Moradi Zargol, Mantini Dante, Yankouskaya Alla, Hewstone Miles, Humphreys Glyn W
Department of Experimental Psychology, University of Oxford, Ewert House Oxford, OX2 7SG, UK.
Department of Experimental Psychology, University of Oxford, Ewert House Oxford, OX2 7SG, UK; Department of Health Sciences and Technology, ETH, Zürich, Switzerland.
Behav Brain Res. 2017 Aug 14;332:126-135. doi: 10.1016/j.bbr.2017.04.045. Epub 2017 May 6.
Studies have shown that attending to salient group relevant information could increase the BOLD activity across distributed neural networks. However, it is unclear how attending to group relevant information changes the functional connectivity across these networks. We investigated this issue combining resting states and task-based fMRI experiment. The task involved football fans learning associations between arbitrary geometric shapes and the badges of in-group, the rival and the neutral football teams. Upon learning, participants viewed different badge/shape pairs and their task was to judge whether the viewed pair was a match or a mismatch. For whole brain analyses increased activity was found in the IFG, DLPFC, AI, fusiform gyrus, precuneus and pSTS (all in the left hemisphere) for the rival over the in-group mismatch. Further, the ROI analyses revealed larger beta-values for the rival badge in the left pSTS, left AI and the left IFG. However, larger beta-values were found in the left pSTS and the left IFG (but not AI) for the in-group shape. The intrinsic functional connectivity analyses revealed that compare to the pre-task, post task functional connectivity was decreased between the left DLPFC and the left AI. In contrast, it was increased between the left IFG and the left AI and this was correlated with the difference in RT for the rival vs. in-group team. Our findings suggest that attending to group relevant information differentially affects the strength of functional coupling in attention networks and this can be explained by the saliency of the group relevant information.
研究表明，关注与群体相关的显著信息可增加分布式神经网络中的脑血氧水平依赖（BOLD）活动。然而，尚不清楚关注与群体相关的信息如何改变这些网络间的功能连接。我们结合静息态和基于任务的功能磁共振成像（fMRI）实验对这一问题进行了研究。该任务要求足球迷学习任意几何形状与内群体、对手及中立足球队队徽之间的关联。学习后，参与者观看不同的队徽/形状配对，其任务是判断所观看的配对是匹配还是不匹配。在全脑分析中，发现与内群体不匹配相比，观看对手的队徽时，额下回（IFG）、背外侧前额叶皮质（DLPFC）、前岛叶（AI）、梭状回、楔前叶和颞上沟后部（pSTS，均在左半球）的活动增加。此外，感兴趣区（ROI）分析显示，左pSTS、左AI和左IFG中对手队徽的β值更大。然而，左pSTS和左IFG（而非AI）中内群体形状的β值更大。内在功能连接分析显示，与任务前相比，任务后左DLPFC与左AI之间的功能连接减少。相反，左IFG与左AI之间的功能连接增加，且这与对手队和内群体队反应时间的差异相关。我们的研究结果表明，关注与群体相关的信息会对注意力网络中功能耦合的强度产生不同影响，这可以用与群体相关信息的显著性来解释。
