Human Sleep Cycle

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Over the years there has been significant research done, concerning the human sleep cycle. When we are sleeping we are not physically conscious, however our brains are still working. Within ninety minutes the human brain goes through the four stages of the sleep cycle. To start it out, the first cycle is the REM sleep cycle, this stands for rapid eye movement sleep. While the eyes are shut to go to sleep, the eyes continue to move quickly. This is all caused by rapid activity going on within the brain, in many cases this can happen during a dream. Next as we slowly drift off to sleep our brain waves start to become irregular, and our bodies relaxed and begin to breathe slower, this stage is known as the NREM-1. During this stage one can expect