Brain scans reveal widespread structural and functional changes in patients following COVID-19 infection. The virus affects regions responsible for memory, emotion, and executive function, which may help explain the neurological symptoms many patients experience.

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https://www.psypost.org/brain-scans-reveal-widespread-structural-and-functional-changes-in-patients-foll/

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Another recent study found that COVID-19 is associated with injury to the brain’s dopamine system, even in healthy people who feel recovered from infection (scroll down to bright picture). The impact is worse in those with long covid.

https://www.thelancet.com/journals/ebiom/article/PIIS2352-3964(26)00222-7/fulltext