Gamma band activity and the P3 reflect post-perceptual processes, not visual awareness.
Gamma band activity and the P3 reflect post-perceptual processes, not visual awareness.
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DOI：
10.1016/j.neuroimage.2014.07.024
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发表时间：
2014-11-01
期刊：
影响因子：
5.7
通讯作者：
Hillyard SA
中科院分区：
文献类型：
--
作者：
Pitts MA;Padwal J;Fennelly D;Martínez A;Hillyard SA
A primary goal in cognitive neuroscience is to identify neural correlates of conscious perception (NCC). By contrasting conditions in which subjects are aware versus unaware of identical visual stimuli, a number of candidate NCCs have emerged, among them induced gamma band activity in the EEG and the P3 event-related potential. In most previous studies, however, the critical stimuli were always directly relevant to the subjects’ task, such that aware versus unaware contrasts may well have included differences in post-perceptual processing in addition to differences in conscious perception per se. Here, in a series of EEG experiments, visual awareness and task relevance were manipulated independently. Induced gamma activity and the P3 were absent for task-irrelevant stimuli regardless of whether subjects were aware of such stimuli. For task-relevant stimuli, gamma and the P3 were robust and dissociable, indicating that each reflects distinct post-perceptual processes necessary for carrying-out the task but not for consciously perceiving the stimuli. Overall, this pattern of results challenges a number of previous proposals linking gamma band activity and the P3 to conscious perception.
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DOI：
10.1073/pnas.0809667106
发表时间：
2009-02-03
影响因子：
11.1
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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DOI：
10.1038/nrn3241
发表时间：
2012-05-18
期刊：
Nature reviews. Neuroscience
影响因子：
--
作者：
Buzsáki G;Anastassiou CA;Koch C
通讯作者：
Koch C
影响因子：
2.4
作者：
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通讯作者：
Bachmann, Talis