Spatial coding and invariance in object-selective cortex
Spatial coding and invariance in object-selective cortex
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DOI：
10.1016/j.cortex.2009.08.015
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发表时间：
2011-01-01
期刊：
影响因子：
3.6
通讯作者：
Verstraten, Frans A. J.
中科院分区：
文献类型：
--
作者：
Carlson, Thomas;Hogendoorn, Hinze;Verstraten, Frans A. J.
本研究探讨了物体选择皮层对空间位置的编码。利用功能磁共振成像（fMRI）和模式分类分析，我们发现目标选择皮层的三个区域，即外侧枕叶皮层区（LO）、梭状面区（FFA）和海马旁位置区（PPA），对目标的空间位置进行了稳健的编码。分析进一步揭示了几种各向异性（例如，水平/垂直不对称性）在这些区域中的视觉空间的表示中。最后，我们表明，在这些领域的信息表示允许对象类别信息提取在不同的位置在视野中，一个发现，这表明一个潜在的神经解决方案，以实现翻译不变性。(C)2009 Elsevier Srl. All rights reserved.
The present study examined the coding of spatial position in object selective cortex. Using functional magnetic resonance imaging (fMRI) and pattern classification analysis, we find that three areas in object selective cortex, the lateral occipital cortex area (LO), the fusiform face area (FFA), and the parahippocampal place area (PPA), robustly code the spatial position of objects. The analysis further revealed several anisotropies (e.g., horizontal/vertical asymmetry) in the representation of visual space in these areas. Finally, we show that the representation of information in these areas permits object category information to be extracted across varying locations in the visual field; a finding that suggests a potential neural solution to accomplishing translation invariance. (C) 2009 Elsevier Srl. All rights reserved.