BACKGROUND： The role of the left midfusiform gyrus as a target for visual word processing has been a topic of discussion. Numerous studies have utilized alphabetic writing for subject matter. However, few have addres...BACKGROUND： The role of the left midfusiform gyrus as a target for visual word processing has been a topic of discussion. Numerous studies have utilized alphabetic writing for subject matter. However, few have addressed visual processing of Chinese characters in the left midfusiform gyrus. OBJECTIVE： To verify visual processing of Chinese characters and images in the left midfusiform gyrus using functional magnetic resonance imaging. DESIGN, TIME AND SETTING： A blocked design paradigm study. Experiments were performed at the Room of Magnetic Resonance, Guangdong Provincial Second People＇s Hospital, China from May to June 2009. PARTICIPANTS： A total of eight undergraduate students were recruited from Guangzhou University of China, comprising two females and six males, aged 20-23 years. The subjects were right-handed which was determined by a Chinese standard questionnaire. None of the subjects had a history of psychoneurosis, familial disease, color blindness, or color weakness. METHODS： A total of eight undergraduates were enrolled as subjects. Picture-naming and verb generation tasks were employed through the use of functional magnetic resonance imaging. Analysis of Functional Neurolmages software was used to process the data. MAIN OUTCOME MEASURES： Visual processing of Chinese characters and images in the left midfusiform gyrus was measured. RESULTS： Picture-naming and verb generation tasks were shown to significantly activate the bilateral midfusiform gyrus. Activation occurred in the visual word form area of the left midfusiform gyrus. CONCLUSION： The left midfusiform gyrus plays a general role in visual processing of Chinese characters and images.展开更多
大脑梭状回中部被认为是视觉词形加工区(Visual Word Form Area,VWFA)。近年来的研究对VWFA的功能提出了质疑,研究者开始关注VWFA作为复杂阅读网络的一部分与其它脑区的动态联结机制,主要集中在三个方面:一是梭状回中部对于视觉词形选...大脑梭状回中部被认为是视觉词形加工区(Visual Word Form Area,VWFA)。近年来的研究对VWFA的功能提出了质疑,研究者开始关注VWFA作为复杂阅读网络的一部分与其它脑区的动态联结机制,主要集中在三个方面:一是梭状回中部对于视觉词形选择性敏感的本质;二是它在词汇阅读的神经网络中的作用;最后是语言经验对于VWFA认知神经功能的塑造作用。结合以上研究的最新进展,文中指明从动态神经网络的角度揭示大脑功能成为今后认知神经科学研究的最新取向。展开更多
镜像等效或守恒是动物与人类个体对两侧对称自然物体的一种进化自适应加工。但是,这种知觉特性会妨碍包含镜像字符的文字阅读学习。阅读者有必要学会利用镜像泛化抑制的“去学习”机制,打破镜像等效或守恒,以获得识别镜像字符的能力。...镜像等效或守恒是动物与人类个体对两侧对称自然物体的一种进化自适应加工。但是,这种知觉特性会妨碍包含镜像字符的文字阅读学习。阅读者有必要学会利用镜像泛化抑制的“去学习”机制,打破镜像等效或守恒,以获得识别镜像字符的能力。这一过程中,左侧梭状回皮层通过与早期视觉皮层、顶叶皮层和口语脑网络的交互作用,逐渐发展出一个可以识别镜像字符的视觉词形区(visual word form area,VWFA)。今后的研究需要关注两半球及其连合纤维在镜像等效或守恒加工中的作用、镜像泛化与抑制的详尽加工机制及其对镜像书写的影响、正常汉语儿童的汉字镜像泛化加工等问题。展开更多
神经元再利用假说是指新的文化功能侵入原有的功能皮质区域后,会形成和所获得的新文化功能相接近的神经元回路,但这并不会导致此区域的原有功能消失,而是弱化了原有的功能,文化的习得会受到原有脑结构的限制。视觉词形区(visual word fo...神经元再利用假说是指新的文化功能侵入原有的功能皮质区域后,会形成和所获得的新文化功能相接近的神经元回路,但这并不会导致此区域的原有功能消失,而是弱化了原有的功能,文化的习得会受到原有脑结构的限制。视觉词形区(visual word form area,VWFA)的形成就是再利用了视觉皮质的形状识别区域来专门加工视觉单词,它位于大脑枕颞叶交接处的梭状回区域。结合近几年来关于汉字和其他文字的研究,从神经元再利用假说的视角,来探讨视觉词形区的形成机制,并从中得出对汉字阅读教育的启示。展开更多
基金the Key Programming Research Project of Education Science During the 11~(th) Five-Year Plan Period of Guangdong Province, No. 06TJZ014the Programming Project of Education Science During the 11~(th) Five-Year Plan Period of Guangzhou City, No. 07B290
文摘BACKGROUND： The role of the left midfusiform gyrus as a target for visual word processing has been a topic of discussion. Numerous studies have utilized alphabetic writing for subject matter. However, few have addressed visual processing of Chinese characters in the left midfusiform gyrus. OBJECTIVE： To verify visual processing of Chinese characters and images in the left midfusiform gyrus using functional magnetic resonance imaging. DESIGN, TIME AND SETTING： A blocked design paradigm study. Experiments were performed at the Room of Magnetic Resonance, Guangdong Provincial Second People＇s Hospital, China from May to June 2009. PARTICIPANTS： A total of eight undergraduate students were recruited from Guangzhou University of China, comprising two females and six males, aged 20-23 years. The subjects were right-handed which was determined by a Chinese standard questionnaire. None of the subjects had a history of psychoneurosis, familial disease, color blindness, or color weakness. METHODS： A total of eight undergraduates were enrolled as subjects. Picture-naming and verb generation tasks were employed through the use of functional magnetic resonance imaging. Analysis of Functional Neurolmages software was used to process the data. MAIN OUTCOME MEASURES： Visual processing of Chinese characters and images in the left midfusiform gyrus was measured. RESULTS： Picture-naming and verb generation tasks were shown to significantly activate the bilateral midfusiform gyrus. Activation occurred in the visual word form area of the left midfusiform gyrus. CONCLUSION： The left midfusiform gyrus plays a general role in visual processing of Chinese characters and images.
文摘大脑梭状回中部被认为是视觉词形加工区(Visual Word Form Area,VWFA)。近年来的研究对VWFA的功能提出了质疑,研究者开始关注VWFA作为复杂阅读网络的一部分与其它脑区的动态联结机制,主要集中在三个方面:一是梭状回中部对于视觉词形选择性敏感的本质;二是它在词汇阅读的神经网络中的作用;最后是语言经验对于VWFA认知神经功能的塑造作用。结合以上研究的最新进展,文中指明从动态神经网络的角度揭示大脑功能成为今后认知神经科学研究的最新取向。
文摘镜像等效或守恒是动物与人类个体对两侧对称自然物体的一种进化自适应加工。但是,这种知觉特性会妨碍包含镜像字符的文字阅读学习。阅读者有必要学会利用镜像泛化抑制的“去学习”机制,打破镜像等效或守恒,以获得识别镜像字符的能力。这一过程中,左侧梭状回皮层通过与早期视觉皮层、顶叶皮层和口语脑网络的交互作用,逐渐发展出一个可以识别镜像字符的视觉词形区(visual word form area,VWFA)。今后的研究需要关注两半球及其连合纤维在镜像等效或守恒加工中的作用、镜像泛化与抑制的详尽加工机制及其对镜像书写的影响、正常汉语儿童的汉字镜像泛化加工等问题。
文摘神经元再利用假说是指新的文化功能侵入原有的功能皮质区域后,会形成和所获得的新文化功能相接近的神经元回路,但这并不会导致此区域的原有功能消失,而是弱化了原有的功能,文化的习得会受到原有脑结构的限制。视觉词形区(visual word form area,VWFA)的形成就是再利用了视觉皮质的形状识别区域来专门加工视觉单词,它位于大脑枕颞叶交接处的梭状回区域。结合近几年来关于汉字和其他文字的研究,从神经元再利用假说的视角,来探讨视觉词形区的形成机制,并从中得出对汉字阅读教育的启示。
