【摘要】 本研究采用事件相关电位调查了镜像识别的认知神经机制。有12名西南大学在校学生参与本研究中,任务是判断所呈现的汉字是否是动物字。结果显示,在200-250ms左右镜像汉字诱发了明显N2成分,并激活了大脑后部的大部分区域。N2在一定程度上反映了词形加工。镜像汉字的识别可能伴随着空间转换机制的参与,这一机制的参与弥补了词形完整性的缺失。更多还原

【Abstract】 In use of ERP technique,the present study investigated neural correlates underlying recognition of mirror Chinese characters.Twelve native Chinese undergraduates from Southwest University participated in the experiment during which they were instructed to make an animal/non animal distinction no matter how characters presented.The behavioral data showed that mirror-reversed words were more difficult to be identified than normal words,with RTs delayed for mirror-reversed words than for normal words.Moreover,a clear N2 component,whose maximal activity occurred at 200-250ms interval(N2) and had a posterior distribution,was more negative for mirror-reversed words than for normal words.However,there were no latency differences between normal and mirror-reversed words.The occipital N2 might be closely related to abstract word form representation.Larger N2 amplitude in response to mirror-reversed Chinese words is interpreted as reflecting visuospatial transformation in order to compensate for impaired word form analysis.The result of no N2 latency delay indicated that word form analysis and visuospatial transformation might be processed in parallel.更多还原