What Happens During Sleep
What Happens During Sleep?
What is sleep exactly? According to Wikipedia, Sleep is a periodic state of rest during which consciousness of the world is interrupted. There are two types of sleep. REM (Rapid Eye Movement) sleep and NREM (Non-REM) sleep. REM sleep is when we dream. People usually have 3-5 REM episodes per night. NREM sleep is divided into 4 stages. Stage 1 is known for drowsiness as to when you first fall asleep. Your eyes move slowly under the eyelids, and muscle activities slow down. This stage lasts for about 5-10 minutes and you can easily be awoken. Stage 2 is a light sleep where your eye movements stop, your heart rate slows, and your body temperature decreases. Stage 3 and 4 is where you enter into your deep sleep where it is difficult to be awoken. If you are awakened, you do not adjust immediately and may feel disoriented for several minutes after you wake up. Children during deep sleep may experience bedwetting, night terrors, or sleepwalking.......
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