Propagation of Information Along the Cortical Hierarchy as a Function of Attention While Reading and Listening to Stories
Propagation of Information Along the Cortical Hierarchy as a Function of Attention While Reading and Listening to Stories
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DOI：
10.1093/cercor/bhy282
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发表时间：
2019-10-01
期刊：
影响因子：
3.7
通讯作者：
Hasson, Uri
中科院分区：
文献类型：
--
作者：
Regev, Mor;Simony, Erez;Hasson, Uri
在大脑相对固定的拓扑结构中，注意力是如何根据任务将信息从感觉区域传递到高阶区域的？在这项研究中，参与者同时呈现两个不相关的故事-一个是口语，一个是书面的-并要求参加一个而忽略另一个。我们使用功能磁共振成像和一种新的受试者间相关性分析来跟踪信息的传播沿着处理层次作为任务的函数。处理无人看管的口头（书面）信息仅限于听觉（视觉）皮层。与此相反，注意到口头（书面）故事增强了感觉区域的刺激选择性反应，并允许它传播到更高级的区域。令人惊讶的是，我们发现，特定的故事口语（书面）的反应出席的故事也达到了次要的视觉（听觉）区域的无人值守的感觉模态。这些结果表明，注意力如何增强对注意输入的处理，并使其在大脑区域之间传播。
How does attention route information from sensory to high-order areas as a function of task, within the relatively fixed topology of the brain? In this study, participants were simultaneously presented with 2 unrelated stories-one spoken and one written-and asked to attend one while ignoring the other. We used fMRI and a novel intersubject correlation analysis to track the spread of information along the processing hierarchy as a function of task. Processing the unattended spoken (written) information was confined to auditory (visual) cortices. In contrast, attending to the spoken (written) story enhanced the stimulus-selective responses in sensory regions and allowed it to spread into higher-order areas. Surprisingly, we found that the story-specific spoken (written) responses for the attended story also reached secondary visual (auditory) regions of the unattended sensory modality. These results demonstrate how attention enhances the processing of attended input and allows it to propagate across brain areas.