感知
神经科学
意识
心理学
功能磁共振成像
抑制性突触后电位
脑磁图
意识的神经相关物
默认模式网络
认知心理学
丘脑
视觉感受
认知
脑电图
作者
Jeehye Seo,Dae-Jin Kim,Sang-Han Choi,Hyoungkyu Kim,Byoung-Kyong Min
出处
期刊:NeuroImage
[Elsevier]
日期:2022-11-01
卷期号:264: 119748-119748
标识
DOI:10.1016/j.neuroimage.2022.119748
摘要
Although conscious perception is a fundamental cognitive function, its neural correlates remain unclear. It remains debatable whether thalamocortical interactions play a decisive role in conscious perception. To clarify this, we used functional magnetic resonance imaging (fMRI) where flickering red and green visual cues could be perceived either as a non-fused colour or fused colour. Here we show significantly differentiated fMRI neurodynamics only in higher-order thalamocortical regions, compared with first-order thalamocortical regions. Anticorrelated neurodynamic behaviours were observed between the visual stream network and default-mode network. Its dynamic causal modelling consistently provided compelling evidence for the involvement of higher-order thalamocortical iterative integration during conscious perception of fused colour, while inhibitory control was revealed during the non-fusion condition. Taken together with our recent magnetoencephalography study, our fMRI findings corroborate a thalamocortical inhibitory model for consciousness, where both thalamic inhibitory regulation and integrative signal iterations across higher-order thalamocortical regions are essential for conscious perception.
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