What's the Deal with Sleep
You go to bed at night, close your eyes, and go to sleep. Actually, when you fall asleep, you go through the four stages of the sleep cycle. Let's explore what happens.
Stage 1. When you feel yourself becoming sleepy. Your muscles begin to relax and your brain activity slows down. Your eye movements are slow. It lasts several minutes and you can be woken up easily.
Stage 2. you won't wake up easily. The slow eye movements continue and your brain waves slow down even more. Your body temperature goes down and your heart rate slows down.
Stage 3 is known as deep sleep. It's more difficult for you to be woken up. So all those sleepwalkers out there may not actually remember doing anything strange in their sleep the next day.
Finally, you move into REM( rapid eye movement). This is caused by certain brain activity. You may have vivid dreams during this stage. Your waves are more active, and they're similar to when you're awake. It's easier to wake you up, but you may feel sleepy.
Once your REM phase is over, the cycle starts all over again. Stage 1 and 2 are considered light sleep, while Stage 3 is deep sleep. You'll go through about four or five of these cycles each night, depending on how long you sleep.
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A. This is when your sleep becomes a bit deeper. B. Have you ever wondered how exactly sleep works? C. A complete sleep cycle lasts between 90 and 110 minutes. D. During the REM stage, your eyes move quickly beneath your closed eyelids. E. Although you are sleeping deeply, this is when sleepwalking or sleep talking occurs. |
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