Preparatory attention to visual features primarily relies on non-sensory representation.

Preparatory attention to visual features primarily relies on non-sensory representation.
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对视觉特征的预备注意主要依赖于非感觉表征。

DOI:
10.1038/s41598-022-26104-2
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发表时间:
2022-12-16
期刊:
影响因子:
4.6
通讯作者:
Liu, Taosheng
Liu, Taosheng
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gong, Mengyuan;Chen, Yilin;Liu, Taosheng

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行为相关信息的先验知识促进了刺激出现前的预备注意。一个关键的问题是,我们的大脑如何在准备过程中呈现所关注的信息。感觉模板假设认为,预备信号引起的神经活动模式,类似的感知出席刺激,而非感官,抽象的模板假设认为,预备信号反映了出席刺激的抽象。为了验证这些假设,我们使用功能磁共振成像和多变量分析来表征神经活动模式时,人类参与者准备出席一个功能,然后选择它从复合刺激。在功能磁共振成像实验中,使用基本的视觉功能(运动方向),我们观察到可靠的解码的准备活动在视觉和额顶叶区的功能。然而,虽然由基线任务的单个特征构建的神经模式概括到刺激选择期间的活动模式,但它们不能概括到准备期间的活动模式。因此,我们的研究结果表明,在注意准备过程中的神经信号主要是非感官的性质,可能反映了出席功能的抽象。这种表示可以提供有效和稳定的注意力引导。
Prior knowledge of behaviorally relevant information promotes preparatory attention before the appearance of stimuli. A key question is how our brain represents the attended information during preparation. A sensory template hypothesis assumes that preparatory signals evoke neural activity patterns that resembled the perception of the attended stimuli, whereas a non-sensory, abstract template hypothesis assumes that preparatory signals reflect the abstraction of attended stimuli. To test these hypotheses, we used fMRI and multivariate analysis to characterize neural activity patterns when human participants were prepared to attend a feature and then select it from a compound stimulus. In an fMRI experiment using basic visual feature (motion direction), we observed reliable decoding of the to-be-attended feature from the preparatory activity in both visual and frontoparietal areas. However, while the neural patterns constructed by a single feature from a baseline task generalized to the activity patterns during stimulus selection, they could not generalize to the activity patterns during preparation. Our findings thus suggest that neural signals during attentional preparation are predominantly non-sensory in nature that may reflect an abstraction of the attended feature. Such a representation could provide efficient and stable guidance of attention.
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