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

A |     近日，巴西一名37岁女性因长期伪装成12岁女童骗取他人收养，被法院判定犯有欺诈罪，判处监禁。据《纽约邮报》报道，涉案女子阿曼达·玛丽亚·索萨·德奥利维拉（Amanda Maria Souza de Oliveira）于2026年6月被捕，8月出庭受审。    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.”。

B | 她在过去14个月里假扮成12岁少女，成功骗过一位教会牧师，后者为她安排了寄养家庭。该家庭承担了她的糖尿病和肥胖症药物费用。

C | 为维持孩童形象，阿曼达用奶瓶喝奶、使用安抚奶嘴、抱着安抚毯入睡，并刻意用尖细嗓音说话。她将自己的外貌归咎于童年遭受虐待和被迫服用激素。在法庭上，阿曼达对伪造身份和年龄的指控供认不讳，但她的律师卢西奥·索萨（Lúcio Sousa）辩称，其行为出于生存需要，而非恶意，“这是她找到的活下去的方式。

D | 她已经在街头流浪了20多年，而且没有任何证据表明她获取了经济利益，或实施了抢劫、盗窃，从理论上讲，欺诈的构成要件并未满足。”阿曼达向法庭表示，她从未想欺骗任何人，只是渴望体验童年从未得到过的关爱。“我内心有一种空虚，一种对那种关怀的渴望，所以我一直在追寻它。

E | ”她原本告诉寄养家庭，自己曾遭受虐待和巫术迫害。

F | 最终，法院认定阿曼达欺诈罪名成立，判处其有期徒刑1年6个月零10天，并附加4个月零18天的拘留处罚。该案件在巴西社会引发广泛讨论，既有人同情其心理创伤，也有人批评其行为对寄养家庭的伤害。

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Published on:22:21:32