Kucian Karin, Loenneker Thomas, Martin Ernst, von Aster Michael
MR-Research Center, University Children's Hospital, Zurich, Switzerland.
Dev Neuropsychol. 2011;36(6):741-62. doi: 10.1080/87565641.2010.549867.
This study investigated areas of brain activation related to non-symbolic distance effects in children with and without developmental dyscalculia (DD). We examined 15 children with DD (11.3 years) and 15 controls (10.6 years) by means of functional magnetic resonance imaging (fMRI). Both groups displayed similar behavioral performance, but differences in brain activation were observed, particularly in the supplementary motor area and the right fusiform gyrus, where children with DD demonstrated stronger activation. These results suggest that dyscalculic children engage areas attributed to higher difficulty in response selection more than control children, possibly due to a deficient development of a spatial number representation in DD.
本研究调查了患有和未患有发育性计算障碍（DD）的儿童中与非符号距离效应相关的脑激活区域。我们通过功能磁共振成像（fMRI）对15名患有DD的儿童（11.3岁）和15名对照组儿童（10.6岁）进行了检查。两组在行为表现上相似，但在脑激活方面观察到差异，特别是在辅助运动区和右侧梭状回，患有DD的儿童在这些区域表现出更强的激活。这些结果表明，与对照组儿童相比，患有计算障碍的儿童在反应选择中更多地激活了与更高难度相关的区域，这可能是由于DD中空间数字表征发育不足所致。
