insomnia, it turned out that without sleep a person's condition worsens in a certain pattern. On the 3-4th day of insomnia, fatigue and irritability appear... On the fifth day, vision falls, hearing worsens, coordination of movement is impaired (moreover, with a balanced and timely nutrition), hallucinations are observed. In the future, motor skills and speech are impaired.

The 8-day insomnia record was recorded in 1965 by Randy Gardner

In the future, experiments began to be carried out on animals. And the results showed that insomnia is ultimately fatal, due to weakened immunity, nervous system disorders and malfunctioning of internal organs.

There are about 89 diseases that are caused bad sleep or lack thereof... Among these, insomnia, snoring, obstructive sleep apnea, and restless legs are common. Why is sleep so necessary?

As a result of work, toxins are formed in the brain cells, which lead to a tired state. During proper sleep, they are excreted by the bloodstream. So, in 2012, researchers at the University of Rochester (led by Maiken Nedergaard from Denmark) discovered the glymphatic system, which, during sleep, begins to remove toxins from the human nervous system.

Also, during sleep, you do not need to analyze the information received from the world around you, since vision, hearing and the body as a whole work in economy mode. At this moment, the processing of information takes place, which goes inside the body, and not received by visual perception of the surrounding world.

It is important for a person to fall asleep in a horizontal position, since in this case the brain and heart are at the same level, which means that blood circulation becomes better.

1. Only 3% of people who sleep 6 hours a day can feel normal. They owe this to their genetic characteristics.
2. The ideal sleep time is between 10 and 15 minutes. This suggests that you are quite tired, but during the day you were vigorous and active.
3. Young parents are often severely sleep deprived. A new family member is depriving his parents of 400-750 hours of sleep a year
4. Out of 6 road accidents, 1 is due to driver fatigue.
5. Our internal clock, with which we can wake up a few minutes before the alarm, works thanks to the hormone adrenocorticotropin... If its level increases sharply, then the person feels unconscious stress associated with the rise.
6. While snoring, a person cannot dream. Moreover, snoring can indicate that a person is in the slow phase of sleep.
7. The most important enemy of good sleep is the Internet, which is available around the clock to almost every inhabitant of the Earth.
8. Regular lack of sleep can lead to weight gain. The fact is that a tired organism tries to make up for the lack of resources in any way. That is why, with a lack of sleep, a person often experiences a feeling of hunger.
9. Scientists claim that dreams are dreamed by all people without exception. Those individuals who say otherwise, most likely, simply do not remember their nightly "adventures".
10. Many famous people slept, to put it mildly, strange. Leonardo da Vinci practiced phased sleep: every 4 hours he rest for 15 minutes. Albert Einstein slept no more than 4 hours a day, and Nikola Tesla - 2 hours a day.

It is important for a person to fall asleep in a horizontal position, since, in this case, the brain and heart are at the same level, which means that blood circulation becomes better..

Sleep is a physiological state of the body that is necessary for every living organism. The body needs to be restored, recharged, in order to continue to learn with renewed vigor the world ... No need to spare time for sleep, deprive the body of such important moments. It must be remembered that human health, his life entirely depends on sleep.

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