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ID: #1095
Sleep cycle
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The sleep cycle of four stages and lasts about 90 to 120 minutes. Dreams can occur in any of the four stages of sleep. In 5 percent cases, dreams occur in the last stage of sleep to as REM sleep stage. Often the sleep cycle repeats after an hour and the process continues. That is how a person has several different dreams in one night. Most people remember dreams that occur in the morning when they are about to wake up. But, some persons can’t remember their dreams. The stages in the sleep cycle are by the changes in the specific brain activity. In stage one, man is in NREM when muscle relaxation, lowered body temperature and slowed heart rate is observed. In the dreaming process, adrenaline is secreted, blood pressure increases and heart beats become faster. People with a weak heart may die in sleep. Researches have shown that people who are deprived from REM, exhibit symptoms of and anxiety. Deprivation of REM sleep causes over-senility, lack of concentration and memory loss. So, dreaming helps tackle stress, the mind is recharged and the body is revitalized. Dreaming transcends the mere unconscious aspects of social, emotional and personal awareness.
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