Decoding of faces and face components in face-sensitive human visual cortex.

Decoding of faces and face components in face-sensitive human visual cortex.
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DOI:
10.3389/fpsyg.2010.00028
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发表时间:
2010
影响因子:
3.8
通讯作者:
Wilson HR
Wilson HR
中科院分区:
心理学3区
文献类型:
--
作者:
Nichols DF;Betts LR;Wilson HR

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视觉神经科学领域的一个巨大挑战是了解人脑中面部的编码和表示方式。在这里,我们展示了来自功能磁共振成像(fMRI)的证据,用于对整个面部及其面部敏感的人类视觉皮层的各个组成部分进行空间分布处理。我们使用由留一扫描验证程序构建的多类线性模式分类器来区分由整个面部、单独的内部特征和单独的外部头部轮廓引起的大脑激活模式。此外,我们的结果表明,整个面部在梭状皮层(FFA)中的表现不成比例,而面部的组成部分在枕颞皮层(OFA)中的表现不成比例。因此,面部和面部组件可以通过FFA和OFA内的功能聚类来组织,但在OFA中对面部组件进行专门化,在FFA中对整个面部进行专门化。
A great challenge to the field of visual neuroscience is to understand how faces are encoded and represented within the human brain. Here we show evidence from functional magnetic resonance imaging (fMRI) for spatially distributed processing of the whole face and its components in face-sensitive human visual cortex. We used multi-class linear pattern classifiers constructed with a leave-one-scan-out verification procedure to discriminate brain activation patterns elicited by whole faces, the internal features alone, and the external head outline alone. Furthermore, our results suggest that whole faces are represented disproportionately in the fusiform cortex (FFA) whereas the building blocks of faces are represented disproportionately in occipitotemporal cortex (OFA). Faces and face components may therefore be organized with functional clustering within both the FFA and OFA, but with specialization for face components in the OFA and the whole face in the FFA.
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发表时间: 1994-03-01
影响因子: 2.5
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