Contrast polarity and face recognition in the human fusiform gyrus
Contrast polarity and face recognition in the human fusiform gyrus
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DOI：
10.1038/9230
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发表时间：
1999-06-01
影响因子：
25
通讯作者：
Driver, J
中科院分区：
文献类型：
--
作者：
George, N;Dolan, RJ;Driver, J
功能成像揭示了人类梭状回中的面部反应视觉区域，但它们在识别熟悉个体中的作用仍然存在争议。反转图像的对比度极性尤其会损害人脸识别，尽管这会保留所有边缘和空间频率。在这里，当操纵对比极性时，检查了熟悉度和启动对面部处理的综合影响。我们的功能磁共振成像结果表明，梭状回的双侧后部区域对正对比极性的面部反应比负对比极性的面部反应更强烈。当给定的面部刺激被识别为知名个体时，前部右侧梭状区域就会被激活。
Functional imaging has revealed face-responsive visual areas in the human fusiform gyrus, but their role in recognizing familiar individuals remains controversial. Face recognition is particularly impaired by reversing contrast polarity of the image, even though this preserves all edges and spatial frequencies. Here, combined influences of familiarity and priming on face processing were examined as contrast polarity was manipulated. Our fMRI results show that bilateral posterior areas in fusiform gyrus responded more strongly for faces with positive than with negative contrast polarity. An anterior, right-lateralized fusiform region is activated when a given face stimulus becomes recognizable as a well-known individual.