The Covid-19 would promote a 20-year aging of our cognitive abilities

Neurological disorders, cardiothoracic disorders, smell and taste disorders… It is now estimated that 15% of people who have contracted the coronavirus will see certain symptoms persist over time. If what is now called “Covid lung” is still poorly understood, more and more research is being done to understand the mechanisms behind this evolution of symptoms. The latter, published in the journal eClinicalMedicine and published by The Guardian, reveals the damaging effects of Covid on the brains of patients hospitalized as a result of this virus. Indeed, the researchers observed ongoing cognitive decline in many of them, depending on the severity of their case.
To reach this conclusion, David Menon, a professor at the University of Cambridge and lead author of the study, and his colleagues examined the results of cognitive tests taken by 46 patients, an average of six months after their hospitalization. in Cambridge between March and July 2020. Of these, 16 were placed on the ventilator. The results were then compared with those of nearly 66,000 people from the general UK population.
The scientists found that the hospitalized patients performed significantly worse “on tests of verbal analog reasoning, which assess a person’s ability to recognize links between ideas and think methodically.” Their study also shed light on slower information processing in said patients. According to their conclusions, the deficit observed six months after a severe form was equivalent to the cognitive loss generally observed in a person between the ages of 50 and 70, ie, 20 years of age. This corresponds to a loss of 10 IQ points.
But how can such significant cognitive damage be explained? According to the research team, the reasons are multiple. A severe infection from Covid-19 would first reduce blood flow to the brain. “A blockage of blood vessels and microscopic bleeding caused by the SARS-CoV-2 virus, as well as damage caused by an overactive immune system” may also be at the root of this cognitive decline.
Added to this are the conclusions of previous studies on the long Covid that suggest glucose is used less efficiently after a serious infection “in the part of the brain responsible for attention, complex problem solving and memory,” according to science magazine New Scientist. Slate reports.
This research needs to be deepened to know if this deficit is maintained over time or if it is just a phase of recovery. Nevertheless, the possible occurrence of these conditions should be known to health professionals for better management. “The trials we can conduct will allow us to understand the underlying mechanisms and produce effective treatments to prevent this and perhaps treat it later,” said the study’s lead author, David Menon, who also specifies, in the columns of the Guardian that “if a person is fully vaccinated, the disease will be less severe and all symptoms will decrease”.
In Morocco, the number of new arrivals reached 24,809,721, that of people who received two doses reached 23,288,828, while 6,277,583 people received three injections of the vaccine.
According to the Ministry of Health and Social Protection, a total of 41 new cases of infection with the new coronavirus (Covid-19) and 22 recovery reports have been registered in Morocco in the past 24 hours. The new number of infections brings the total number of infections since the first case reported in Morocco on March 02, 2020 to 1,165,247, while the number of people recovered has risen to 1,148,878, ie a recovery rate of 98.6%.

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