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

A |     10月25日，记者在顺城区新城路东段道路改造施工现场看到，沥青运输车、摊铺机、压路机等机械设备正在来回穿梭，施工人员紧张有序地进行铺平作业，现场机械轰鸣，一派热火朝天的施工景象。         　　此次道路升级改造工程是狠抓基础设施建设、更新城市面貌的重要体现，更是改善群众出行条件、提升居民生活品质的民生实事。为确保市民出行安全及工程施工进度，我市提前研究交通疏导方案，制订应急预案，对部分路段实施半幅封闭，并部署警力加强管控。

B |     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.”。施工过程中，施工人员严格按照规范操作，确保每一道工序都符合质量要求。         　　据了解，此次新城路东段道路改造工程范围东起永城街，西至长城街，道路全长1.8公里，宽为30米，双向8车道。

C | 改造主要对现有路面进行洗刨、沥青重铺、排水井维修、路边石垒砌等，改造将在10月底前完工。

D |                     责任编辑：李丹。

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Published on:05:54:56