Uzamış COVID Hastalarında Simon Görevi ile Bilişsel Etkilerin Değerlendirilmesi.

Aim: The long-term effects of COVID-19 started to be reported and it was referred to as long-covid syndrome for cases lasting longer than 12 weeks, while the pandemic was continuing in the world. The most prominent expression of longcovid syndrome was its symptoms on the nervous system. These effects were called "brain fog" due to long covid syndrome. In this study, we aimed to examine the neurocognitive effects in participants who had illness with COVID-19. Methods: For this purpose, 36 participants of similar age group who had COVID-19 within 12 weeks of their diagnosis, as well as 35 participants who had not been diagnosed with COVID-19, were included in the study. In this study, an auditory task prepared to test the orientation effect called Simon effect was applied to the participants. EEG recordings were taken simultaneously. During the task, event-related potentials were recorded on the recordings of all participants. Results: In the behavioral results of the study, there was no difference in the test success rate between the groups. However, the patient group showed an increase in task completion and reaction times compared to the control group. In the event-related potential recordings, almost all wave amplitude and latency were the same for the two groups in congruent stimulus presentation. On the contrary, a significant difference was observed between N2 amplitude and latencies in incongruent stimulus presentation. However, P3 Δt in the covid group increased compared to the control group. The increase in reaction time in the covid group observed in our study results was also confirmed in electrophysiologic measurements. Conclusion: The results showed that COVID-19 decreased the inhibitory process during the formation of attention and preparation of response to stimuli. COVID-19-induced brain fog occurred in the pre-processing steps of attention. [ABSTRACT FROM AUTHOR]