Neural Trade-Offs between Recognizing and Categorizing Own- and Other-Race Faces
Neural Trade-Offs between Recognizing and Categorizing Own- and Other-Race Faces
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识别和分类自己和其他种族面孔之间的神经权衡
DOI：
10.1093/cercor/bhu025
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发表时间：
2015-08-01
期刊：
影响因子：
3.7
通讯作者：
Lee, Kang
中科院分区：
文献类型：
--
作者：
Liu, Jiangang;Wang, Zhe;Lee, Kang
行为学研究表明，个体对自己和其他种族面孔的识别与种族分类之间存在权衡关系，这是人脸加工专业能力的重要行为标志。然而，人们对这种权衡背后的神经机制知之甚少。使用功能性磁共振成像（fMRI）方法，我们同时要求参与者识别和分类自己和其他种族的面孔，以检查这种权衡关系的神经相关性。我们发现，对于其他种族的面孔，梭状回面孔区（FFA）和枕部面孔区（OFA）对识别的反应大于对分类的反应，而对于本种族的面孔，这两个任务的反应是相等的。右侧颞上沟（STS）的反应与FFA和OFA相反。此外，识别增强了右侧FFA到右侧STS的功能连通性，而分类增强了右侧OFA到右侧STS的功能连通性。这两个偶联的调节作用呈负相关。研究结果表明，在核心人脸处理网络中，尽管识别和分类本种族和其他种族的面孔激活了相同的神经基底，但由于个体对本种族和其他种族面孔的不同处理能力，它们的激活和功能连接受到面孔类型和任务需求的调节，因此存在神经权衡。
Behavioral research has suggested a trade-off relationship between individual recognition and race categorization of own-and other-race faces, which is an important behavioral marker of face processing expertise. However, little is known about the neural mechanisms underlying this trade-off. Using functional magnetic resonance imaging (fMRI) methodology, we concurrently asked participants to recognize and categorize own-and other-race faces to examine the neural correlates of this trade-off relationship. We found that for other-race faces, the fusiform face area (FFA) and occipital face area (OFA) responded more to recognition than categorization, whereas for own-race faces, the responses were equal for the 2 tasks. The right superior temporal sulcus (STS) responses were the opposite to those of the FFA and OFA. Further, recognition enhanced the functional connectivity from the right FFA to the right STS, whereas categorization enhanced the functional connectivity from the right OFA to the right STS. The modulatory effects of these 2 couplings were negatively correlated. Our findings suggested that within the core face processing network, although recognizing and categorizing own-and other-race faces activated the same neural substrates, there existed neural trade-offs whereby their activations and functional connectivities were modulated by face race type and task demand due to one's differential processing expertise with own-and other-race faces.