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RESEARCH PRODUCT
Impaired parietal magnitude processing in developmental dyscalculia
Ian HollowayGavin R. PricePekka RäsänenDaniel AnsariManu Vesterinensubject
Agricultural and Biological Sciences(all)Learning DisabilitiesBiochemistry Genetics and Molecular Biology(all)Specific learning disabilityDevelopmental DisabilitiesNeuropsychologyNumerosity adaptation effectContext (language use)Intraparietal sulcusmedicine.diseaseGeneral Biochemistry Genetics and Molecular BiologyParietal LobeDyscalculiaDevelopmental DyscalculiamedicineMathematical abilityHumansGeneral Agricultural and Biological SciencesChildNeuroscienceMathematicsMathematicsdescription
Summary Developmental dyscalculia (DD) is a specific learning disability affecting the acquisition of school-level mathematical abilities in the context of otherwise normal academic achievement, with prevalence estimates in the order of 3–6% [1] . Behavioural studies show deficits in elementary numerical processing among individuals with pure DD [2,3], indicating that deficits in higher-level mathematical skills may stem from impaired representation and processing of basic numerical magnitude. Adult neuropsychological and neuroimaging research points to the intraparietal sulcus as a key region for the representation and processing of numerical magnitude [4]. This raises the possibility of a parietal dysfunction as a root cause of DD [5]. We show that, in children with pure DD, the right intraparietal sulcus is not modulated in response to numerical processing demands to the same degree as in typically developing children. This finding provides the first direct evidence for a specific impairment of parietal magnitude systems in DD during non-symbolic numerosity processing.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-12-01 | Current Biology |