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Tired of your own thoughts

11.10.2023

It is known that mental work can cause fatigue no less than physical work. Scientists from the Pitié-Salpêtrière University Hospital in Paris conducted research and, according to them, identified the chemical causes of fatigue associated with mental processes. Experts have suggested that cognitive work leads to chemical changes in the brain.

Scientists believe that mental fatigue is caused by the accumulation of a certain chemical in the brain responsible for regulation. This substance, known as glutamate, is present in the central nervous system of mammals and plays a key role in a variety of processes such as learning, memory and the sleep cycle.

To test their hypothesis, the researchers conducted an experiment. Participants were asked to perform various mental tasks for 6 hours. Half were given simple tasks, and the other half were given more complex ones. Scientists found signs of fatigue only in the group that did more complex tasks.

The researchers used magnetic resonance spectroscopy to measure biochemical changes in the brain. The results showed a measurable difference in glutamate levels between the group that did the difficult tasks and the group that did the easier ones. According to scientists, increased glutamate levels cause the body to use more resources to maintain brain activity, which in turn leads to increased fatigue.

Thus, it can be said that the more we engage in thinking about complex problems, the more we become tired of our own thoughts.

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The harm of music before bed 27.06.2021

Michael Scullin, professor of psychology and neuroscience at Baylor University, conducted a study on sleep patterns. In his work, Dr. Scullin studied the relationship between music indulgence before bed and the quality of sleep. The main topic for study was the phenomenon of "ear worms": obsessive repetitions of the same melody that "gets stuck" in our head and involuntarily scrolls through the brain over and over again.

Usually we can notice this during the daytime, but Dr. Scullin has proven that the same problem happens to us in our sleep. At the same time, the quality of sleep becomes worse and it does not bring the proper benefit to the body.

The scientist based his conclusions on experiments with volunteers, in which more than two hundred people participated, answering various questions about musical habits and sleep quality. All of these music lovers experienced earworm syndrome.

In addition, fifty volunteers were invited to conduct the experiment at the Neurobiology and Cognitive Research Laboratory at Baylor University. In all participants, scientists tried to induce the effect of "ear worms" in order to empirically evaluate their effect on the quality of sleep. At the same time, the activity of the brain, the work of the body and the quality of sleep were assessed using a polysomnograph.

It turned out that those who were used to listening to tunes and songs for the future to sleep in order to sleep better, constantly suffered from the phenomenon of "ear worms" and experienced problems with sleep. This refutes the common belief that music in the evening helps to fall asleep and sleep better. The brain, even during sleep, does not stop analyzing the data obtained while listening to music, which reduces the quality of rest.

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