Kuo Wen-Jui, Yeh Tzu-Chen, Lee Jun-Ren, Chen Li-Fen, Lee Po-Lei, Chen Shyan-Shiou, Ho Low-Tone, Hung Daisy L, Tzeng Ovid J-L, Hsieh Jen-Chuen
Cognitive Neuropsychology Laboratory, National Yang-Ming University, Taipei, Taiwan.
Neuroimage. 2004 Apr;21(4):1721-31. doi: 10.1016/j.neuroimage.2003.12.007.
The present study used functional magnetic resonance imaging (fMRI) to investigate the neural mechanisms underlying the orthographic and phonological processing of Chinese characters. Four tasks were devised, including one homophone judgment and three physical judgments of characters, pseudo-characters, and Korean-like nonsense figures. While the left occipitotemporal region, left dorsal processing stream, and right middle frontal gyrus constitute a network for orthographic processing, the left premotor gyrus, left middle/inferior frontal gyrus, supplementary motor area (SMA), and the left temporoparietal region work in concert for phonological processing. The ventral part of the left inferior frontal cortex responds specifically to the character stimuli, suggesting a general lexical processing role for this region for linguistic material. The stronger activation of the dorsal visual stream by Chinese homophone judgment pinpoints a tight coupling between phonological representation of Chinese characters and corresponding orthographic percepts. The concomitant engagement of sets of regions for different levels of Chinese orthographic and phonological processing is consistent with the notion of distributed parallel processing.
本研究采用功能磁共振成像（fMRI）来探究汉字正字法和语音处理背后的神经机制。设计了四项任务，包括一项同音字判断任务以及三项关于汉字、假字和类似韩文的无意义图形的物理判断任务。虽然左侧枕颞区、左侧背侧加工流和右侧额中回构成了一个正字法加工网络，但左侧运动前回、左侧额中/下回、辅助运动区（SMA）和左侧颞顶区协同进行语音处理。左侧额下回皮质的腹侧部分对汉字刺激有特异性反应，表明该区域对语言材料具有一般的词汇加工作用。中文同音字判断对背侧视觉流的更强激活表明汉字的语音表征与相应的正字法感知之间存在紧密耦合。不同水平的中文正字法和语音处理所涉及的区域集的同时参与与分布式并行处理的概念一致。
