There are several independent sets of findings concerning the neural basis of reading. One set demonstrates a powerful relationship between phonological processing and reading skills. Another set reveals a relationship between visual responses in the motion pathways and reading skills. It is widely assumed that these two findings are unrelated. We tested the hypothesis that phonological awareness is related to motion responsivity in children's MT+. We measured BOLD signals to drifting gratings as a function of contrast. Subjects were 35 children ages 7-12 years with a wide range of reading skills. Contrast responsivity in MT+, but not V1, was correlated with phonological awareness and to a lesser extent with two other measures of reading. No correlation was found between MT+ signals and rapid naming, age or general IQ measures. These results establish an important link between visual and phonological processing in children and suggest that MT+ responsivity is a marker for healthy reading development.

译文

关于阅读的神经基础,有几组独立的发现。一套证明了语音处理和阅读技能之间的强大关系。另一组揭示了运动路径中的视觉反应与阅读技能之间的关系。人们普遍认为这两个发现是不相关的。我们检验了以下假设: 语音意识与儿童MT的运动响应有关。我们测量了漂移光栅的BOLD信号作为对比度的函数。对象为35名7-12岁的儿童,具有广泛的阅读技能。MT中的对比度响应度 (而非V1) 与语音意识相关,在较小程度上与其他两种阅读量度相关。在MT信号与快速命名,年龄或一般智商测量之间未发现相关性。这些结果在儿童的视觉和语音处理之间建立了重要的联系,并表明MT响应度是健康阅读发展的标志。

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