Seki A, Koeda T, Sugihara S, Kamba M, Hirata Y, Ogawa T, Takeshita K
Division of Child Neurology, Institute of Neurological Sciences, Faculty of Medicine, Tottori University, 36-1 Nishi-machi, 683-8504, Yonago, Japan.
Brain Dev. 2001 Aug;23(5):312-6. doi: 10.1016/s0387-7604(01)00228-5.
A functional magnetic resonance imaging (fMRI) study during Japanese 'kana' readings was performed on Japanese dyslexic children. Five dyslexic children (aged 9-12 years) and five healthy children (aged 9-11 years) were investigated. The fMRI examination was performed by getting these children to read sentences constructed from Japanese phonograms, 'kana', compared with staring at meaningless figures as a control task. All control subjects showed activation of the left middle temporal gyrus. In the dyslexic children, the activation of the middle temporal gyrus was rather vague. However, other distinctively activated regions were detected as follows: the bilateral occipital cortex in two dyslexics, the inferior part of the frontal regions in two other dyslexics, and both the bilateral occipital cortex and the inferior part of precentral gyrus in the remaining one. These results indicate compensatory management processes for the unskilled reading ability of dyslexic children. The present results were similar to previous ones for adult dyslexia with the Roman alphabet, and suggest that brain malfunction in dyslexia during the task of reading must be common despite differences in languages.
一项针对日本诵读困难儿童的功能性磁共振成像（fMRI）研究，研究内容为日语“假名”阅读。研究调查了5名诵读困难儿童（年龄在9至12岁之间）和5名健康儿童（年龄在9至11岁之间）。fMRI检查通过让这些儿童阅读由日语表音文字“假名”组成的句子来进行，同时让他们盯着无意义的图形作为对照任务。所有对照受试者的左侧颞中回均显示激活。在诵读困难儿童中，颞中回的激活相当模糊。然而，还检测到了其他明显激活的区域，具体如下：两名诵读困难儿童的双侧枕叶皮质，另外两名诵读困难儿童额叶区域的下部，以及其余一名儿童的双侧枕叶皮质和中央前回下部。这些结果表明了诵读困难儿童阅读能力不足的代偿管理过程。目前的结果与之前针对使用罗马字母的成人诵读困难的研究结果相似，这表明尽管语言不同，但阅读任务中诵读困难的大脑功能障碍一定是常见的。
