fMRI evidence for both generalized and specialized components of attentional control.
fMRI evidence for both generalized and specialized components of attentional control.
复制标题
注意力控制的广义和专门成分的功能磁共振成像证据。
DOI：
10.1016/j.brainres.2007.07.097
复制
发表时间：
2007
期刊：
影响因子：
2.9
通讯作者：
Mangun,GR
中科院分区：
文献类型：
--
作者：
Slagter,HA;Giesbrecht,B;Kok,A;Weissman,DH;Kenemans,JL;Woldorff,MG;Mangun,GR
选择性注意研究的一个核心问题是，自上而下的注意控制机制对于要注意的信息类型是通用的还是专门的。目前的研究使用自愿定向任务来检验这个问题，该任务提示观察者注意两个位置之一或两种颜色之一。位置（空间）和颜色（非空间）条件要么在同一试验块中随机混合，要么在单独的试验块中随机混合。功能性磁共振成像显示，将注意力集中到某个位置或某种颜色会激活背侧额叶和顶叶重叠区域的网络，该网络先前与注意力控制有关。观察到的重叠模式不受位置和颜色条件的混合与阻塞呈现的影响。尽管额叶-顶叶网络的某些部分对位置线索的反应比对颜色线索的反应更活跃，但二次分析还表明，无论线索维度（位置或颜色）如何，内侧背侧额叶和顶叶皮层都专门参与转移视觉注意力。总之，目前的结果支持这样的结论：注意力控制是广义网络的组合，该广义网络与额顶叶网络的子区域协同工作，这些子区域高度专业化，用于根据要注意的信息的内容引导注意力。
A central question in the study of selective attention is whether top–down attentional control mechanisms are generalized or specialized for the type of information that is to be attended. The current study examined this question using a voluntary orienting task that cued observers to attend to either one of two locations or to one of two colors. Location (spatial) and color (nonspatial) conditions were presented either randomly intermixed within the same block of trials or in separate blocks. Functional magnetic resonance imaging revealed that directing attention to a location or to a color activated a network of overlapping dorsal frontal and parietal areas, previously implicated in attentional control. The pattern of observed overlap was not affected by the intermixed versus blocked presentation of location and color conditions. Although portions of the frontal–parietal network were more active in response to location cues than to color cues, a secondary analysis also revealed that medial dorsal frontal and parietal cortex were specifically engaged in shifting visual attention regardless of the cued dimension (location or color). Together, the present results support the conclusion that attentional control is the combination of a generalized network that works in concert with subregions of the frontoparietal network that are highly specialized for directing attention based on the content of the to-be-attended information.