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Scientists Explain Why Taxing Mental Work Wears You Out_我的网站

一 |     　　央视网消息(新闻联播)：今年以来，我国高端装备制造、高技术制造业不断实现新突破，新动能加快成长壮大，推动工业经济加速向新、向优发展。

二 | 　　最新数据显示，1—7月，以高技术制造业和数字产品制造业等为代表的新动能领域对规模以上工业增加值增长的贡献率为五成左右，比上半年提高约3个百分点。

三 | 从产品看，人工智能带动传感器、存储芯片、光纤等产品产量快速增长。从行业看，集成电路制造、飞机制造、智能设备制造等行业增长明显加快。在安徽，今年以来，集成电路产业同比增长超过三倍，多年布局的一批产业项目眼下迎来收获期。　　新动能不仅激活国内生产，也不断打开海外市场新空间。    A team of scientists has discovered a likely explanation for why one may feel exhausted after engaging in intense cognitive work.,In their study, published in the Current Biology last week, the researchers argue that intense cognitive work, when it lasts for several hours, results in the buildup of potentially toxic byproducts in the prefrontal cortex part of the human brain, which then affects a person’s behavior.,“Influential theories suggested that fatigue is a sort of illusion cooked up by the brain to make us stop whatever we are doing and turn to a more gratifying activity,” Mathias Pessiglione of Pitié-Salpêtrière University in Paris, said as quoted in a news release by Cell Press. “But our findings show that cognitive work results in a true functional alteration—accumulation of noxious substances—so fatigue would indeed be a signal that makes us stop working but for a different purpose: to preserve the integrity of brain functioning.”,During the course of their research, the team employed magnetic resonance spectroscopy to monitor the brain chemistry of two groups of people during a workday, with one group performing easy cognitive tasks while the other engaged in more complex mental activities.,Only the latter group ended up exhibiting signs of fatigue, as well as a tendency to favor “options proposing rewards at short delay with little effort,” as the news release put it.,AmericasChild Survives After 7 Minutes Without Blood Flow to Brain During Surgery, US Cardiologist Reveals11 August, 16:41 GMT,Furthermore, members of that group had higher levels of glutamate in the synapses of the prefrontal cortex, leading the researchers to suggest that the accumulation of glutamate “makes further activation of the prefrontal cortex more costly,” and thus a mentally exhaustive workday makes cognitive control more difficult.,Unfortunately, there seems to be no fancy way to deal with this problem other than the tried and tested method that is probably as old as history itself.,“I would employ good old recipes: rest and sleep!” Pessiglione remarked. “There is good evidence that glutamate is eliminated from synapses during sleep.”。7月份，我国工业品出口保持两位数增长，其中，汽车、电子行业出口交货值分别增长41.2%、8.4%，对全部规模以上工业出口交货值增长的贡献率分别达25.8%、30.7%，工业经济国际竞争力不断增强。　　来源：央视网。

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