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Sleep and Sleeping Disorders Sleep normal regular state of rest of an organism In contrast to the waking stated sleep is characterized by relative Quiescence of physiological functionsblood pressure breathing heartbeat And a relatively low response to external stimuli What And I thought sleep was something that you had to do when you were just to beat to party on Well in this report I will show that sleep is a very important part of our lives that those of us that dont have a problem with it take for granted Stages of Sleep The brain waves of a person go through certain constant changes classified as stages 1-4 in the course of the sleep cycle The EEG of a person in the waking state is characterized by alpha waves8-12 cyclessec And low-voltage activity if mixed frequency Stage on only last a few seconds with very low voltageactivity Then it gives way to stage two with a pattern showing frequent spindle-shaped tracing on the EEG called sleep spindles a 13 - 15 cyclessec and certain high-voltage spikes known as K-complexes Soon to follow is the third stage of sleep that begins the appearance of delta waves Eventually in stage four these delta waves occupy the major art of the record Dreaming Sleep If the EEG mumbo jumbo loses you then here the dreaming states will clear things up for you The stages that I wrote about are really how deep of sleep your brain is in When you first lay down to sleep you can notice that you begin to drift off And little by little you are unaware of your surroundings The depth of sleep varies during your sleep The periods are referred to a D-desynchronized or dreaming sleep the remainder of sleep is called Ssynchronized sleep These two states are also known respectively an REMrapid-eye-movement sleep and NREMnon-rapid-eve-movement sleep or just simple active sleep and quiet sleep Functions of Sleep
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