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睡眠的生理功能

长期以来,睡眠的生理功能尚未明确。在大多数人的心目中,睡眠与休息和精神再生的时间。恢复,保护和节能的睡眠理论已经相当流行,直到最近,当它变得明显一个长期睡眠期抑制意识似乎并没有要以正确的方式解决资源枯竭,有毒废物的演变或节约能源(例如,你的肌肉不关闭完全得到休息)。睡眠的关键作用是显着的说明最终死于慢性睡眠剥夺大鼠的实验(通常在2.5周)。见:REM是参与记忆形成的? 在进化过程中,睡眠是一个非常古老的现象,它显然必须发挥作用,是生存的关键。最近才,它已被证明毫无疑问,睡眠的功能与学习! ([2]不是所有的科学家都同意!) 研究人员早就知道海马特别重要,一个小的大脑器官,记忆的形成。然而,它一直很难找出什么是它区别于其他地区,也表明突触可塑性的大脑皮层的海马特别的,即储存记忆的能力。 Ground-breaking theories of Dr György Buzsáki and his two-stage model of memory trace formation have inspired further research that sheds new light on what is actually happening during sleep [Buzsáki, 1989] (do not confuse this two-stage model with the two-component model of memory or with the two-component model of sleep regulation below). Using his knowledge of neural networks, ingenuous experiments on neuronal firing, and sophisticated mathematical analysis of spatiotemporal firing patterns, Buzsáki provided an good model explaining how the two components of sleep, REM and non-REM sleep, work together to consolidate memories. The hippocampus acts as the central switchboard for the brain that can easily store short-term memory patterns. However, these patterns have to be encoded in the neocortex to provide space for coding new short-term memories. This complex process of rebuilding the neural network of the brain takes place during sleep. Unlike rest or conservation of energy, this highest feat of evolutionary neural mathematics, requires the brain to be shut off entirely from environmental input! This automatic rewiring is the main reason for which we sleep and why there is no conscious processing involved! During sleep, the brain works as hard as during SAT or GRE exams. It rewires its circuits to make sure that all newly gained knowledge is optimally stored for future use. If you have some basic understanding of neurophysiology and neural networks, here is an article that makes an excellent reading about the neural functions of sleep: Slow wave sleep contribution to memory consolidation.  

Source: http://www.supermemo.com/articles/sleep.htm

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