TED： 睡 眠 不足会发生什么？ In 1965, 17 year-old high school student Randy Gardner stay awake for 264 hours, that's 11 days ,to see how he'd cope without sleep. On the second day his eyes stopped focusing. Next he lost the ability to identify objects by touch. By day three, Gardner was moody and uncoordinated. At the end of the experiment, he was struggling to concentrate, had trouble with short term memory, became paranoid and started hallucinating. Although Gardner recovered without long term psychological or physical damage, for others losing shut-eye can result in hormone imbalance, illness, and extreme cases, death. We're only beginning to understand why we sleep to begin with, but we do know it's essential. Adults need 7 to 8 hours sleep at night, and adolescents need about 10. 1965 年 ， 17 岁 的 高 中 生 兰 迪 加 纳 德 持 续 264 小 时 ， 也 就 是 11 天 不 睡 觉 ， 想 看 看 会 发 生 什 么 。在持 续 不 睡 的 第二天 ， 他的 眼睛停止了聚焦。随后， 他丧失了通过触摸鉴别事物的 能力。到了第三天 ， 加 纳 德 变得焦躁且笨拙。实验结束时 ， 他已经不 能集中 注意力。短期记忆力出现问题， 变得偏执且开始出现幻觉 。虽然实验并未对加 纳 德 造成任何心理或生 理上的 长期损伤， 但对有些人来说， 不 睡 觉 会 导致激素分泌失调， 疾病甚至死亡。一开始我们只是 意识到人类需要睡 眠。却不 知道其根本原因。成年 人每晚需要 7 至 8 小 时 的 睡 眠， 青少年 则需要 10 小 时 。 We grow sleepy due the signals from our body telling our brain we are tired, and signals from the environment telling us it's dark outside. The rise in sleep inducing chemicals, like adenosine and melatonin, send us into a light dose that grows deeper. Making our breathing and heart rate slow down and our muscles relax. This non REM sleep is when ...
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