Distributed representation of objects in the human ventral visual pathway
Distributed representation of objects in the human ventral visual pathway
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DOI：
10.1073/pnas.96.16.9379
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发表时间：
1999-08-03
影响因子：
11.1
通讯作者：
Haxby, JV
中科院分区：
文献类型：
--
作者：
Ishai, A;Ungerleider, LG;Haxby, JV
对人类的脑成像和电生理记录研究已经报道了后腹侧颞叶皮层中的离散皮层区域，这些区域优先对面孔、建筑物和字母做出反应。这些研究结果表明，一个特定类别的解剖隔离模块组织的对象视觉通路。在这里，我们提出的数据从功能性MRI研究中，我们发现三个不同的区域的腹侧颞叶皮层，优先响应的面孔和两类其他对象，即房屋和椅子，并有一个高度一致的拓扑结构安排。虽然这些数据可以被解释为单独模块的证据，但我们发现，每个类别也会在对其他刺激反应最大的区域引起显着反应。此外，每个类别都与腹侧颞叶皮质的反应差异模式相关。这些结果表明，物体的表征并不局限于对该物体反应最大的区域，而是分布在更广泛的皮层中。我们建议，腹侧视觉通路的功能架构是不是一个马赛克的类别特定的模块，而是一个连续的表示对象的形式，具有高度一致和有序的拓扑结构安排的信息。
Brain imaging and electrophysiological recording studies in humans have reported discrete cortical regions in posterior ventral temporal cortex that respond preferentially to faces, buildings, and letters. These findings suggest a category-specific anatomically segregated modular organization of the object vision pathway. Here we present data from a functional MRI study in which we found three distinct regions of ventral temporal cortex that responded preferentially to faces and two categories of other objects, namely houses and chairs, and had a highly consistent topological arrangement. Although the data could be interpreted as evidence for separate modules, we found that each category also evoked significant responses in the regions that responded maximally to other stimuli. Moreover, each category was associated with its oven differential pattern of response across ventral temporal cortex. These results indicate that the representation of an object is not restricted to a region that responds maximally to that object, but rather is distributed across a broader expanse of cortex. We propose that the functional architecture of the ventral visual pathway is not a mosaic of category-specific modules but instead is a continuous representation of information about object form that has a highly consistent and orderly topological arrangement.