The relationship between repetition suppression and face perception
The relationship between repetition suppression and face perception
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DOI：
10.1007/s11682-016-9575-9
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发表时间：
2017-08-01
影响因子：
3.2
通讯作者：
Vidnyanszky, Zoltan
中科院分区：
文献类型：
--
作者：
Hermann, Petra;Grotheer, Mareike;Vidnyanszky, Zoltan
重复相同的面部刺激导致fMRI反应衰减（fMRI适应，fMRIa）在核心面部选择性枕颞视觉皮层网络，涉及双侧梭状面区（FFA）和枕面部区（OFA）。然而，迄今为止，在这些区域中观察到的fMRIa的功能相关性尚不清楚。因此，在这里，我们的目的是调查之间的关系fMRI a和面孔感知能力，通过测量在相同的人类参与者的重复引起的减少fMRI反应和身份识别性能扫描仪外的直立和倒置的脸刺激。在相关性分析中，行为和功能磁共振成像结果的倒置面孔被用作协变量，以控制整体的物体知觉能力和基本的视觉特征适应过程的个体差异，分别。结果显示，在核心面孔加工网络中，被试的身份辨别能力与fMRI a的强度之间存在显著的正相关关系，但在纹外体区（EBA）中不存在这种关系。此外，我们发现OFA和FFA之间以及OFA和EBA之间的fMRIa有很强的相关性，但FFA和EBA之间没有相关性。这些发现表明，有一个面孔选择性组件的重复引起的功能磁共振成像反应的核心面孔加工网络内，这反映了功能相关的适应过程中涉及的面孔身份知觉。
Repetition of identical face stimuli leads to fMRI response attenuation (fMRI adaptation, fMRIa) in the core face-selective occipito-temporal visual cortical network, involving the bilateral fusiform face area (FFA) and the occipital face area (OFA). However, the functional relevance of fMRIa observed in these regions is unclear as of today. Therefore, here we aimed at investigating the relationship between fMRIa and face perception ability by measuring in the same human participants both the repetition-induced reduction of fMRI responses and identity discrimination performance outside the scanner for upright and inverted face stimuli. In the correlation analysis, the behavioral and fMRI results for the inverted faces were used as covariates to control for the individual differences in overall object perception ability and basic visual feature adaptation processes, respectively. The results revealed a significant positive correlation between the participants' identity discrimination performance and the strength of fMRIa in the core face processing network, but not in the extrastriate body area (EBA). Furthermore, we found a strong correlation of the fMRIa between OFA and FFA and also between OFA and EBA, but not between FFA and EBA. These findings suggest that there is a face-selective component of the repetition-induced reduction of fMRI responses within the core face processing network, which reflects functionally relevant adaptation processes involved in face identity perception.