Friday, September 30, 2011

The Many Stages of Sleep


Resource:http://www.cbn.com./health/nutrition/Goldfarb_sleepstages.aspx?
Summary: There are different stages of sleep.  But before we get to that, there are two types of sleep necessary to keep our brain and body in optimum condition.  One is called NREM (non rapid eye movement also known as “quiet” sleep) and the other is REM (rapid eye movement or “dream” sleep.)  NREM releases growth hormone or growth repair.  It restores the physical body.  It focuses the blood on muscles not the brain.  It happens in the first 90 minutes of sleep.  And it also stimulates the immune system to defend against infections.  REM restores your brain, clears out the brain, happens after NREM sleep, and captures memories that allows knowledge to take place.  NREM has four stages to sleep before REM.  The first one is light sleep.  It only lasts for about ten minutes.  The second stage is a sleep that last about thirty to forty -five minutes.  The third is that your heart rate and breathing will slow down in a good way.  The last stage takes place of you going into a very deep sleep.  Now, REM gives you ninety minutes into to your sleep.  We need eight to ten hours of sleep to get through these stages three to four times. 

Critique: I don’t think that people understand what our sleep is supposed to look like.  I think the stresses of life keep people from enjoying a solid nights rest.  It is very important for people to get good nights sleep because pushing ourselves to the maximum is ultimately not good for our bodies.  I don’t know what kind of sleep I have, but I would guess that I have NREM because I sleep very sound.

Impact:  I think it is important for people to realize how important our sleep really is.   The impact of someone not getting quality REM sleep is not good.  The person will wake up just as tired as they were the previous day.  In that exhaustion, I do not think they will accomplish what they could’ve had they rested well.

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