60秒科学:Genetic Protection against Sleep Deprivation

Genetic² Protection against Sleep Deprivation³
A study in The Journal of Neuroscience finds that people with a particular version of a gene¹ called Period 3 are better able to handle sleep deprivation because more of their brains get involved in counteracting⁴ the lack of zzz's. Cynthia Graber reports

[The following is an exact transcript⁵ of this podcast.]

Numerous studies have shown that lack of sleep hurts—it can lead to weight gain, diseases, and of course weakened cognitive⁶ 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 genetic marker called Period 3 known to predict the effects of sleep deprivation. People with short versions of the gene 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’s night sleep, I should probably write my scripts in the morning.

—Cynthia Graber

1 gene   

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。

2 genetic   

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。

3 deprivation   

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。

4 counteracting   

对抗，抵消( counteract的现在分词 )

参考例句：

• The turmoil, he said, was "counteracting the course of global civilization. " 这次骚乱，他指出，“阻碍了世界文明的进程”。
• But he notes that there are counteracting forces as well. 但是他也指出还有一些抵消因素。

5 transcript   

n.抄本，誊本，副本，肄业证书

参考例句：

• A transcript of the tapes was presented as evidence in court.一份录音带的文字本作为证据被呈交法庭。
• They wouldn't let me have a transcript of the interview.他们拒绝给我一份采访的文字整理稿。

6 cognitive   

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。