Sleep is something that every person needs. Without sleep a normal days task seem never ending. Your body suffers and you suffer even people who come in contact with you suffer too. Without sleep you can function normally. Your moods change changing your personality, changing how you perceive the world.

The average adult needs eight hours of sound sleep each night. However most adults get between five and six hours, " (Encarta 1998).This one or two hours that is lost each night can have an affect on our health and our lives. "The single element that ties sleep disorders together is that they disrupt in one or more parts of out sleep cycle."(Zimbardo pg.98) The three types of sleep disorders are: insomnia, narcolepsy and sleep apnea. These disorders make a night's sleep sometimes hard and mostly uncomfortable.

" Insomnia is a disorder that involves i

Narcolepsy is a disorder of REM sleep." The victim of narcolepsy has an abnormal sleep -onset REM period. Instead of the usual time it takes REM to occur (ninety minutes) narcoleptics REM period starts as sleep begins." ( Zimbardo Pg.99)

nsufficient sleep." (Zimbardo pg. 98) Insomnia is the most common sleep disorder. Insomnia occurs on a regular basis." Its symptoms are chronic inability to fall asleep quickly, frequent arousals during sleep or early morning awakenings."(Zimbardo pg.98) Insomnia can be caused by stress or constant worrying, medical problems or mental disorders. The lack of sleep can cause depression and heart disease.

Sleep apena is " a respiratory disorder," (Zimbardo pg. 98) in which the person stops breathing while sleeping. "It results from a collapse of the airway, when muscle tone relaxes during sleep. Breathing stops, the blood's oxygen level drops causing the sleeper to awaken and

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