The Need for Sleep As fundamental as drinking or eating, sleeping can be described as a certain necessity that all animals need. Although it can not be proven beyond the shadow of a doubt what the evolutionary advantages are, there have been many studies that show what happens if we do not sleep. These slight changes in behavior can be very debilitating. Some 30 to 40 million Americans have sleep disorders in which they do not get there comfortable nights sleep. By not getting enough sleep, a person will most likely not be able to handle the daily toils and tribulations of life. Sleep is a process that takes time to complete. It begins with stage one and goes to a deep sleep known as stage four. These stages are all during the time known as Non-REM sleep, or Non-Rapid Eye Movement sleep. The first stage is a very light sleep wi....

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