The Microstructure of Attentional Control in the Dorsal Attention Network.

The Microstructure of Attentional Control in the Dorsal Attention Network.
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DOI:
10.1162/jocn_a_01710
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发表时间:
2021-05-01
影响因子:
3.2
通讯作者:
Ding M
Ding M
中科院分区:
医学3区
文献类型:
--
作者:
Rajan A;Meyyappan S;Liu Y;Samuel IBH;Nandi B;Mangun GR;Ding M

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注意的自上而下控制涉及主要在额叶和顶叶皮层的背侧注意网络(DAN)中产生的命令信号,并传播到感觉皮层,以根据其行为相关性选择性地处理传入的刺激。与此观点相一致,DAN在对相关事件和物体的准备(预期)注意期间是活跃的,在视觉中,这些事件和物体可以由不同的刺激属性定义,包括它们的空间位置,颜色,运动或形式。这个网络是如何组织的,以支持不同形式的准备注意不同的刺激属性仍然不清楚。我们建议,在DAN中,存在特定的功能微结构(活动模式),用于根据要注意的特定信息来控制注意力。为了测试这一点,我们对比预备注意刺激位置(空间注意力)和刺激颜色(功能注意力),并使用多体素模式分析,以表征相应的模式内的DAN活动。我们观察到不同的多体素模式的BOLD激活的DAN内的空间注意(注意左与右)和功能的注意(注意红色与绿色)的控制。空间和特征注意控制的这些活动模式在DAN内彼此重叠有限。因此,我们的研究结果支持了一个模型,在该模型中,DAN具有不同的功能微结构,用于自上而下控制视觉注意力的独特形式。
The top–down control of attention involves command signals arising chiefly in the dorsal attention network (DAN) in frontal and parietal cortex and propagating to sensory cortex to enable the selective processing of incoming stimuli based on their behavioral relevance. Consistent with this view, the DAN is active during preparatory (anticipatory) attention for relevant events and objects, which, in vision, may be defined by different stimulus attributes including their spatial location, color, motion, or form. How this network is organized to support different forms of preparatory attention to different stimulus attributes remains unclear. We propose that, within the DAN, there exist functional microstructures (patterns of activity) specific for controlling attention based on the specific information to be attended. To test this, we contrasted preparatory attention to stimulus location (spatial attention) and to stimulus color (feature attention), and used multivoxel pattern analysis to characterize the corresponding patterns of activity within the DAN. We observed different multivoxel patterns of BOLD activation within the DAN for the control of spatial attention (attending left vs. right) and feature attention (attending red vs. green). These patterns of activity for spatial and feature attentional control showed limited overlap with each other within the DAN. Our findings thus support a model in which the DAN has different functional microstructures for distinctive forms of top–down control of visual attention.
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