由模糊视觉刺激所诱发的事件相关电位被对面孔的表象过程所增强
其他题名ace Imagery Enhances Event-Related Potentials to Ambiguous Visual Stimuli
陆灵犀; 李量
2016
会议名称2016年第一届北京视觉科学会议
会议日期2016-07
会议地点北京
会议主办者中国科学院心理研究所
其他摘要

PURPOSE: The neural mechanism underlying face processing involves both bottom-up sensory processing of a face stimulus and top-down modulation. Face stimuli can elicit specific event-related potentials (ERPs), including N170, vertex positive potential (VPP), and P2, which are based on different bottom-up and top-down interactions at different processing levels. The specific top-down face processing without bottom-up contamination remains largely unknown. Particularly, it is unclear what neural responses manifest the top-down face-specific modulation while bottom-up inputs of physical features of faces are eliminated.
METHODS: This study was to examine the ERP components that are specifically modulated by the face imagery when random ambiguous visual stimuli are presented. Sixteen participants received two blocks of ambiguous stimuli, in which they were instructed to imagine either faces or houses upon looking at the ambiguous stimuli. The waveforms of VPP at the fronto-central sites, and N170 and P2 at the occipito-temporal sites were measured and analyzed.
RESULTS: Both VPP and P2 responses were enhanced by the face imagery compared to the non-face (house) imagery, and N170 disappeared when eliminating the physical face features.
CONCLUSIONS: Ambiguous-stimulus-induced VPP and P2, but not N170, can be modulated by the top-down face-imagery processing when bottom-up face-signal inputs are eliminated.

关键词Face Perception Face Imagery Event-Related Potentials
学科领域感知觉心理学
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收录类别其他
语种中文
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/20798
专题心理所主办学术会议_2016年第一届北京视觉科学会议_会议摘要
作者单位北京大学 心理学系及北京市行为与精神健康重点实验室
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GB/T 7714
陆灵犀,李量. 由模糊视觉刺激所诱发的事件相关电位被对面孔的表象过程所增强[C]. 见:2016年第一届北京视觉科学会议. 北京. 2016-07.http://vision.csp.escience.cn/dct/page/1.
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