How distributed is visual category information in human occipito-temporal cortex? An fMRI study
How distributed is visual category information in human occipito-temporal cortex? An fMRI study
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DOI：
10.1016/s0896-6273(02)00877-2
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发表时间：
2002-09-12
期刊：
影响因子：
16.2
通讯作者：
Kanwisher, N
中科院分区：
文献类型：
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作者：
Spiridon, M;Kanwisher, N
利用功能磁共振成像（fMRI）研究了物体类别信息在腹侧视觉通路中的分布。扩展Haxby等人（2001）的发现，我们发现，刺激类别可以通过它们在整个通路上引发的激活模式来区分，即使一个类别中的刺激在观点、范例或图像格式上有所不同。然而，腹侧视觉通路内的区域既不能互换也不能等电位。尽管FFA和PPA能够很好地区分偏好刺激和非偏好刺激（例如，分别是脸-瓶子和房子-瓶子），但我们发现，这两个区域都不能单独准确区分成对的非偏好刺激（例如，瓶子-鞋子）。这些发现表明，腹侧视觉通路不是同质的，但包含一些区域（包括FFA和PPA），这些区域主要参与分析单一类型的刺激。
We used fMRI to study the distribution of object category information in the ventral visual pathway. Extending the findings of Haxby et al. (2001), we find that categories of stimuli can be distinguished by the pattern of activation they elicit across this entire pathway, even when the stimuli within a category differ in viewpoint, exemplar, or image format. However, regions within the ventral visual pathway are neither interchangeable nor equipotential. Although the FFA and PPA permit excellent discrimination between preferred versus nonpreferred stimuli (e.g., faces-bottles and houses-bottles, respectively), we find that neither region alone permits accurate discrimination between pairs of nonpreferred stimuli (e.g., bottles-shoes). These findings indicate that the ventral visual pathway is not homogeneous, but contains some regions (including FFA and PPA) that are primarily involved in the analysis of a single class of stimulus.