Evidence for feature binding in the superior parietal lobule
Evidence for feature binding in the superior parietal lobule
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DOI：
10.1016/j.neuroimage.2012.12.002
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发表时间：
2013-03-01
期刊：
影响因子：
5.7
通讯作者：
Pollmann, Stefan
中科院分区：
文献类型：
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作者：
Baumgartner, Florian;Hanke, Michael;Pollmann, Stefan
特征绑定的神经基质是一个古老的，但仍然没有完全解决的问题。虽然病人的研究表明，后顶叶皮层是必要的功能绑定，成像证据一直是不确定的，在过去。这些研究比较了视觉特征和连接搜索，以探讨特征连接的神经基础。然而，这些比较的一个共同问题是与搜索困难混淆。为了避免这种混淆，我们直接调查了本地化的表示功能（颜色和空间频率）和功能连接在一个单一的搜索任务，通过使用多变量模式分析在高场强（7 T）。在右上级顶叶，我们发现的证据表示的特征连接，不能解释的总和的个人特征表示，从而表明联合处理的颜色和空间频率。(C)2012 Elsevier Inc. All rights reserved.
The neural substrates of feature binding are an old, yet still not completely resolved problem. While patient studies suggest that posterior parietal cortex is necessary for feature binding, imaging evidence has been inconclusive in the past. These studies compared visual feature and conjunction search to investigate the neural substrate of feature conjunctions. However, a common problem of these comparisons was a confound with search difficulty. To circumvent this confound, we directly investigated the localized representation of features (color and spatial frequency) and feature conjunctions in a single search task by using multivariate pattern analysis at high field strength (7 T). In right superior parietal lobule, we found evidence for the representation of feature conjunctions that could not be explained by the summation of individual feature representations and thus indicates conjoined processing of color and spatial frequency. (C) 2012 Elsevier Inc. All rights reserved.