Why are we sleeping?

We've thought, as lay people, because we have essentially to turn ourselves every night (or day for night) and succumb to anything? Because we are programmed to sleep? We need sleep ' reload ' ourselves how many of the devices battery need? Aristotle thought that the digestion of food that is naturally created fumes rose upwards, causing the brain to become sleepy.

Despite the fact that most people spend more time sleeping than any other single activity, scientists still lack much knowledge about why we need sleep or what triggers. Serious scientific studies began only about 60 years ago and were developed many different theories, none of which have been demonstrated. It is known, however, that becomes more important than sleep higher organism for evolutionary chain (man of being the highest).

Is not an accident that the approximate 8-10 hours and traditional "sleeping" period coincides almost exactly with the period of daily and approximately 8-10 hours of total darkness, with which living organisms to cope. Widely held that organisms cannot cope psychologically and lasting long periods of total darkness without going bananas. Hence the evolutionary value to sleep laying down its importance. The heart and the brain (as well as other organs) has evolved as mechanisms for continuous operation which, if properly supplied with oxygen, does not require periods of "sleep". Trees and other plants are not "sleep" because the darkness has no psychological threat given plant life is not conscious, and different from a break of photosynthesis, darkness does not have any evolutionary catastrophe. Similarly, if the ancients could not delete the total darkness, the escape mechanism evolved to adapt to it. To cope with extended periods of darkness, primitive animal life, for long periods of time, adapted to the environment from knowingly entering into a sort of "awe" or unconscious state and with the passage of time, it became a die-hard habitHe changed the genes or something.

Sleep recovery theory was widely accepted, but there may be an explanation as to why failed bats sleep for 8 hours a day, but almost all shrews (Allison & Van Twyer, 1970). In addition, Meddis (1975) argues that shrew, swifts and porpoises From survive without sleep.

Much work has been done regarding the basis of its genesis and significance, however, the question is multifaceted. No single theory of infallible is glad all spectra of the need for sleep and its presence is mystifying. There are some things that our workshops have yet to be explored, possibly from exaggerated lateral thinking. Because our minds are limited by the light of essential knowledge? The concern is there for some reason, waiting to be pursued and captured.

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