Australian National University, Canberra, Australia; University of Newcastle, Newcastle, Australia.
Australian National University, Canberra, Australia; University of Newcastle, Newcastle, Australia.
Conscious Cogn. 2021 Jan;87:103034. doi: 10.1016/j.concog.2020.103034. Epub 2020 Dec 3.
Pre- and post-stimulus oscillatory activity between 8 and 12 hertz, referred to as the alpha-band, correlates with conscious visual awareness of stimuli across a variety of psychophysical tasks. Within an EEG-adapted inattentional blindness task, the current study sought to examine whether this relationship holds for conscious awareness of stimuli under conditions of inattentional blindness. Noticing rates of the task-irrelevant unexpected stimulus were correlated with a significant decrease in alpha power over bilateral parietal-occipital areas during the pre-stimulus interval, and a significant decrease in alpha power over parietal-occipital regions in the right hemisphere during the post-stimulus interval. Findings are taken to imply alpha-band neural activity represents a valid correlate of consciousness that is not confounded by task relevancy or the need for report.
在各种心理物理任务中，8 到 12 赫兹之间的刺激前和刺激后振荡活动，被称为 alpha 波段，与对刺激的有意识视觉感知相关。在 EEG 适应的疏忽盲任务中，本研究试图检查在疏忽盲条件下对刺激的有意识感知是否存在这种关系。在任务无关的意外刺激的注意率与在刺激前间隔期间双侧顶枕区域的 alpha 功率显著降低，以及在刺激后间隔期间右半球顶枕区域的 alpha 功率显著降低相关。研究结果表明，alpha 波段神经活动代表了意识的有效相关物，不受任务相关性或报告需求的影响。
