To define sleep, we could say that it is a process of renewal for the body. Scientists still don't have an explanation for why we should sleep, but for sure they know that sleep is not 'switch off' case for the body. They know that sleep is an essential for many physiological processes, as consolidation of memories. On average, people spend a third of their lives in sleep and that is an evidence for the importance of sleep for us. There are many explanations for sleeping process and what is happening to us during it, but most of them are spiritual and religious explanations. In these days, the scientists start to research the topic. And the question now is what is happening to us during sleep. Nowadays, the scientists can explain the dreaming process scientifically. In the whole history, the humanity has so many explanations for dreaming process, but most of them are religious and spiritual. However, the scientists said that "dream production mechanisms draw bits and pieces of elements within the vast mnemonic repertoire that contains all the information, …show more content…
The only significant thing we lost during sleep is the consciousness, the rest is the same. The activity of the brain during sleep is clearer during rapid eye movement (REM) sleep, in "the thalamocortical system, REM sleep and wakefulness have equivalent electrophysiological signature"(Sejnowski & Destexhe, 2000, P 210). So, we know that sleep is not switch off case for body; it is another stage of process. And Sometimes, the brain is more active during sleep that during wakefulness, for example "coherent activity within fast beta and gamma frequency range between right and left homologous derivations, increased during the three stages of sleep" (Perez-Garci et al, 2001, P118). So, this means that sleep is very important process for the body, not just to make it rest, but also for our