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

A |     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 |     近日，肯德基计划推出一款全新创意汉堡，这款新品将奥利奥巧克力饼干风味融入汉堡面包胚，内部加入炸鸡排，实现零食甜品与快餐炸鸡的产品融合。    这款汉堡的亮点主要在于饼干风味的面包，不同于常规汉堡面包，该产品将奥利奥的饼干风味融入汉堡胚中，再搭配炸鸡排实现与其他产品的差异化。

C | 本次的联名产品也将在8月28日于全国门店限时上架。    此外，肯德基与奥利奥曾推出过吮指原味鸡风味的饼干产品，饼干保留了奥利奥的经典巧克力饼身，但夹心替换为了肯德基的吮指原味鸡口味夹心。    。

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