应用动态因果模型研究阅读神经网络背、腹侧通路的协作机制

发布时间：2018-05-01 17:19

本文选题：视觉词汇阅读 + 动态因果模型　；参考：《心理科学进展》2015年05期

【摘要】：在神经网络的最新取向下,探讨阅读脑机制中背侧和腹侧通路的协作机制,是解决语言认知神经科学多个理论问题共同面临的焦点。本项目拟通过两个脑功能成像实验,建构汉字阅读的动态因果模型,系统地考察汉字阅读的神经网络,以及阅读网络中背、腹侧通路的协作机制。实验一利用快速适应实验范式的优点,识别和考察汉字阅读涉及的认知成分所对应的功能脑区,以及脑区联结形成的神经回路,并建构汉字阅读的动态因果模型;实验二进一步考察在刺激属性(语音和语义信息)和任务要求下阅读脑区的动态激活及相互作用。通过不同任务下的模型对比,重点探讨阅读网络的脑区联结模式变化,尤其是背、腹侧通路受刺激和任务影响时的协作机制。研究结果将为揭示阅读的神经生理模型、解决语言特异性脑区激活的争论等理论问题提供直接的证据,还能为语言教学、阅读障碍矫治、以及临床应用提供理论基础与指导。
[Abstract]:Under the latest orientation of neural network, it is the focus of solving many theoretical problems of language cognitive neuroscience to explore the cooperative mechanism of dorsal and ventral pathways in the mechanism of reading brain. In this project, two brain functional imaging experiments were conducted to construct a dynamic causal model for Chinese character reading, and to investigate systematically the neural network of Chinese character reading and the cooperative mechanism of the dorsal and ventral pathways in the reading network. Experiment one uses the advantage of fast adaptation paradigm to identify and investigate the functional brain region corresponding to the cognitive components involved in Chinese character reading and the neural circuit formed by the brain region connection, and to construct a dynamic causal model of Chinese character reading. Experiment 2 further examined the dynamic activation and interaction of the reading brain under the stimulus attributes (phonological and semantic information) and task requirements. Through the comparison of models under different tasks, this paper focuses on the changes of brain connection patterns in the reading network, especially the cooperative mechanism when the dorsal and ventral pathways are stimulated and affected by tasks. The results will provide direct evidence for revealing the neurophysiological model of reading, solving the debate on the activation of language specific brain regions, and also provide theoretical basis and guidance for language teaching, correction of reading disorders, and clinical application.
【作者单位】：陕西省行为与认知神经科学重点实验室陕西师范大学心理学院;
【基金】：国家自然科学基金(31400966,31171077) 教育部人文社科青年基金项目(14YJC190019)
【分类号】：B842

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