Think tired and the fatigue caused by this activity is a kind of red alarm to preserve the functions of our brain. Prolonged thinking for several hours causes thickening of toxic gasses in the part of the brain called prefrontal cortex.
A group of researchers advises against making decisions when tired. In such circumstances, the brain is likely to prefer options that yield quick rewards and with little effort. Scholars with Antonius Wiehler at the top have the magnetic resonance spectroscopy control brain activity during a working day.
Fatigue occurs only in the group engaged in more intense mental activities. Here these people have higher levels of a molecule called glutamate located in the prefrontal cortex. So the culprit of fatigue is the accumulation of glutamate. This makes cognitive control more difficult after a mentally demanding day of work.
Our results show that cognitive work results in a real functional change, so fatigue would be a signal that makes us stop working to maintain the integrity of brain functioning. Unfortunately, I don’t think there is a way around this limitation of our brain. I would recommend the old remedy: rest and sleep. In fact, there is a lot of evidence that glutamate is eliminated during sleep.
Mathias Pessiglione, one of the authors of the study
Source: Lega Nerd
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