Behavioral and electrophysiological correlates of intact and scrambled body perception
Behavioral and electrophysiological correlates of intact and scrambled body perception
复制标题
DOI：
10.1016/j.clinph.2012.09.030
复制
发表时间：
2013-04-01
影响因子：
4.7
通讯作者：
Suchan, Boris
中科院分区：
文献类型：
--
作者：
Bauser, Denise A. Soria;Suchan, Boris
目的：完整的面部和身体引出两个显著的电生理成分（P100和N170）。N170被认为与面部和身体的结构编码和图形处理有关。本研究的目的是调查是否完整的面孔和身体，以及混乱的面孔和身体引起相同的组成部分。这将意味着，类似的面孔，机构编码作为一个整体。方法：我们使用了一个匹配的样本任务和两个操作验证作为一个评估在以前的研究中的视觉处理：反转效应和完整与混乱的刺激presentation.Results：对于这两个类别，性能是更好的完整相比，混乱的刺激。此外，刺激扭曲似乎取消了身体，但不是脸反转效果。在电生理水平上，我们发现增强N170振幅完整的脸和身体相比，扰乱刺激。相反的模式在P100的时间窗口中进行。此外，对于N170，我们观察到一个完整的，但不是混乱的bodies.Conclusions：一阶关系信息的感知机构是重要的，并可能在N170的时间窗口处理的反转效果。破坏这些信息与反转效应相互作用。意义：目前的数据表明，面孔和身体可能是由不同的机制处理的实验操作影响的面孔以不同的方式比身体。(C)2012年国际临床神经生理学联合会。由Elsevier爱尔兰有限公司出版。保留所有权利。
Objective: Intact faces and bodies elicit two prominent electrophysiological components (P100 and N170). The N170 is thought to be related to the structural encoding and configural processing of faces and bodies. The aim of the present study was to investigate whether intact faces and bodies as well as scrambled faces and bodies elicit the same component. This would imply that similar as faces, bodies are encoded as a whole.Methods: We used a matching to sample task and two manipulations validated as an assessment of configural processing in previous studies: the inversion effect and intact versus scrambled stimulus presentation.Results: For both categories, performance was better for intact compared to scrambled stimuli. Additionally, stimulus distortion seems to abolish the body but not the face inversion effect. On the electrophysiological level, we found enhanced N170 amplitudes for intact faces and bodies compared to scrambled stimuli. The opposite pattern engaged in the time-window of the P100. Furthermore, for the N170 we observed an inversion effect for intact but not scrambled bodies.Conclusions: First-order relational information are important for the perception of bodies and might be processed in the N170 time-window. Disrupting this information interacts with the inversion effect.Significance: The current data suggest that faces and bodies might be processed by distinct mechanisms as the experimental manipulation affected faces in a different way than bodies. (C) 2012 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.