This is associated with short-term memory problems, difficulty in multi-tasking or concentration over long periods of time.Īs A/Prof. The cognitive dysfunctions experienced by those with long COVID manifest most often as a lack of mental focus or clarity, or mental fatigue that is unusual compared to one’s previous capacity, especially after a cognitively demanding task (for example reading complex instructions, participating in a meeting that demands high concentration level, watching a documentary on a topic that is new and complex). “However, we now know that besides fatigue, cognitive changes are the most common symptoms associated with long COVID.” This is not surprising as the immune system is involved across all body functions,” says A/Prof. “Long COVID is a multi-organ disease, so people are differently affected across several of their body functions. In fact, over 200 different symptoms have been recorded as part of the long COVID disease profile. Understanding Long COVID and ‘Brain Fog’Ĭurrent evidence compiled by the World Health Organisation (WHO) suggests approximately 10–20 percent of people experience a variety of mid and long-term effects after they recover from their initial illness.
“These findings lay the foundation for the kynurenine pathway as a potential diagnostic and monitoring marker, as well as a possible therapeutic target,” A/Prof. The discovery opens up possibilities for identifying and treating people who are experiencing the cognitive effects of long COVID and perhaps long COVID in general. Our study speaks to the contrary, that there is a real biological mechanism behind long COVID brain fog,” A/Prof. “I think when patients go to the doctor’s with brain fog, it may be dismissed as a psychological problem. The study, published recently in Annals of Clinical and Translational Neurology, helps demonstrate that there is a biological change underlying brain fog in people who have long COVID as a result of mild acute COVID-19 infection. “The current study specifically found that an important metabolic pathway – the kynurenine pathway – is linked to the cognitive changes we’re seeing in this group of patients.” “Together, this study and a previous study in the ADAPT program show that long COVID brain fog is associated with a dysregulation of the immune response,” says Associate Professor Lucette Cysique, lead author of the study. Patients who participated in this study had mild to moderate acute COVID-19 and were enrolled in the St Vincent’s COVID-19 ADAPT study, a longitudinal study led by Professor Gail Matthews.
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