sleep
Sleep From these two articles above. ... First part is that why do we sleep. Second part is that the structures of sleep (four stages). The REM sleep is the last part in both articles. ... Why do we sleep? Firstly, we begin from the question that why do we sleep. ... The idea that sleeps is for physical rest and recuperation accords with common sense and with the undeniable fact that at the end of the day we feel tired and crave sleep. ... There is a case on record of a man who abruptly began to lost sleep at age 52. ... An autopsy showed he had lost almost all of the large neurons in two area of the thalamus that have been linked to sleep and hormonal circadian rhythms. And we could get another point that whatever you are a baby or old men, all of us need a sleep from the figure 4. ... Also another point in article one is that sleep is not same as a relaxing. Because of that we usually go to sleep after we had a relaxing. ... Only the sleep could serve the brain, it more useful than a rest of body. From the above information we can get the conclusion that sleep is necessary for human being. And also sleep is not same with relaxing; only sleep could give a serve of the brain. ... It・s a case about a jockey didn・t get a sleep during 201 hours. ... When after 150 hours, his brain waves showed deep sleep rhythms while he was infect behaviorally awake. ... We learn that the sleep is the most important thing in our life this case. From another side if we don・t sleep as well, it will bring weakness, bad emotion and so on. This article point out that sleep and dreams emphasize a restorative role for physiological. From these two different articles, we know that why human need sleep. And the sleep main functions. In additional, if we don・t make a good quality of sleep what will occur on our body?