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<p>This study examined electrophysiological patterns in Ukrainian civilians by comparing EEG recordings obtained before (2010–2012, <i>n</i> = 34) and during (2023, <i>n</i> = 31) the ongoing full-scale war. We analyzed absolute EEG spectral power (theta, alpha, beta) during a&#xa0;resting state and a&#xa0;mental arithmetic task. The Post-war cohort exhibited significantly higher alpha and beta power compared to the Pre-war cohort, especially during the cognitive task. Critically, the Pre-war cohort showed typical task-related alpha desynchronization and increased frontal theta power, while the Post-war cohort showed no significant modulation in these bands. These findings indicate a&#xa0;distinct mode of cognitive regulation in the Post-war cohort. The elevated power may reflect a&#xa0;state of heightened inhibitory control, potentially indicative of compensatory adaptation mechanisms. However, this pattern was accompanied by reduced adaptive flexibility, evidenced by the absence of significant neural activity modulation in response to cognitive demands. These neurophysiological differences between cohorts underscore the need for further research with individual stress assessments and longitudinal monitoring.</p>

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EEG insights from Ukrainian civilians: cohort differences before and during war

  • 期刊论文

  • 发表日期：

    2024年12月1日

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  • Yaroslav Subin,
  • Mariia Chernykh,
  • Mykola Makarchuk

摘要

This study examined electrophysiological patterns in Ukrainian civilians by comparing EEG recordings obtained before (2010–2012, n = 34) and during (2023, n = 31) the ongoing full-scale war. We analyzed absolute EEG spectral power (theta, alpha, beta) during a resting state and a mental arithmetic task. The Post-war cohort exhibited significantly higher alpha and beta power compared to the Pre-war cohort, especially during the cognitive task. Critically, the Pre-war cohort showed typical task-related alpha desynchronization and increased frontal theta power, while the Post-war cohort showed no significant modulation in these bands. These findings indicate a distinct mode of cognitive regulation in the Post-war cohort. The elevated power may reflect a state of heightened inhibitory control, potentially indicative of compensatory adaptation mechanisms. However, this pattern was accompanied by reduced adaptive flexibility, evidenced by the absence of significant neural activity modulation in response to cognitive demands. These neurophysiological differences between cohorts underscore the need for further research with individual stress assessments and longitudinal monitoring.