Thesis: Many of us think that sleep is a passive, constant and unchanging process. Yet, what we don’t realize that sleep is in fact a very active state, and there are different stages during the sleep through which we go through.
Specific Purpose: I will inform the audience about 5 stages of sleep and the time we spend in each stage during our sleep.
Intro:One of the most spread misconception about sleep is that sleep is just a matter of our bodies turning off for couple of hours , and then turning back on when we are awake. Many of us also think that sleep is a passive, constant and unchanging process. Yet, what we don’t realize that sleep is in fact a very active state. Our bodies move frequently during the night, but what’s even more striking is that our brain activity is more varied than it is when we are awake. As we sleep our body goes through what is called a non-Rem and Rem sleep. (REM stands for the Rapid Eye Movement) Typically we begin our sleep cycle with a period of non-REM sleep, what is than followed by a very short period of REM sleep.
Stage 1: -Transition between wake and sleep
-Can be easily awaken
-A feeling of falling
-A feeling of non sleeping
Stage2: -period of light sleep
-body temperature and heart rate decreases
-body prepares for deep sleep
Stage 3 and 4: -deep sleep stages
-difficult to wake someone up
-feeling disoriented for several minutes, if woken up
-body restores itself
REM Sleep: -breathing fast/irregular
-eyes move rapidly
-muscles become immobile
-hear rate and blood pressure increases
-stage of sleep when we dream
Conclusion: The five stages of sleep including their repetition, occur cyclically. The first cycle, which ends after the completion of...