We spend roughly one third of our lives sleeping. There are two types of sleep with different occurrences, REM & NREM. What do these two abbreviations stand for and what are the distinction between the two? Each night when we go to sleep, there are four stages that our body passes through approximately five times during the course of the night. Describe these four stages and briefly describe what happens during each one. In accordance with your age(30), tell how much you sleep each night and the quality of the sleep.

Sleep deprivation affects each individual in different ways and the affects are not all the same. From experience, what happens to your mind and body when you do not receive enough sleep for a long period of time? How long were you awake before you felt like you needed sleep? Have you ever had any experience with sleep disorders, either with yourself or with others? Briefly tell about this experience and how it relates to the text.