Investigation of noun-verb dissociation based on EEG source reconstruction
Investigation of noun-verb dissociation based on EEG source reconstruction
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DOI：
10.1109/apsipa.2016.7820817
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
Bin Zhao;J. Dang;Gaoyan Zhang
中科院分区：
文献类型：
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作者：
Bin Zhao;J. Dang;Gaoyan Zhang
为了澄清语法类别或语义是否是大脑地形中名词-动词分离的根本决定因素，这项研究记录了 22 名受试者在听听觉时 (i) 明确名词 (UN)、(ii) 明确动词 (UV)、(iv) 名词偏向模糊词 (AN) 和 (v) 时头皮发出的 128 通道脑电图 (EEG) 信号。动词偏向的歧义词 (AV)。然后，将具有标准化低分辨率电磁断层扫描约束的电流密度源重建算法应用于脑电图信号，以揭示文字处理过程中的大脑动态。在我们的结果中，名词-动词分离出现在 150-250 毫秒和 380-450 毫秒的时期，在此期间，在 UN-UV 和 AN-AV 对比中观察到视觉枕叶皮层和运动额叶皮层的激活差异。结果表明语义差异可能导致名词与动词的分离。
To clarify whether grammatical category or semantic meaning is the underlying determinant of noun-verb dissociation in the brain topography, this study recorded 128-channel electroencephalographic (EEG) signals from the scalps of 22 subjects when they listened to auditory (i) unambiguous nouns (UN), (ii) unambiguous verbs (UV), (iv) noun-biased ambiguous words (AN) and (v) verb-biased ambiguous words (AV). Then the current density source reconstruction algorithm with a standardized low-resolution electromagnetic tomography constraint was applied to the EEG signals to uncover the brain dynamics during the word processing. In our results, the noun-verb dissociation appeared in the periods of 150–250 ms and 380–450 ms, during which activation differences in the visual occipital cortex and motor frontal cortex were observed in both UN-UV and AN-AV contrasts. The results suggest that semantic differences might lead to the noun-verb dissociation.