Early visual and auditory processing rely on modality-specific attentional resources
Early visual and auditory processing rely on modality-specific attentional resources
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DOI：
10.1016/j.neuroimage.2012.12.046
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发表时间：
2013-04-15
期刊：
影响因子：
5.7
通讯作者：
Mueller, Matthias M.
中科院分区：
文献类型：
--
作者：
Keitel, Christian;Maess, Burkhard;Mueller, Matthias M.
许多日常情况需要专注于视觉或听觉信息，而忽略其他模态。以前的研究结果表明，注意力机制之间的感官形式和管理这样的状态。到目前为止，证据是模棱两可的，是否这种Intermodar的注意力依赖于分配的资源，无论是共同的或特定的感官形式。我们提供了新的见解，调查的后果，从同时（“双峰”）注意到视觉和听觉单峰选择性注意。同时提出的视觉和听觉刺激流的频率标记，以引起稳态反应（SSR）同时记录在脑电图和脑磁图（EEG/MEG）。转移后，SSR的振幅下降，对应于无人看管的感觉流表示减少处理。我们没有观察到SSR的振幅增加对应于出席的感觉流。这些发现与共同资源账户不一致。视觉和听觉之间的注意力资源的重新分配将导致同时处理增益在出席的感觉方式和减少在无人看管的感觉方式。我们的研究结果有利于一个特定于模态的资源帐户，它允许独立调制的早期皮层处理在每个感觉模态。(C)2012 Elsevier Inc. All rights reserved.
Many everyday situations require focusing on visual or auditory information while ignoring the other modality. Previous findings suggest an attentional mechanism that operates between sensory modalities and governs such states. To date, evidence is equivocal as to whether this Intermodar attention relies on a distribution of resources either common or specific to sensory modalities. We provide new insights by investigating consequences of a shift from simultaneous ('bimodal') attention to vision and audition to unimodal selective attention. Concurrently presented visual and auditory stimulus streams were frequency-tagged to elicit steady-state responses (SSRs) recorded simultaneously in electro- and magnetoencephalograms (EEG/MEG). After the shift, decreased amplitudes of the SSR corresponding to the unattended sensory stream indicated reduced processing. We did not observe an amplitude increase of the SSR corresponding to the attended sensory stream. These findings are incompatible with a common-resources account. A redistribution of attentional resources between vision and audition would result in simultaneous processing gain in the attended sensory modality and reduction in the unattended sensory modality. Our results favor a modality-specific-resources account, which allows for independent modulation of early cortical processing in each sensory modality. (C) 2012 Elsevier Inc. All rights reserved.