why people sleep?

People tend SLEEP BECAUSE IT is in our genes. The sense of sleep is rest, which our body receives at this time. However, the more we are engaged in the study of sleep, the more open the secrets relating to the work of the brain.

SON - CONDITION very difficult. During sleep, the brain does not stop its activity. Inside a dream come very important rhythmic 90-minute cycles. Each of these cycles consists of a gradual, slow dive into a deep sleep, and then a sharp transition in the phase of dreams - the so-called fast or REM sleep. At the end of the REM sleep cycle or complete, and we wake up, a new cycle begins. The structure of the human brain is that in the first half of the night is dominated by deep slow wave sleep and in the morning is enhanced REM sleep. In other words, dreams are dreams in the morning. As suggested by scientists, with a fast sleep is related to many diseases. Most of the deaths, strokes and heart attacks occur in the morning - just when it is paradoxical sleep stage.