Using spatial frequency scales for processing face features and face configuration: An ERP analysis
Using spatial frequency scales for processing face features and face configuration: An ERP analysis
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DOI：
10.1016/j.brainres.2007.11.071
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发表时间：
2008-02-15
期刊：
影响因子：
2.9
通讯作者：
Bentin, Shlomo
中科院分区：
文献类型：
--
作者：
Fleuaris, Anastasia V.;Robertson, Lynn C.;Bentin, Shlomo
在目前的研究中，我们考察了空间滤波对N170效应的影响，N170效应是一种与人脸检测相关的相对较早的面部选择性ERP差异。我们使用便于特征分析或阻碍构型分析的空间过滤刺激来比较N170效应的调制。通过孤立地呈现内部面部组件来增强它们的显着性。构型加工通过脸部倒置进行操作。直立面孔和孤立的内部成分所引起的N170效应在低、高空间频率尺度上是相似的。相反，只有在宽带和低空间频率刺激下才能观察到倒置效应(相对于直立面孔，倒置面孔的N170波幅增强)。这些发现表明，N170效应既受低空间频率通道的影响，也受高空间频率通道的影响。此外，他们指出，不同的结构操作(孤立特征和人脸反转)以不同的方式影响人脸检测，这与不同类型的结构编码的不同处理机制一致。(C)2007 Elsevier B.V.保留所有权利。
In the present study we examined the influence of spatial filtering on the N170-effect, a relatively early face-selective ERP difference associated with face detection. We compared modulation of the N170-effect using spatially filtered stimuli that either facilitated feature analysis or impeded configural analysis. The salience of inner face components was enhanced by presenting them in isolation. Configural processing was manipulated by face inversion. The N170-effects elicited by upright faces and isolated inner components were similar across low- and high-spatial frequency scales. In contrast, the inversion effect (enhanced N170 amplitude for inverted compared with upright faces) was only observed with broadband and low-spatial frequency stimuli. These findings demonstrate that the N170-effect can be influenced by both low- and high-spatial frequency channels. Moreover, they indicate that different configural manipulations (isolated features vs. face inversion) affect face detection in distinct ways, consistent with separate processing mechanisms for different types of configural encoding. (c) 2007 Elsevier B.V. All rights reserved.