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

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8月19日，打桩船在黄骅港综合港区滚装码头一期工程项目施工现场施工。    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.”。连日来黄骅港综合港区滚装码头一期工程项目现场各参建单位抢抓施工窗口期全力推动项目建设提速增效据了解该工程总投资16.2亿元规划建设1个5万总吨客货滚装泊位1个7万总吨汽车滚装泊位项目建成投运后将大幅提升港区滚装运输承载能力

8月19日拍摄的黄骅港综合港区滚装码头一期工程项目施工现场。

8月19日，工人在黄骅港综合港区滚装码头一期工程项目施工现场忙碌。

8月19日，工人在黄骅港综合港区滚装码头一期工程项目施工现场忙碌。摄影报道丨苑立伟。

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