A neurocognitive model for word read leaning: towards an understanding of developmental dyslexia

本研究的目的是提出并评价一种新的发展性阅读障碍的动态模型。本研究采用功能磁共振成像（fMRI）技术研究了词汇阅读学习与脑活动变化的关系。与文字阅读学习后期相比，早期双侧颞下回后外侧、枕中回、枕上级回和额下回的活动增强。相反的对比显示双侧缘上回和角回的活动更大。这些结果表明，背侧流（亚词汇路径）和腹侧流（词汇路径）都参与了早期的词汇阅读学习。

Purpose of this study was to propose and evaluate a new dynamic model of developmental dyslexia. Functional magnetic resonance imaging (fMRI) was employed to investigate the relationship between word reading learning and changes in brain activity. Compared to the later stage of word reading learning, the early stage showed greater activity in the bilateral posterior lateral inferior temporal gyrus, middle and superior occipital gyrus, and inferior frontal gyrus. The opposite contrast revealed greater activity in the bilateral supramarginal gyrus and angular gyrus. These results indicate that both the dorsal (sublexical route) and ventral stream (lexical route) participate in the early stage of word reading learning.