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NATO nuclear drills steadfast noon to run from Oct 17-30_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 |     Moscow, Oct 14 (UNI) The planned NATO nuclear military exercises Steadfast Noon will be held from October 17, the alliance said on Friday.
"Air forces from across NATO will exercise nuclear deterrence capabilities involving dozens of aircraft over north-western Europe starting on Monday (17 October 2022). The exercise, which runs until 30 October, is a routine, recurring training activity and it is not linked to any current world events," the alliance said in a statement.
The drills involve 14 countries and up to 60 aircraft of various types, including as well as surveillance and tanker aircraft, the statement added.
"Training flights will take place over Belgium, which is hosting the exercise, as well as over the North Sea and the United Kingdom. No live weapons are used," NATO said.
UNI/SPUTNIK GNK。

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