The Lancet's Journal of Clinical Medicine published the results of a British study, titled "Cognitive deficits in people who have recovered from Corona", about the impact of severe infection with the Corona virus on intelligence.
The study sample consisted of 81,337 participants who took a web-based, clinically validated assessment known as the Great British Intelligence Test in 2020.
Some studies suggest that there are four primary ways in which corona affects the brain, in the most obvious case, viral particles directly attack brain cells, inflammation in the brain may also occur as a result of reduced blood flow or oxygen levels to the brain, our immune response may also play a role in Reducing brain function, and finally the psychological trauma that some patients suffer after infection with the virus.
The researchers adjusted the participants' scores based on factors such as gender, age, education level and income, and then the results were compared with those who had experienced the coronavirus.
The study revealed that even months after contracting the Corona virus, those who recovered performed significantly worse than their peers, especially during tests designed to measure reasoning, problem solving and memory.
Experts have noted the cognitive effects associated with the coronavirus, biological or psychological, and many reports have been doing studies of individuals who have recovered from the coronavirus, and who suffer from symptoms such as brain fog that impairs their ability to focus and perform even the most routine tasks, and they stress that there is still much that is not We know about the after-effects of a coronavirus infection, whether it's short or long term.
Adam Hampshire, Associate Professor in the Computational, Cognitive and Clinical Neuroimaging Laboratory, at Imperial College London, and the study's lead author, said: "By coincidence, the epidemic escalated in the UK in the middle of the period when I was collecting health data on a very large scale, as part of the BBC2 collaboration. Horizon with the Great British Intelligence Test".
He added, "A number of my colleagues contacted me, and indicated that this provided an opportunity to collect important data, on how the epidemic and Corona disease affected mental health and cognition."
The study showed that patients who were transferred to the hospital or placed on ventilators, scored an average decrease of 7 IQ points, and patients in the hospital who did not need ventilators performed slightly better, but scored worse average scores than people who reported having had a stroke. Slight decreases were also evident in participants who experienced mild symptoms of corona.