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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Frontoparietal white matter diffusion properties predict mental arithmetic skills in children
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Frontoparietal white matter diffusion properties predict mental arithmetic skills in children

机译:额顶白质扩散特性预测儿童的心算能力

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摘要

Functional MRI studies of mental arithmetic consistently report blood oxygen level-dependent signals in the parietal and frontal regions. We tested whether white matter pathways connecting these regions are related to mental arithmetic ability by using diffusion tensor imaging (DTI) to measure these pathways in 28 children (age 10-15 years, 14 girls) and assessing their mental arithmetic skills. For each child, we identified anatomically the anterior portion of the superior longitudinal fasciculus (aSLF), a pathway connecting parietal and frontal cortex. We measured fractional anisotropy in a core region centered along the length of the aSLF. Fractional anisotropy in the left aSLF positively correlates with arithmetic approximation skill, as measured by a mental addition task with approximate answer choices. The correlation is stable in adjacent core aSLF regions but lower toward the pathway endpoints. The correlation is not explained by shared variance with other cognitive abilities and did not pass significance in the right aSLF. These measurements used DTI, a structural method, to test a specific functional model of mental arithmetic.
机译:心理算术的功能性MRI研究一致报告了顶叶和额叶区域血氧水平依赖性信号。我们通过使用弥散张量成像(DTI)来测量28位儿童(年龄在10-15岁,14位女童中)的这些物质并评估其心理算术技能,从而测试了连接这些区域的白质途径是否与心理算术能力相关。对于每个孩子,我们在解剖学上都确定了上纵筋膜(aSLF)的前部,即连接顶叶和额叶皮层的通路。我们在以aSLF的长度为中心的核心区域中测量了分数各向异性。左aSLF的分数各向异性与算术近似技巧呈正相关,这是由具有近似答案选择的心理加法任务测得的。相关性在相邻的核心aSLF区域中稳定,但朝通路终点降低。相关性不能通过与其他认知能力的共同方差来解释,并且在正确的aSLF中没有通过显着性。这些测量使用DTI(一种结构方法)来测试心理算术的特定功能模型。

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