As one of the routines in our daily life, sleep has become a regular thing we do. At night, the sleep hormone melatonin produced a marker that the body needs rest to sleep. You go to bed, lay down and fell asleep without knowing you have. The next day, when awake you may not remember exactly how long you have been asleep. You probably still remember the beautiful dream last night. Have you ever wondered what really happens when we sleep?

Quiet sleep or non-REM

During the sleep cycle we will have two kinds of sleep state is a state of quiet sleep and active sleep state. Quiet sleep commonly known as NREM sleep or non-REM (Rapid Eye Movement or No No Fast Eye Movement).

When quiet sleep or NREM or Non-REM sleep, a person’s body will experience a quiet activity. Pulse, respiration and blood pressure of the body will move more quietly and orderly. This is a process in which the body restores the body. Muscles, glands of the body and improved body composition. Substances that are not useful are discarded from the body. At the time of quiet sleep also occur incorporation of proteins that will be used during active sleep.

In the state of quiet sleep or NREM or Non-REM sleep, a person will experience 4 phases. Here are the stages that occur when you start falling asleep.

Light Sleep
The first time someone starts to fall asleep, you enter the first stage where you have mild sleep or shallow sleep, in which the muscles will relax your body and brain waves will move irregularly. At this stage usually begins when you are sleepy and fell asleep. The first phase lasts for 30 seconds to 7 minutes of your sleep.
Actually sleeping
Next, you will enter the second stage is the actual bed, in which the enlarged brain waves, fragments of thoughts and images may appear and move in our minds but we are not aware, you are not even aware of the circumstances around you. The second phase lasts for 20 percent of the entire time you sleep.

Asleep Sleep Over
The third phase of your sleep more soundly. At this stage, your body is getting hard to be awakened because it was asleep.
Sleep most soundly
The fourth stage is the stage of sleep most soundly. At this stage, the brain produces large waves, most of the blood flow to the muscles, there was a recovery and improvement of body functions. Growth hormone is produced and a process of growth takes place at this stage. The third and fourth phase lasted for 50 percent of the time we sleep.

If when asleep, we can not enter the third and fourth stages, it is most likely when we’ll wake up feeling tired even depression.
Finished entering the fourth stage, you will experience the first stage again, entering the second phase and beyond. This cycle will be repeated several times. In general, repetition of this cycle lasts for 3 to 5 times. The duration of a time cycle takes about 90 to 110 minutes.

Active or REM sleep
Any quiet or NREM sleep cycle will end with active sleep or REM (Rapid Eye Movement or Rapid Eye Movement). The opposite of quiet sleep, pulse, respiration, blood pressure and other events take place with the more active, rapid and irregular. Blood flow to the brain and brain waves. You can see when someone is experiencing a period of time saw the bulge of the eye to move left and right because it is in REM sleep, the eyes move quickly from left to right.

At the time of active or REM sleep that a person had a dream that most will not remember when waking from sleep. You also have the immobility that can not move your muscles. This is useful so that you do not move according to your dreams so that you harm. Usually someone is having a dream about once every 90 minutes in a sleep cycle.

Active sleep period lasted for 25 percent of our total sleep period. At the time of active or REM sleep, the body restore certain functions of the brain and improves mental. At this time the mind will pick, process, organize, remove things that are not essential and save information such as experienced on the previous day when someone recording a movie and will prepare the brain and the mind to accept new information the next day. Active during sleep, the brain will erase short term memory or data is not important and maintaining long-term memory. This is what makes after sleeping, the mind feels fresh because more memory available for use again of the brain.

In addition, as long as you fall asleep, the body produces T cells that will fight pathogens or germs. And when asleep, the body also produces the hormone leptin to regulate appetite.

For your body to feel the benefits of good sleep, a person must have all the sleep process and within a reasonable time. If we are sleep deprived, it will be difficult to concentrate, memory loss, and vocabulary, decreased ability to think analytically, and loss of creativity. Even lack of sleep can increase anxiety and depression. Thus, work that you get enough sleep every day and feel the benefits.