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SSS 2009-06-29

时间:2010-05-18 03:02来源:互联网 提供网友:mark@li   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science, I'm Cynthia Graber. This will just take a minute.

 Numerous studies have shown that lack of sleep hurts—it can lead to weight gain, diseases, and of course weakened cognitive1 functioning. But a bad night’s sleep doesn’t hurt everyone equally. Unlike me, some people can think clearly no matter what. A study published June 24th in The Journal of Neuroscience helps explain why.

Scientists looked for a genetic3 marker called Period 3 known to predict the effects of sleep deprivation4. People with short versions of the gene2 do okay when they lose sleep. But the longer gene leads to suffering with lack of sleep.

 

Researchers tested attention and cognition before and after both good and bad nights’ sleeps. Those with the long Period 3 had poor function in the part of the brain that would usually spring to life. Even after a decent night, the long-gene people had reduced brain activity towards the end of the day. But folks with the short gene did better, and their brains even pulled in extra assistance from surrounding brain areas. I can guess which variation of the gene I have— which means not only should I get a good night’s sleep, I should probably write my scripts in the morning.

 

Thanks for the minute for Scientific American's 60-Sceond Science. I'm Cynthia Graber.

 


点击收听单词发音收听单词发音  

1 cognitive Uqwz0     
adj.认知的,认识的,有感知的
参考例句:
  • As children grow older,their cognitive processes become sharper.孩子们越长越大,他们的认知过程变得更为敏锐。
  • The cognitive psychologist is like the tinker who wants to know how a clock works.认知心理学者倒很像一个需要通晓钟表如何运转的钟表修理匠。
2 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
3 genetic PgIxp     
adj.遗传的,遗传学的
参考例句:
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
4 deprivation e9Uy7     
n.匮乏;丧失;夺去,贫困
参考例句:
  • Many studies make it clear that sleep deprivation is dangerous.多实验都证实了睡眠被剥夺是危险的。
  • Missing the holiday was a great deprivation.错过假日是极大的损失。
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TAG标签:   SSS  Neuroscience
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