Dysfunctional attentional control is observed in patients with mental disorders. However, there is no established neurophysiological method to assess attention in such patients. We showed a discrepancy in alpha-band power in the tasks that evoked internal and external attention event-related alpha-band power changes in healthy subjects during self-reflection (SR) and working memory (WM) tasks in a preliminary study. In this study, we aimed at elucidating event-related alpha-band power changes in healthy subjects during the tasks, addressing the shortcomings of the previous study. Sixteen healthy volunteers were examined for the event-related power (ERpow) change during the tasks. The results demonstrated the discrepancy of alpha-band ERpow at 8, 10, and 12 Hz in the parieto-occipital area between the WM and SR tasks for a period between a target stimulus and a command stimulus, where a participant switched to internal attention from external attention according to the SR task and remained at external attention according to the WM task. The results suggest that alpha-band ERpow in this area is associated with the direction of attention in response to cognitive stimuli, indicating that the findings of ERpow during the two tasks would potentially aid in the clarification of the pathophysiology of the dysfunctional change in attention in patients with psychiatric disorders.

中文翻译：

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健康个体在自我反思和工作记忆任务期间与事件相关的 Alpha 波段功率变化

在精神障碍患者中观察到功能失调的注意力控制。然而，还没有确定的神经生理学方法来评估此类患者的注意力。在初步研究中，我们在自我反思 (SR) 和工作记忆 (WM) 任务期间显示了在健康受试者中引起内部和外部注意事件相关 alpha 波段功率变化的任务中 alpha 波段功率的差异。在这项研究中，我们旨在阐明健康受试者在任务期间与事件相关的 alpha 波段功率变化，解决先前研究的缺点。检查了 16 名健康志愿者在任务期间的事件相关功率 (ERpow) 变化。结果表明 α 波段 ERpow 在 8、10、和 12 Hz 在 WM 和 SR 任务之间的顶枕区，在目标刺激和命令刺激之间的一段时间内，参与者根据 SR 任务从外部注意切换到内部注意，并根据WM 任务。结果表明，该区域的 α 波段 ERpow 与响应认知刺激的注意力方向相关，表明在这两项任务中 ERpow 的发现可能有助于澄清注意力异常变化的病理生理学精神障碍患者。