Why do humans get sleepy?

Not only humans but all animals with brains do sleep.

  It's like an appetite, it's just as instinctive as it can't be without listening. 

It's a desire.

  It's not that the same state is going on, but it's that two different types of conditions take turns. 

Appears as a set.

  One is called REM sleep, the other is called Nonlem sleep. 

There is.

  Rem stands for Rapid Eye Movement, where the eyeball during sleep is called... 

As a result of noting that there are times when things go fast and when they don't. 

It's what I found out.

  Rem sleep is not your body, your brain is awake, and non-rem sleep is your body. 

The brain is all asleep.

  This repetition is usually said to be done 5__6 times a night.

  The amount of time required for sleep is so large that you can sleep for nearly 10 hours. 

Some people lack sleep, and others say 4_5 hours is enough.

  It's not just a matter of sleeping time, it's a matter of sleeping depth or quality. 

It is because it is related to the problem.

  What we call body fatigue is that you don't sleep and you don't lie down. 

Just by doing so, it is quite effective in recovering from fatigue. 

  So the purpose of sleep must be to restore brain fatigue. 

It will.

  However, they are not aware of the detailed mechanism.

  In the brain, which supports this theory, there is a protein that can relieve fatigue in the brain cells. 

There's a lot of dialogue going on, and that's why the blood flow in the brain is opening its eyes. 

It is also becoming clear that the figure is 20 percent higher than it is.

  There are many theories about why sleep happens. what 

The kind of suppression process that occurs in the cerebrum, and when it goes crazy in the brain, it sleeps. 

Publov's theory, or the brain, is awake because it has a stimulus, or something. 

Strympersona Critman's theory that sleep when the stimulus is eliminated for reasons. 

The back is famous.

  Recently, the U.S. Army has been using a theory that integrates their theories from the movement of brain waves. 

Announced.

  According to it, the brain has a skin-sensory, muscular-sensory, internal-sensory-sensory system called the brain stem. 

There's a connection to the nerves, so the signals from the cataract, their nerves, 

It is being sent as a stimulant to the cerebrum.

  So this river is not always active, it's not always active, it's always active on a cycle. 

To do or stop.

  This stop time is called sleep.

  This theory is in line with some of the most powerful theories of all time, and it's a part of the brain stem that's electrically. 

Considering that there is no contradiction in the experiment, such as sleep if provoked. 

It is regarded as a promising theory.