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

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 |     近日，重庆市渝北区居民彭某在吉林省吉林市小雾凇岛游玩时受伤。当地一个名为李忠武的63岁老人将其送医，并垫付3740元的费用。彭某并未偿还这笔钱。吉林市文旅局了解此事后，为李忠武补偿了3700元。此事一经曝光，引发网友热议。1月14日中午，重庆渝北区文化和旅游发展委员会发布“情况说明”称，网传内容与事实有出入，有关方面正进一步开展调查。吉林市文旅局补偿李忠武3700元据报道，上述事件发生于2024年12月3日上午，地点为吉林市阿什小雾凇岛。对于事发经过，辖区派出所的周警官表示，通过治安监控看到，该游客摔倒在一处台阶上，距离李忠武的狗爬犁一米多远。吉林市文化广播电视和旅游局工作人员1月10日在接受媒体采访时表示，目前大爷已收到补偿，对于游客已没有其他诉求。该工作人员还表示，此事的基本事实相对清楚，吉林省文旅厅高度重视此事，重庆文旅局方面的态度也非常积极，目前重庆警方和文旅局已介入。狗爬犁1月14日，重庆市渝北区文旅委表示，该委找到当事人彭某详细了解情况。彭某自述网上反映情况不实。该委协同公安部门对有关情况做了初步核查，据现场目击证人证言和新发现的相关视频显示，网传内容与事实有出入。目前，有关方面正进一步开展调查，后续情况将及时向社会公布。来源：长安街知事微信公众号记者：秦羽。

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