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首页> 外文期刊>Neuron >Oscillatory synchronization in large-scale cortical networks predicts perception.
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Oscillatory synchronization in large-scale cortical networks predicts perception.

机译:大规模皮层网络中的振荡同步可预测感知。

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摘要

Normal brain function requires the dynamic interaction of functionally specialized but widely distributed cortical regions. Long-range synchronization of oscillatory signals has been suggested to mediate these interactions within large-scale cortical networks, but direct evidence is sparse. Here we show that oscillatory synchronization is organized in such large-scale networks. We implemented an analysis approach that allows for imaging synchronized cortical networks and applied this technique to EEG recordings in humans. We identified two networks: beta-band synchronization (~20 Hz) in a fronto-parieto-occipital network and gamma-band synchronization (~80 Hz) in a centro-temporal network. Strong perceptual correlates support their functional relevance: the strength of synchronization within these networks predicted the subjects' perception of an ambiguous audiovisual stimulus as well as the integration of auditory and visual information. Our results provide evidence that oscillatory neuronal synchronization mediates neuronal communication within frequency-specific, large-scale cortical networks.
机译:正常的大脑功能需要功能专门但分布广泛的皮质区域的动态相互作用。已经提出,振荡信号的远程同步可在大规模皮层网络内介导这些相互作用,但直接证据很少。在这里,我们证明了在这样的大型网络中组织了振荡同步。我们实施了一种分析方法,可以对同步的皮质网络进行成像,并将此技术应用于人类的EEG记录。我们确定了两个网络:额顶枕网络中的β波段同步(〜20 Hz)和中央颞叶网络中的gamma波段同步(〜80 Hz)。强大的感官关联支持它们的功能相关性:这些网络中的同步强度预测了受试者对模棱两可的视听刺激以及听觉和视觉信息的整合的感知。我们的结果提供了证据,振荡神经元同步介导特定频率的大规模皮层网络内的神经元通信。

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