Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing, China.
Brain Lang. 2012 Apr;121(1):70-5. doi: 10.1016/j.bandl.2012.01.002. Epub 2012 Feb 11.
Previous studies have found a late frontal-central audiovisual interaction during the time period about 150-220 ms post-stimulus. However, it is unclear to which process is this audiovisual interaction related: to processing of acoustical features or to classification of stimuli? To investigate this question, event-related potentials were recorded during a words-categorization task with stimuli presented in the auditory-visual modality. In the experiment, congruency of the visual and auditory stimuli was manipulated. Results showed that within the window of about 180-210 ms post-stimulus more positive values were elicited by category-congruent audiovisual stimuli than category-incongruent audiovisual stimuli. This indicates that the late frontal-central audiovisual interaction is related to audiovisual integration of semantic category information.
先前的研究发现，在刺激后约 150-220 毫秒的时间段内，存在一个晚期额-中央视听相互作用。然而，目前尚不清楚这种视听相互作用与哪个过程相关：是与声音特征的处理相关，还是与刺激的分类相关？为了研究这个问题，在一项使用听觉-视觉模态呈现刺激的单词分类任务中记录了事件相关电位。在实验中，对视觉和听觉刺激的一致性进行了操纵。结果表明，在刺激后约 180-210 毫秒的窗口内，与类别一致的视听刺激比与类别不一致的视听刺激引发更大的正波。这表明晚期额-中央视听相互作用与语义类别信息的视听整合有关。
