There is nothing better than waking up after a sound sleep. But, unfortunately, many people these days do not get adequate sleep and end up being affected with severe health issues. Our sleep patterns severely affect our quality of life. Our ability to think, memorize and do physical activities greatly depend on our sleep patterns. Studies have found that people who do not get enough rest are affected with many health issues. But what exactly happens when we sleep? Continue reading to know what happens to your body when you sleep.

Our sleep can be categorized into five stages, and it is distinguished by the way our brain sends out electrical signals.

Stage 1 (N1):

The first stage of our sleep lasts for about 1 to 7 minutes where you slowly drift off to sleep. It is the time when your eyelids feel heavy, and your head drops off. You can be easily awoken when you are at this stage as your brain is still quite active.

Stage 2 (N2):

After phase one, your brain slows down its activities, and you will slowly descend into slight sleep. The second stage is from the 10th minute to the 25th minute. If you have an EEG monitor connected to your body when you are sleeping, you will be able to see that the waves of the electrical signals sent by your brain slows down and the wavelength increases. During the second stage, your eyes stop moving but even at this stage, you can still be easily woken up.

Stage 3 (N3):

During the third stage, your brain would have entered a moderate sleep stage which is then followed by a deeper sleep. The signals on the EEG slow down further, and the third stage starts to form the 20th minute and goes up to the 40th minute. During this phase, it is harder to wake you up. The signals on the EEG slow down further, and your brain produces delta waves during this stage.

Stage 4 (N4):

Stage 4 is the deepest part of the sleep, and during phase 4 it is extremely hard to wake you up. You will be in your deep sleep, and the EEG shows a much slower wave, and it is called as the delta wave; this is the time when your muscles relax, and your breathing becomes relaxed and rhythmic. Due to the rhythmic breathing patterns, you are likely to snore during this stage.

Stage 5 (N5):

During the fifth stage of your sleep, your brain slowly starts to wake up. It is during this stage of your sleep where you get your dreams. During this time your muscles are temporally, and your eyes start to move. The stage five is also called the REM sleep because your eye keeps moving around rapidly.