Kim Kyung Hwan, Kim Ja Hyun
Department of Biomedical Engineering, College of Health Science, Yonsei University, 234 Maeji-ri, Heungup-myun, Wonju, Kangwon-do 220-710, South Korea.
Neurosci Lett. 2006 Feb 20;394(3):227-32. doi: 10.1016/j.neulet.2005.10.101. Epub 2005 Dec 15.
The aim of this study was to compare spatiotemporal cortical activation patterns during the visual perception of Korean, English, and Chinese words. The comparison of these three languages offers an opportunity to study the effect of written forms on cortical processing of visually presented words, because of partial similarity/difference among words of these languages, and the familiarity of native Koreans with these three languages at the word level. Single-character words and pictograms were excluded from the stimuli in order to activate neuronal circuitries that are involved only in word perception. Since a variety of cerebral processes are sequentially evoked during visual word perception, a high-temporal resolution is required and thus we utilized event-related potential (ERP) obtained from high-density electroencephalograms. The differences and similarities observed from statistical analyses of ERP amplitudes, the correlation between ERP amplitudes and response times, and the patterns of current source density, appear to be in line with demands of visual and semantic analysis resulting from the characteristics of each language, and the expected task difficulties for native Korean subjects.
本研究的目的是比较在视觉感知韩语、英语和中文单词期间的时空皮层激活模式。对这三种语言进行比较，为研究书面形式对视觉呈现单词的皮层处理的影响提供了一个机会，这是因为这些语言的单词之间存在部分相似性/差异，以及韩国母语者在单词层面上对这三种语言的熟悉程度。为了激活仅参与单词感知的神经回路，刺激物中排除了单字和象形文字。由于在视觉单词感知过程中会依次引发各种大脑过程，因此需要高时间分辨率，所以我们利用了从高密度脑电图获得的事件相关电位（ERP）。从ERP振幅的统计分析、ERP振幅与反应时间之间的相关性以及电流源密度模式中观察到的差异和相似性，似乎符合每种语言的特征所导致的视觉和语义分析需求，以及韩国母语受试者预期的任务难度。
