Neural Correlates of Human Body Perception
Neural Correlates of Human Body Perception
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DOI：
10.1162/jocn.2009.21211
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发表时间：
2010-03-01
影响因子：
3.2
通讯作者：
Paus, Tomas
中科院分区：
文献类型：
--
作者：
Aleong, Rosanne;Paus, Tomas
这项研究的目的是通过对健康的年轻人进行功能磁共振成像来研究人体神经反应中潜在的性别差异。我们在区组设计实验中提出了人体，以识别大脑中对身体反应的区域，即纹状体外体区域(EBA)和梭状体区(FBA)。在同一组受试者中进行的另一项与事件相关的“适应”实验中，我们展示了四组不同体型和体型的人体。不同程度的身体变形被引入来评估适应释放所需的变形程度。在区组设计实验中对BOLD信号的分析表明，在EBA和FBA对人体的反应中，性别和大脑半球存在显著的交互作用。在EBA和FBA中，只有女性对右半球的身体表现出比左半球更大胆的反应。与男性相比，女性在右侧EBA中的大胆反应更高。在适应实验中，女性对EBA和FBA的右脑和左半球的反应也更大，但男性没有。这些发现特别新颖，因为它们解决了EBA和FBA对人体图像反应的偏侧化的潜在性别差异。虽然之前的研究已经发现右脑在身体知觉上有一定程度的优势，但我们的结果表明，这种功能偏侧化可能在男性和女性之间有所不同。
The objective of this study was to investigate potential sex differences in the neural response to human bodies using fMRI carried out in healthy young adults. We presented human bodies in a block-design experiment to identify body-responsive regions of the brain, namely, extrastriate body area (EBA) and fusiform body area (FBA). In a separate event-related "adaptation" experiment, carried out in the same group of subjects, we presented sets of four human bodies of varying body size and shape. Varying levels of body morphing were introduced to assess the degree of morphing required for adaptation release. Analysis of BOLD signal in the block-design experiment revealed significant Sex x Hemisphere interactions in the EBA and the FBA responses to human bodies. Only women showed greater BOLD response to bodies in the right hemisphere compared with the left hemisphere for both EBA and FBA. The BOLD response in right EBA was higher in women compared with men. In the adaptation experiment, greater right versus left hemisphere response for EBA and FBA was also identified among women but not men. These findings are particularly novel in that they address potential sex differences in the lateralization of EBA and FBA responses to human body images. Although previous studies have found some degree of right hemisphere dominance in body perception, our results suggest that such a functional lateralization may differ between men and women.