Why do people need to sleep?



There is nothing better than a restful night. But have you ever wondered why this is true?
It's hard to understand how important sleep is for you to stay healthy and feel the best until you do not sleep enough. But when you add the number of hours you spend, it's about a third of your life – that's why it's good for something.

No animal, including humans, can survive without sleep. Already in 1894, the Russian physician and scientist Marie de Manacéine found that when she kept the puppies in constant activity without sleeping, they died after a few days. As for us, scientists and scientists have deprived either themselves or their study participants of sleep for extended periods of time and have achieved similar results: Reduction of mental function, lack of awareness and attention to the world around them, distorted sensation time and tremendous fatigue.

The most notable is the case of Randy Gardner. Still alive today, Gardner is the holder of the world record for the longest time that man was deliberately deprived of sleep. In 1965, then a 16 year old university, Gardner stayed awake for 11 days and 24 minutes. At the end of the stunt, his speech was unclear, his thought was fragmented and he was unable to simply perform mathematics for more than a few minutes.

Some scientists have since deprived eager human participants several hours of sleep for several days. Then they examined how well their noggins worked, giving them various cognitive examinations. They found that participants were getting worse with every extra time spent sleeping and better when they had rest throughout the night.

Many scientists have discussed the question why sleep gives our brain such an impetus. In the end, it would be ideal if we did not need to sleep at all: the closed eye makes the animals vulnerable to hunting. They think sleep is important for two main reasons: It helps us repair and restore our organ systems, including our muscles, our immune system and various other hormones. And it plays a key role in memory, helping us to keep what we learned at work or at school for later use.

Proper hypnosis, scientists have found, seems to help our immune system work better. While our body is at rest, the immune system cells known as T-cells, pass that time that struggles around our body. Other immune cells also function better with more sleep. The researchers studied how our bodies respond to vaccines that target the immune system – after a restful night and after no sleep. They found that proper sleep at night after a vaccine creates a stronger immune response to the virus a given vaccine is intended to attack.

Other scientists have also looked at how sleep affects learning and memory. Everyday, at work or at school, we learn new things. But the ability to recall and use this information later seems to be based on sleep. In one study, the researchers gave the two teenagers the same information and told them they would be tested on it. A team learned this information at 9am and took the test 12 hours later, at 9 pm the same night. The other group learned that information at 9 pm was completely resting and took the test at 9 am. Even without additional study time, students sleeping among themselves did 20 percent better in tests that measured their knowledge of the material.

There is still much we do not know about the possible benefits of sleep, but one thing is certain: we can not survive without it. And the closer we are to get the optimum amount of sleep (that is, eight hours for adults and more for children and adolescents), the healthier we can be.