期刊
DEVELOPMENTAL COGNITIVE NEUROSCIENCE
卷 2, 期 4, 页码 448-457出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dcn.2012.04.001
关键词
Symbolic number processing; Children; Arithmetic skills; Numerical ratio effect; Left intraparietal sulcus
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC Discovery Grant)
- Canadian Institutes of Health Research (CIHR Operating Grant)
- Canada Foundation for Innovation
- Canada Research Chairs Program
The neural foundations of arithmetic learning are not well understood. While behavioral studies have revealed relationships between symbolic number processing and individual differences in children's arithmetic performance, the neurocognitive mechanisms that bind symbolic number processing and arithmetic are unknown. The current fMRI study investigated the relationship between children's brain activation during symbolic number comparison (Arabic digits) and individual differences in arithmetic fluency. A significant correlation was found between the numerical ratio effect on reaction times and accuracy and children's arithmetic scores. Furthermore, children with a stronger neural ratio effect in the left intraparietal sulcus (IPS) during symbolic number processing exhibited higher arithmetic scores. Previous research has demonstrated that activation of the IPS during numerical magnitude processing increases over the course of development, and that the left IPS plays an important role in symbolic number processing. The present findings extend this knowledge to show that children with more mature response modulation of the IPS during symbolic number processing exhibit higher arithmetic competence. These results suggest that the left IFS is a key neural substrate for the relationship between the relative of precision of the representation of numerical magnitude and school-level arithmetic competence. (C) 2012 Elsevier Ltd. All rights reserved.
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