Qiu Zeguo, Zhang Jun, Pegna Alan J
School of Psychology, The University of Queensland, Brisbane 4072, Australia.
School of Psychology, The University of Queensland, Brisbane 4072, Australia.
Conscious Cogn. 2023 Jan;107:103449. doi: 10.1016/j.concog.2022.103449. Epub 2022 Nov 28.
The neural fate of task-irrelevant emotional faces under different awareness conditions is poorly understood. Here, we examined the electrophysiological activity during an experiment where the location of target information (contrast-induced line) was manipulated orthogonally to the location of task-irrelevant fearful faces, under subliminal or supraliminal viewing conditions. We found that only target lines elicited an N2-posterior-contralateral (N2pc), indexing spatial attention shifting, in the supraliminal condition. No N2pc was found for the targets in the subliminal condition or for task-irrelevant fearful faces in either conditions. However, the mere presence of a fearful face enhanced early neural activity between 200 and 300 ms only in the subliminal condition. Additionally, the presence of a target line, but not a fearful face, enhanced the P3. Our results suggest that the N2pc is dependent on visual awareness and task-relevancy of the information and that laterally-presented task-irrelevant fearful expressions can be processed without awareness during early visual processing.
在不同的意识条件下，与任务无关的情绪面孔的神经命运尚未得到充分理解。在这里，我们在一个实验中检查了电生理活动，在该实验中，目标信息（对比度诱导线）的位置与与任务无关的恐惧面孔的位置正交操纵，处于阈下或阈上观看条件下。我们发现，只有目标线在阈上条件下引发了N2-后对侧（N2pc），这表明空间注意力发生了转移。在阈下条件下的目标或在任一条件下与任务无关的恐惧面孔均未发现N2pc。然而，仅在阈下条件下，恐惧面孔的单纯出现就增强了200至300毫秒之间的早期神经活动。此外，目标线的存在而非恐惧面孔的存在增强了P3。我们的结果表明，N2pc取决于信息的视觉意识和任务相关性，并且在早期视觉处理过程中，横向呈现的与任务无关的恐惧表情可以在无意识的情况下进行处理。
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