感知
脑电图
阿尔法(金融)
阿尔法节律
感觉系统
认知心理学
心理学
人口
节奏
视觉感受
生物
神经科学
听力学
作者
Francesco Di Gregorio,Jelena Trajkovic,Cristina Roperti,Eleonora Marcantoni,Paolo Di Luzio,Alessio Avenanti,Gregor Thut,Vincenzo Romei
出处
期刊:Current Biology
[Elsevier]
日期:2022-01-24
卷期号:32 (5): 988-998.e6
被引量:7
标识
DOI:10.1016/j.cub.2022.01.003
摘要
It is commonly held that what we see and what we believe we see are overlapping phenomena. However, dissociations between sensory events and their subjective interpretation occur in the general population and in clinical disorders, raising the question as to whether perceptual accuracy and its subjective interpretation represent mechanistically dissociable events. Here, we uncover the role that alpha oscillations play in shaping these two indices of human conscious experience. We used electroencephalography (EEG) to measure occipital alpha oscillations during a visual detection task, which were then entrained using rhythmic-TMS. We found that controlling prestimulus alpha frequency by rhythmic-TMS modulated perceptual accuracy, but not subjective confidence in it, whereas controlling poststimulus (but not prestimulus) alpha amplitude modulated how well subjective confidence judgments can distinguish between correct and incorrect decision, but not accuracy. These findings provide the first causal evidence of a double dissociation between alpha speed and alpha amplitude, linking alpha frequency to spatiotemporal sampling resources and alpha amplitude to the internal, subjective representation and interpretation of sensory events.
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