Department of Speech Pathology and Audiology, University of Alberta, Edmonton, Alberta, Canada T6G 2G4.
Brain Lang. 2013 May;125(2):203-14. doi: 10.1016/j.bandl.2012.04.009. Epub 2012 May 24.
Neurobiology of reading research has yet to explore whether reliance on the ventral-lexical stream during word reading can be enhanced by the instructed reading strategy, or whether it is impervious to such strategies. We examined Instructions: name all vs. name words (based on spelling), Word Type: regular words vs. exception words, and Word Frequency (WF) in print (log10 HAL WF) in an experiment while measuring fMRI BOLD and overt naming reaction time (RT) simultaneously. Instructions to name words increased overall reliance on the ventral-lexical stream, as measured by visible BOLD activation and the WF effect on RT, with regular words showing the greatest effects as a function of this reading strategy. Furthermore, the pattern of joint effects of these variables on RT supports the notion of cascaded, not parallel, processing. These results can be accommodated by dual-stream cascaded models of reading, and present a challenge to single-mechanism parallel processing models.
阅读神经生物学研究尚未探讨在阅读单词时是否可以通过指导阅读策略来增强对腹侧词汇流的依赖，或者这种策略是否无法实现。我们在同时测量 fMRI BOLD 和外显命名反应时间 (RT) 的实验中检查了指令：命名所有 vs. 命名单词（基于拼写）、单词类型：规则单词 vs. 例外单词和单词频率 (WF) 在印刷品中（log10 HAL WF）。指令命名单词增加了对腹侧词汇流的整体依赖，这可以通过可见的 BOLD 激活和 WF 对 RT 的影响来衡量，规则单词显示出最大的效果，这是由于这种阅读策略的作用。此外，这些变量对 RT 的联合效应模式支持级联而不是平行处理的概念。这些结果可以被阅读的双流级联模型所解释，并对单一机制的并行处理模型提出了挑战。
