pubmed-article:20046827 | rdf:type | pubmed:Citation | lld:pubmed |
pubmed-article:20046827 | lifeskim:mentions | umls-concept:C1411876 | lld:lifeskim |
pubmed-article:20046827 | lifeskim:mentions | umls-concept:C0200760 | lld:lifeskim |
pubmed-article:20046827 | lifeskim:mentions | umls-concept:C0678723 | lld:lifeskim |
pubmed-article:20046827 | lifeskim:mentions | umls-concept:C0205195 | lld:lifeskim |
pubmed-article:20046827 | lifeskim:mentions | umls-concept:C0332120 | lld:lifeskim |
pubmed-article:20046827 | lifeskim:mentions | umls-concept:C0458003 | lld:lifeskim |
pubmed-article:20046827 | pubmed:dateCreated | 2010-1-4 | lld:pubmed |
pubmed-article:20046827 | pubmed:abstractText | Poor mathematical abilities adversely affect academic and career opportunities. The neuroanatomical basis of developmental dyscalculia (DD), a specific learning deficit with prevalence rates exceeding 5%, is poorly understood. We used structural MRI and diffusion tensor imaging (DTI) to examine macro- and micro-structural impairments in 7- to 9-year-old children with DD, compared to a group of typically developing (TD) children matched on age, gender, intelligence, reading abilities and working memory capacity. Voxel-based morphometry (VBM) revealed reduced grey matter (GM) bilaterally in superior parietal lobule, intra-parietal sulcus, fusiform gyrus, parahippocampal gyrus and right anterior temporal cortex in children with DD. VBM analysis also showed reduced white matter (WM) volume in right temporal-parietal cortex. DTI revealed reduced fractional anisotropy (FA) in this WM region, pointing to significant right hemisphere micro-structural impairments. Furthermore, FA in this region was correlated with numerical operations but not verbal mathematical reasoning or word reading. Atlas-based tract mapping identified the inferior longitudinal fasciculus, inferior fronto-occipital fasciculus and caudal forceps major as key pathways impaired in DD. DTI tractography suggests that long-range WM projection fibers linking the right fusiform gyrus with temporal-parietal WM are a specific source of vulnerability in DD. Network and classification analysis suggest that DD in children may be characterized by multiple dysfunctional circuits arising from a core WM deficit. Our findings link GM and WM abnormalities in children with DD and they point to macro- and micro-structural abnormalities in right hemisphere temporal-parietal WM, and pathways associated with it, as key neuroanatomical correlates of DD. | lld:pubmed |
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pubmed-article:20046827 | pubmed:language | eng | lld:pubmed |
pubmed-article:20046827 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
pubmed-article:20046827 | pubmed:status | PubMed-not-MEDLINE | lld:pubmed |
pubmed-article:20046827 | pubmed:issn | 1662-5161 | lld:pubmed |
pubmed-article:20046827 | pubmed:author | pubmed-author:MenonVinodV | lld:pubmed |
pubmed-article:20046827 | pubmed:author | pubmed-author:UddinLucina... | lld:pubmed |
pubmed-article:20046827 | pubmed:author | pubmed-author:RykhlevskaiaE... | lld:pubmed |
pubmed-article:20046827 | pubmed:author | pubmed-author:KondosLeezaL | lld:pubmed |
pubmed-article:20046827 | pubmed:issnType | Electronic | lld:pubmed |
pubmed-article:20046827 | pubmed:volume | 3 | lld:pubmed |
pubmed-article:20046827 | pubmed:owner | NLM | lld:pubmed |
pubmed-article:20046827 | pubmed:authorsComplete | Y | lld:pubmed |
pubmed-article:20046827 | pubmed:pagination | 51 | lld:pubmed |
pubmed-article:20046827 | pubmed:year | 2009 | lld:pubmed |
pubmed-article:20046827 | pubmed:articleTitle | Neuroanatomical correlates of developmental dyscalculia: combined evidence from morphometry and tractography. | lld:pubmed |
pubmed-article:20046827 | pubmed:affiliation | Department of Psychiatry and Behavioral Sciences, Stanford University CA, USA. | lld:pubmed |
pubmed-article:20046827 | pubmed:publicationType | Journal Article | lld:pubmed |