Electroencephalographic activity over temporal brain areas during phonological encoding in picture naming
Electroencephalographic activity over temporal brain areas during phonological encoding in picture naming
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DOI：
10.1016/s1388-2457(00)00441-7
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发表时间：
2000-11-01
影响因子：
4.7
通讯作者：
Cohen, R
中科院分区：
文献类型：
--
作者：
Eulitz, C;Hauk, O;Cohen, R
目的：本研究探讨了在图片命名过程中语音编码的脑电图（EEG）相关，特别强调这些EEG相关的半球不对称性。我们还研究了一组小的刺激是否足以研究语音编码，以及产生的信息的复杂性在多大程度上影响了EEG responses.Methods：事件相关的脑电活动期间的内隐和外显生产的名称和名词性短语来自16个变种从3个不同的图片进行了比较，在被动观看相同的图片。地形和源分析的差异脑电图活动（命名与被动观看）表明，N1和P2组件的视觉诱发电位导致从相同的大脑区域，但激活更强的命名过程中相比，被动观看。相比之下，从275到400毫秒的差异脑电图活动表明，在命名过程中，无论是显性命名还是隐性命名，中颞区和后颞区的左半球激活都比右半球激活更明显。结果表明，韦尼克区参与语音产生过程中的信息的语音编码，这甚至可以用一小组图片和大量重复来获得。(C)2000爱思唯尔科学爱尔兰有限公司保留所有权利。
Objectives: The present study examined electroencephalographic (EEG) correlates of phonological encoding during picture naming with special emphasis on hemispheric asymmetries of these EEG correlates. We also examined whether a small set of stimuli was sufficient to study the phonological encoding, and to what extent the complexity of the produced message affects the EEG responses.Methods: Event-related electrical brain activity during the covert and overt production of names and nominal phrases derived from 16 Variants from 3 different pictures was compared with that during passive viewing of the same pictures.Results: Topographical and source analyses of the differential EEG activity (naming versus passive viewing) indicated that the N1 and P2 components of the visual evoked potential resulted from the same brain areas, but were activated stronger during naming as compared to passive viewing. In contrast, the differential EEG activity from 275 to 400 ms suggested the involvement of additional brain areas during naming with more pronounced left- than right-hemispheric activation in middle and posterior temporal regions for both overt and covert naming.Conclusions: Results suggest the involvement of Wernicke's area in the phonological encoding of a message during speech production, which can even be obtained with a small set of pictures and a large number of repetitions. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.