The representation of objects in the human occipital and temporal cortex
The representation of objects in the human occipital and temporal cortex
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DOI：
10.1162/089892900564055
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发表时间：
2000-01-01
影响因子：
3.2
通讯作者：
Haxby, JV
中科院分区：
文献类型：
--
作者：
Ishai, A;Ungerleider, LG;Haxby, JV
最近，我们使用功能性磁共振成像（fMRI）确定了腹侧颞叶皮层的三个双侧区域，它们优先对面孔、房屋和椅子做出反应[Ishai，A.，翁格莱德湖G.，马丁，A.，Schouten，J.L.，& Haxby，J. V.（1999）.人类腹侧视觉通路中物体的分布式表征。美国国家科学院院刊，96，9379-9384]。在这里，我们报告的差异激活模式，类似于在腹侧颞叶皮层，在腹侧枕叶皮层的双边地区。我们还在枕叶背侧皮层和上级颞沟中发现了类别相关反应。此外，每一个类别都与其在广阔的皮层上的不同反应模式相关联，而不是激活离散的、隔离的区域。分布模式的反应是相似的任务（被动观看，延迟匹配）和演示格式（照片，线条画）。我们建议，在腹侧视觉通路，包括枕叶和颞叶区域的对象的表示，不限于小，高度选择性的补丁的皮层，而是一个分布式的表示对象的形式的信息。在这个分布式系统中，与非面部对象的表示相比，面部的表示似乎不那么广泛。
Recently, we identified, using fMRI, three bilateral regions in the ventral temporal cortex that responded preferentially to faces, houses, and chairs [Ishai, A., Ungerleider, L. G., Martin, A., Schouten, J. L., & Haxby, J. V. (1999). Distributed representation of objects in the human ventral visual pathway. Proceedings of the National Academy of Sciences, U.S.A., 96, 9379-9384]. Here, we report differential patterns of activation, similar to those seen in the ventral temporal cortex, in bilateral regions of the ventral occipital cortex. We also found category-related responses in the dorsal occipital cortex and in the superior temporal sulcus. Moreover, rather chan activating discrete, segregated areas, each category was associated with its own differential pattern of response across a broad expanse of cortex. The distributed patterns of response were similar across tasks (passive viewing, delayed matching) and presentation formats (photographs, line drawings). We propose that the representation of objects in the ventral visual pathway, including both occipital and temporal regions, is not restricted to small, highly selective patches of cortex but, instead, is a distributed representation of information about object form. Within this distributed system, the representation of faces appears to be less extensive as compared to the representations of nonface objects.