Response-Selection-Related Parietal Activation during Number Comparison
Journal of Cognitive Neuroscience
Common Neural Substrates for Response Selection across Modalities and Mapping Paradigms
Journal of Cognitive Neuroscience
Parietal Representation of Symbolic and Nonsymbolic Magnitude
Journal of Cognitive Neuroscience
The Neural Substrate of Orientation Working Memory
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Differential Contributions of the Left and Right Inferior Parietal Lobules to Number Processing
Journal of Cognitive Neuroscience
Neural Evidence Linking Visual Object Enumeration and Attention
Journal of Cognitive Neuroscience
Towards a Framework for Modelling Engagement Dynamics in Multiple Learning Domains
International Journal of Artificial Intelligence in Education - Best of AIED 2011
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Developmental dyscalculia (DD) is a deficit in number processing and arithmetic that affects 3-6% of schoolchildren. The goal of the present study was to analyze cerebral bases of DD related to symbolic number processing. Children with DD aged 9-11 years and matched children with no learning disability history were investigated using fMRI. The two groups of children were controlled for general cognitive factors, such as working memory, reading abilities, or IQ. Brain activations were measured during a number comparison task on pairs of Arabic numerals and a color comparison task on pairs of nonnumerical symbols. In each task, pairs of stimuli that were close or far on the relevant dimension were constituted. Brain activation in bilateral intraparietal sulcus (IPS) was modulated by numerical distance in controls but not in children with DD. Moreover, although the right IPS responded to numerical distance only, the left IPS was influenced by both numerical and color distances in control children. Our findings suggest that dyscalculia is associated with impairment in areas involved in number magnitude processing and, to a lesser extent, in areas dedicated to domain-general magnitude processing.