Selective attention allows us to prioritize the processing of relevant information and filter out irrelevant information. Human functional neuroimaging and lesion-based studies have highlighted the fronto-parietal dorsal attention network (DAN) as an important network in this process. In this study, we investigated the role of the DAN in distracter suppression by dynamically modifying the priority of visual information (target > high priority distracter > low priority distracter) based on features only. To this end, we collected fMRI data in 24 healthy subjects, who performed a feature-based variant of the sustained attention to response task. Participants had to select one or attend two stream(s) of overlapping digits that differed in color and respond to each digit in the task-relevant stream(s) except to a single non-target digit. Results showed higher DAN activity when a target was co-presented with a high versus low priority distracter. Furthermore, higher DAN activity was observed when selectively attending one (target + high/low priority distracter) versus simultaneously attending two (target + target) stream(s) of digits. In conclusion, our study highlights the contribution of the DAN in the feature-based suppression of task-irrelevant information.

中文翻译：

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注意力集中在基于特征的注意力分散抑制中的作用。

选择性注意使我们能够优先处理相关信息，并过滤掉不相关的信息。人体功能性神经影像学和基于病变的研究已经强调了额顶上背注意力网络（DAN）作为这一过程中的重要网络。在这项研究中，我们通过仅基于功能来动态修改视觉信息的优先级（目标>高优先级干扰项>低优先级干扰项）来研究DAN在干扰项抑制中的作用。为此，我们收集了24名健康受试者的fMRI数据，这些受试者进行了基于特征的持续关注反应任务。参与者必须选择一个或参加两个颜色不同的重叠数字流，并对与任务相关的流中的每个数字做出响应，除了单个非目标数字。当目标与高优先级干扰者与低优先级干扰者同时出现时，结果表明DAN活性更高。此外，当有选择地参加一个（目标+高/低优先级分散器）与同时参加两个（目标+目标）数字流时，观察到更高的DAN活性。总之，我们的研究突出了DAN在基于特征的任务无关信息抑制中的作用。