Response Profile of the Face-Sensitive N170 Component: A Rapid Adaptation Study
Response Profile of the Face-Sensitive N170 Component: A Rapid Adaptation Study
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DOI：
10.1093/cercor/bhp312
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发表时间：
2010-10-01
期刊：
影响因子：
3.7
通讯作者：
Nicholas, Susan
中科院分区：
文献类型：
--
作者：
Eimer, Martin;Kiss, Monika;Nicholas, Susan
为了研究面部选择性 N170 组件的响应曲线，采用了自适应程序，其中适配器和测试刺激快速连续出现。测试刺激来自 4 种不同的面部类别（直立、倒立、无眼面部和只有眼睛的图像）。相同的面部刺激，以及直立和倒立的房子，充当适配器。与房屋适配器相比，在面部适配器之前的所有类型的面部测试刺激中都发现了表明适应的 N170 振幅的强烈降低，这表明在一般水平上，N170 反映了完整面部和面部部分对面部选择性神经元的激活。对于适配器和测试刺激类别的不同组合，N170 适应效应的高度特异性模式表明眼睛选择性神经元和面部敏感神经元的额外独特贡献，这些神经元被调整为与 N170 成分的规范刺激方向的偏差。结果表明，N170 是由多个神经源在构形面部处理的早期和后期生成的，并且快速适应技术提供了分离这些源的强大工具。
To study the response profile of the face-selective N170 component, an adaptation procedure was employed where adaptor and test stimuli were presented in rapid succession. Test stimuli came from 4 different face categories (upright, inverted, and eyeless faces and eyes-only images). The same face stimuli, as well as upright and inverted houses, served as adaptors. Strong N170 amplitude reductions indicative of adaptation were found for all types of face test stimuli preceded by face adaptors relative to house adaptors, demonstrating that at a generic level, the N170 reflects the activation of face-selective neurons by full faces and by face parts. The highly specific pattern of N170 adaptation effects for different combinations of adaptor and test stimulus categories suggests additional distinct contributions of eye-selective neurons and of face-sensitive neurons that are tuned to deviations from canonical stimulus orientations to the N170 component. Results demonstrate that the N170 is generated by multiple neural sources at both early and later stages of configural face processing and that rapid adaptation techniques provide a powerful tool to dissociate these sources.