Types of Sleep - activity. Typically, it is said that the...

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Types of Sleep (although we use many measures in combination to determine when a person is in which stage of sleep, here we are going to discuss only the EEG, since this is the most prominent feature of sleep. When we use percentages of wave occurrences, we mean that those percentages of brain waves were present in a specific time period of brain wave activity - typically a 50 second period. For example, if we say that the stage is made up of 50% Alpha waves, it means that in a 50 second period, 50% of all the brain waves measurable in that period are Alpha waves): Take a look at an image of EEG recording 1) Non-REM Sleep (NREM) -- There are two main categories of sleep, Non-Rapid Eye Movement or Non-REM (NREM) and Rapid Eye Movement (REM). NREM sleep contains all stages of sleep except REM (there are 5, although this is debatable). a) Stage 0 - also known as wake. In this stage your brain wave activity is composed mainly of alpha and beta wave
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Unformatted text preview: activity. Typically, it is said that the more beta waves, the more active and "awake" your brain. However, do not take this to mean that when you sleep your brain is inactive. In fact, your brain is very active in certain stages of sleep, it is just not in a "waking" state. Do you see the difference? b) Stage 1- this is the transition stage from wake to sleep. It is that stage in which you are aware that you are about to fall asleep, but haven't just yet. Approximately 5% of sleep is stage 1, and is characterized by increased amounts of Theta waves and a reduction in Alpha and Beta waves. This is my favorite type of sleep, since I feel extremely relaxed and comfortable as I am dozing off the sleep. Many people indicate that they are most aware of this when falling asleep, for example, on the couch watching TV. This may be the result of trying to stay awake. ..the resistance to sleep may prolong stage 1 and make you more aware of it....
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This note was uploaded on 11/14/2011 for the course PSY PSY2012 taught by Professor Scheff during the Fall '09 term at Broward College.

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