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Good question... Many different theories, nothing for sure. According to the Freudian school, dreams are the result of subconscious thoughts and desires. The other extreme attributes dreams to random \"noise\" in the neurons without special meaning.
I do not agree with this last opinion, because I think that dreams really can tell us about ourselves.
Some say that dreaming gives us a chance to cope with stress and other emotional crisis that we are unable to cope with in conscious state. One study has shown, that REM sleep may play an important role; properly filing useful information, and helping us in the learning process by reviewing the days more difficult lessons.
Considered physically it\'s because of the stimulation of mainly two areas in our brain, called \"pons\" and \"medulla\", which produce our dreams while sleeping. These two brainareas are also decisive for the beginning and inhibition of the muscle functions, because they send down messages a special cord, called \"Spinal cord\" to inhibit the muscle functions. Which moreover indicates the body\'s inability to move during REM sleep.
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