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Biopsychology Research paper Sleep and sleep deprivation Sleep and Sleep Deprivation October 1999 the movie Fight Club was released The story was about a man that suffered from intense insomnia 4 months of consecutive wakefulness Sleep Sleep is the biological process that a person spends almost a third of their life doing After decades of research we still cannot say we have a full understanding of this process One thing that is safe to say is that it has a function considering the large amount of time that organisms spend on it if it was not adaptive it would not survive through evolution As for what kind of function it serves there is still no definite answer Pinel 1999 Rechtschaffan 1998 But there are two main theories that are trying to explain what we do know so far The first theory is the Recuperation Theory which is the way most people perceive and explain sleep It sees sleep as a repairing process that reverses the imbalance of our system caused by daily activity It assumes that activities during our wakefulness disturbs our bodys homeostasis The common concept of needing more sleep to catch up previously lost sleep would belong to this theory The second theory is the Circadian Theory It explains that sleep is just a way for animals to conserve energy and to avoid unnecessary activities It also focuses on circadian rhythms Pinel 1999 Hastings 1997 which are the cycles an animal follows for sleeping and waking with each cycle lasting about 24 hours According to Groos 1983 it is virtually impossible to find a physiological biochemical or behavioral process in animals which does not display some measure of circadian
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