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15q11.2 CNV affects cognitive, structural and functional correlates of dyslexia and dyscalculia.
Transl Psychiatry. 2017 Apr 25;7(4):e1109
Publication Type
M O Ulfarsson
G B Walters
O. Gustafsson
S. Steinberg
A. Silva
O M Doyle
M. Brammer
D F Gudbjartsson
S. Arnarsdottir
G A Jonsdottir
R S Gisladottir
G. Bjornsdottir
H. Helgason
L M Ellingsen
J G Halldorsson
E. Saemundsen
B. Stefansdottir
L. Jonsson
V K Eiriksdottir
G R Eiriksdottir
G H Johannesdottir
U. Unnsteinsdottir
B. Jonsdottir
B B Magnusdottir
P. Sulem
U. Thorsteinsdottir
E. Sigurdsson
D. Brandeis
A. Meyer-Lindenberg
H. Stefansson
K. Stefansson
Transl Psychiatry. 2017 Apr 25;7(4):e1109
Publication Type
Chromosome Aberrations
Chromosome Deletion
Chromosomes, Human, Pair 15 - genetics
Cognition - physiology
DNA Copy Number Variations - genetics
Developmental Disabilities - genetics
Dyscalculia - genetics
Dyslexia - genetics
Functional Neuroimaging - methods - standards
Iceland - epidemiology
Intellectual Disability - genetics
Magnetic Resonance Imaging - methods
Middle Aged
Neuropsychological Tests - standards
Temporal Lobe - anatomy & histology - diagnostic imaging
Young Adult
Several copy number variants have been associated with neuropsychiatric disorders and these variants have been shown to also influence cognitive abilities in carriers unaffected by psychiatric disorders. Previously, we associated the 15q11.2(BP1-BP2) deletion with specific learning disabilities and a larger corpus callosum. Here we investigate, in a much larger sample, the effect of the 15q11.2(BP1-BP2) deletion on cognitive, structural and functional correlates of dyslexia and dyscalculia. We report that the deletion confers greatest risk of the combined phenotype of dyslexia and dyscalculia. We also show that the deletion associates with a smaller left fusiform gyrus. Moreover, tailored functional magnetic resonance imaging experiments using phonological lexical decision and multiplication verification tasks demonstrate altered activation in the left fusiform and the left angular gyri in carriers. Thus, by using convergent evidence from neuropsychological testing, and structural and functional neuroimaging, we show that the 15q11.2(BP1-BP2) deletion affects cognitive, structural and functional correlates of both dyslexia and dyscalculia.
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PubMed ID
28440815 View in PubMed
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