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

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一 | 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.”。

二 | 　　讯中国人民银行8月14日发布2026年7月金融统计数据报告。初步统计，2026年7月末社会融资规模存量为463.27万亿元，同比增长7.4%。其中，对实体经济发放的人民币贷款余额278.57万亿元，同比增长5.2%；对实体经济发放的外币贷款折合人民币余额1.19万亿元，同比下降1.7%；委托贷款余额11.24万亿元，同比增长0.7%；信托贷款余额4.6万亿元，同比增长3.2%；未贴现的银行承兑汇票余额1.97万亿元，同比增长2.7%；企业债券余额36.47万亿元，同比增长9.2%；政府债券余额102.68万亿元，同比增长14.1%；非金融企业境内股票余额12.6万亿元，同比增长5.5%。　　从结构看，7月末对实体经济发放的人民币贷款余额占同期社会融资规模存量的60.1%，同比低1.3个百分点；对实体经济发放的外币贷款折合人民币余额占比0.3%，同比持平；委托贷款余额占比2.4%，同比低0.2个百分点；信托贷款余额占比1%，同比持平；未贴现的银行承兑汇票余额占比0.4%，同比持平；企业债券余额占比7.9%，同比高0.2个百分点；政府债券余额占比22.2%，同比高1.3个百分点；非金融企业境内股票余额占比2.7%，同比低0.1个百分点。版权申明：凡注有“”或电头为“”的稿件，均为独家版权所有，未经许可不得转载或镜像；授权转载必须注明来源为“”，并保留“”的电头。。

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