To establish how much one can survive without sleep, it is rather difficult, because even healthy adults this value may vary. On average, the volunteers who agreed to test the popular in the Middle ages a torture – sleep deprivation, showed the result in 4-5 days.
However, the complexity of the subjects have started after the first sleepless night. People constantly feel the desire to lie down. Over time, the symptoms worsened. Volunteers appeared first auditory and then visual hallucinations. Changed hormonal background, deteriorated memory. Test subjects were irritated by bright colors, their speech became slurred, they constantly felt fatigued.
On the fourth or fifth day of such marathons are beginning to break down the cells of the brain, and at this stage of the study was stopped, because otherwise people may suffer irreparable harm.
The participants usually spend their sleepless hours in the group of friends. In their opinion if the pals did not let them sleep, they'd give up on the second or third day.
The Guinness book of records
In the Guinness book of records recorded the names of the people who managed to set a record for the number of sleepless nights. First it mentioned the American Randy Gardner. He managed to survive without sleep for 11 days, but later his record was surpassed by another American – Robert McDonald's. The body of this man was so hardy that made it possible for him not to sleep for 19 days. However, after that the creators of the book of records has refused to make new sleepless victory, so that people do not put their health at risk.
Health neither Gardner nor MC Donalds were not caused serious harm. After the experiment, after sleeping 14-15 hours, they again began to feel normal.
However, well-known and even incredible stories about the people who can't sleep. For example, such a feature has Thai Ngoc, residing in Vietnam. After he had been ill with fever, he started having insomnia, which lasts for 38 years. Another of his compatriot awake a few less 27 years. One day, Nguyen van Kha, his eyes closed, felt a strong burning and saw the flames. Since then, the Vietnamese literally never slept a wink.
But the Englishman Eustace Burnett was not observed in any distress. One night he just realized that, despite the late hour, sleep he did not want. And since for 56 years, while his household has dreams, he, in his words, solve crosswords.
Advice 2: How long can a person live without sleep
There is a strong belief that people cannot live without air, water, food and sleep. Every year more and more is experiments whether in reality can not exist without these conditions. It is proved that on average, no air can reach about one and a half minutes, without water about 5 days without food - no more than two months. And without sleep, each person can do different times.
Why the need for sleep
The human body is designed in such a way that he needs constant change cycles of wakefulness and sleep. In the dream is almost a third of your life. Sleep is necessary to restore vitality and energy consumed. Insomnia is painful for any living organism. In ancient China, there was a penalty of insomnia. The body of the man was driven to complete exhaustion, not letting him rest.
Sleep is a key indicator of mental health. Man, having the ability to sleep 7-8 hours a day, is a full member of society. People nedosypayuschie or sleeping more hours, as a rule, feel sluggish and unfocused. Just imagine, one sleepless night reduces efficiency by 30% two in a row already at 60%. Five sleepless nights can significantly undermine mental health.
Scientific experiments or "sleeping volunteers"
In 1965 the school student Randy Gardner set a record, no sleep for 11 days. The first day the teenager felt quite natural. After a couple of days he started having headaches. Also began to show the first signs of Alzheimer's disease, that is memory loss. Towards the end of the experiment, the student started the hand tremor and strong hallucinations. He could not concentrate and perform even the simplest tasks. The experiment was terminated.
Later, according to unconfirmed sources, a certain man had a deadline with no sleep in 28 days.
The world record for time without sleep, no one belongs to Robert McDonald, who was able to do without rest and without special stimulants for 18 days and 21 hours. However, scientists determined that this case is rather an exception to the General rule, since the average period without sleep and special harm to health is only 3-5 days.
Life without sleep
Of course, it is impossible. In a few days starts the irreversible change of the General hormonal background. After 5-7 days the cells of the brain, not withstanding the loads start to break, which can lead to irreversible consequences.
Scientists say that when strong overloads the body is capable of so-called "surface sleep", that is, people like not sleeping and doing his job, but the part of the brain thus giving yourself an opportunity to rest.
Of course, experiments with insomnia are extremely dangerous, and you should not tempt your body with samples to set a record. For a full life and good health be sure to give yourself rest and normal sleep.