Bodies are Represented as Wholes Rather Than Their Sum of Parts in the Occipital-Temporal Cortex
Bodies are Represented as Wholes Rather Than Their Sum of Parts in the Occipital-Temporal Cortex
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DOI：
10.1093/cercor/bhu205
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发表时间：
2016-02-01
期刊：
影响因子：
3.7
通讯作者：
Yovel, Galit
中科院分区：
文献类型：
--
作者：
Brandman, Talia;Yovel, Galit
行为学研究表明，身体是以整体而不是以部分为基础的方式来表现的。然而，神经对身体刺激的选择性被发现为整个身体和身体部位。因此，我们无法确定身体的神经表征是基于骨骼还是基于部分。我们使用功能性磁共振成像测试的作用，一阶配置的身体表征在人类枕颞叶皮层的反应，以一个整体与其部分的总和进行比较。结果表明，身体选择性领域，无论是定义为无头机构或身体部位的选择性，首选整个机构超过其部分和成功解码的身体配置。这种视觉表征是特定于身体刺激的，而不是面部刺激。相比之下，一般对象区域对整体和部分没有表现出偏好，并且解码了身体和面部的配置。最后，尽管反转对面部表征的影响是面部选择机制所特有的，但身体反转的影响并不是身体选择机制所特有的。我们的结论是，身体部位的神经表征是加强了他们的安排成一个完整的身体，从而展示了一个核心作用的一阶配置的神经表征机构在其类别选择领域。
Behavioral studies suggested that bodies are represented as wholes rather than in a part-based manner. However, neural selectivity for body stimuli is found for both whole bodies and body parts. It is therefore undetermined whether the neural representation of bodies is configural or part-based. We used functional MRI to test the role of first-order configuration on body representation in the human occipital-temporal cortex by comparing the response to a whole body versus the sum of its parts. Results show that body-selective areas, whether defined by selectivity to headless bodies or body parts, preferred whole bodies over their sum of parts and successfully decoded body configuration. This configural representation was specific to body stimuli and not found for faces. In contrast, general object areas showed no preference for wholes over parts and decoded the configuration of both bodies and faces. Finally, whereas effects of inversion on configural face representation were specific to face-selective mechanisms, effects of body inversion were not unique to body-selective mechanisms. We conclude that the neural representation of body parts is strengthened by their arrangement into an intact body, thereby demonstrating a central role of first-order configuration in the neural representation of bodies in their category-selective areas.