The right temporo-parietal junction contributes to visual feature binding
The right temporo-parietal junction contributes to visual feature binding
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DOI：
10.1016/j.neuroimage.2014.07.021
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发表时间：
2014-11-01
期刊：
影响因子：
5.7
通讯作者：
Hanke, Michael
中科院分区：
文献类型：
--
作者：
Pollmann, Stefan;Zinke, Wolf;Hanke, Michael
利用功能磁共振成像（fMRI）研究了色彩与空间频率联合处理的神经基础。一个多变量分类算法被训练来区分单独的颜色或空间频率差异，或在两个特征维度的联合差异。所有的显示都在一个单一的搜索任务中呈现，避免了在以往的研究中出现的连接特征处理和搜索困难之间的混淆。基于对患者的研究，我们预期右侧颞顶交界处（TPJ）参与连接特征处理。这一假设得到了证实，在该区域中，只有连接的颜色和空间频率差异，而不是孤立的特征差异可以被分类到机会水平以上。此外，我们可以证明，与右侧TPJ内孤立的颜色或空间频率差异的分类精度相比，两个特征维度差异的分类精度是超加性的。这些数据为右TPJ处理特征连词提供了证据，这里是颜色和空间频率。(C) 2014爱思唯尔公司版权所有。
We investigated the neural basis of conjoined processing of color and spatial frequency with functional magnetic resonance imaging (fMRI). A multivariate classification algorithm was trained to differentiate between either isolated color or spatial frequency differences, or between conjoint differences in both feature dimensions. All displays were presented in a singleton search task, avoiding confounds between conjunctive feature processing and search difficulty that arose in previous studies contrasting single feature and conjunction search tasks. Based on patient studies, we expected the right temporo-parietal junction (TPJ) to be involved in conjunctive feature processing. This hypothesis was confirmed in that only conjoined color and spatial frequency differences, but not isolated feature differences could be classified above chance level in this area. Furthermore, we could show that the accuracy of a classification of differences in both feature dimensions was superadditive compared to the classification accuracies of isolated color or spatial frequency differences within the right TPJ. These data provide evidence for the processing of feature conjunctions, here color and spatial frequency, in the right TPJ. (C) 2014 Elsevier Inc. All rights reserved.