Frequency effects of Chinese character processing in the brain: an event-related fMRI study
Frequency effects of Chinese character processing in the brain: an event-related fMRI study
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DOI：
10.1016/s1053-8119(03)00015-6
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发表时间：
2003-03-01
期刊：
影响因子：
5.7
通讯作者：
Hsieh, JC
中科院分区：
文献类型：
--
作者：
Kuo, WJ;Yeh, TC;Hsieh, JC
了解大脑如何处理出现频率不同的汉字可能有助于了解不同语言的拼写变化对大脑阅读过程的影响程度。本研究采用事件相关功能磁共振成像技术研究汉字加工的频率效应。阅读低频字激活的脑区包括左侧运动前回/额下回、辅助运动区、左侧前额叶、左侧后颞下回、左侧顶上皮层和舌皮层，而阅读高频字激活的脑区包括左侧缘上回/角回和左侧楔前叶。阅读生僻字的激活模式反映了一个更为苛刻的提取、形成和协调语音输出的加工过程。进入词汇通路可能有利于高频字符的阅读。通过揭示不同出现频率的阅读汉字的脑反应差异，不仅证明了阅读汉字和字母语言的功能神经解剖学之间的实质性重叠，而且还证明了语言特异性内容与普遍机制分离的特征。(C)2003 Elsevier Science（美国）。All rights reserved.
Knowing how the brain processes Chinese characters of different frequencies of occurrence may shed light on the extent to which orthographic variations of different languages can influence reading processes in the brain. In the present study, event-related fMRI was used to investigate frequency effects on Chinese character processing. Reading low-frequency characters invoked higher activation in several brain regions including the left premotor/inferior frontal gyrus, supplementary motor area, left anterior insula, left posterior inferior temporal gyrus, left superior parietal cortex, and lingual cortex, while reading high-frequency characters resulted in higher activation in the left supramarginal/angular gyrus and left precuneus. The activation pattern of reading infrequently encountered characters reflects a more demanding processing procedure of retrieving, formulating, and coordinating the phonological output. Access to the lexical route may benefit the reading of high-frequency characters. By uncovering the differential brain responses in reading Chinese characters of different occurrence frequencies, not only has a substantial overlap between functional neuroanatomy of reading Chinese and alphabetical languages been demonstrated, but also features permitting the separation of language-specific content from universal mechanisms. (C) 2003 Elsevier Science (USA). All rights reserved.