Sedat, Yasin, Erman, Altunisik, Yasemin, Firat Ekmekyapar · Ideggyogyaszati szemle · 2023 · DOI
This study looked at young adults who had COVID-19 and compared them to those who hadn't. Researchers found that people who had COVID-19 reported more mental fatigue (difficulty concentrating and feeling mentally tired) and had more trouble switching between different tasks. These problems lasted long after the initial infection, suggesting COVID-19 may have lasting effects on how the brain works.
This research documents long-term cognitive dysfunction in post-COVID populations, which parallels neurological complaints seen in ME/CFS. Understanding whether PASC and ME/CFS share common mechanisms of mental fatigue and cognitive impairment could inform treatment approaches for both conditions and validate patient-reported cognitive difficulties as a measurable biological phenomenon rather than psychological distress alone.
This study cannot establish causation—only association between prior COVID-19 and current cognitive symptoms. It does not prove that COVID-19 directly damages the brain versus other mechanisms producing these effects. The study also does not define post-exertional malaise rigorously or demonstrate that cognitive symptoms worsen with exertion, limiting direct comparison to ME/CFS diagnostic criteria.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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