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What is the dream?
The first question to be clarified is the difference between Sleep and dreams. Sleep calls the state of suspension of activities conscious mind and the will, which occurs periodically (For several hours a day, usually at night) and that enables rest of the muscular system and a change of neuronal activity. Now are studying the importance of sleep period in the settlement of consolidation of memory and learning. The opposite state is the wakefulness or consciousness and will.
The passage of the monitors to sleep and vice versa is regulated by the central nervous system, with special importance reticular system which is located in the brain stem.
Sleep Throughout the body minimizes its metabolic activity, the muscles relax, the heart rate is slower, blood pressure is reduced, and the inspirations are longer and shorter expirations. However, its activity does not decrease brain psychic during sleep. Periods psychic peak phases coincide with those given in the dreams, and studies had shown that employing up Sleep 50% of a newborn, from 30% to 35% at two years, 25% in childhood, youth and adulthood, and from age 65 will be reduced progressively.
