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Developmental Neuropsychology Volume 44, 2019 - Issue 1
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Decoupling of the Occipitotemporal Cortex and the Brain’s Default-Mode Network in Dyslexia and a Role for the Cingulate Cortex in Good Readers: A Brain Imaging Study of Brazilian Children

Augusto BuchweitzSchool of Humanities, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilCorrespondence[email protected]
ORCID Iconhttp://orcid.org/0000-0003-3791-7472View further author information
ORCID Icon,
Adriana Corrêa CostaSchool of Humanities, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Rudineia ToazzaGraduate School of Neurosciences, Basic Health Sciences Institute, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, BrazilView further author information
,
Ana Bassôa de MoraesGraduate School of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Valentina Metsavaht CaraGraduate School of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil;School of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Nathália Bianchini EsperGraduate School of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil;School of Engineering, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Cristiano AguzzoliSchool of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Bruna GregolimSchool of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Luiz Fernando DreschSchool of Engineering, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
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Matheus Dorigatti SoldatelliSchool of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilView further author information
,
Jaderson Costa da CostaSchool of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilORCID Iconhttp://orcid.org/0000-0001-6776-1515View further author information
ORCID Icon,
Mirna Wetters PortuguezSchool of Medicine, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilORCID Iconhttp://orcid.org/0000-0003-4068-6249View further author information
ORCID Icon &
Alexandre Rosa FrancoSchool of Engineering, Brain Institute of Rio Grande do Sul (BRAINS), Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, BrazilORCID Iconhttp://orcid.org/0000-0002-1552-1090View further author information
ORCID Icon show all
Pages 146-157 | Published online: 07 Feb 2018
 
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ABSTRACT

The goal of the present study was to investigate intrinsic and reading-related brain function associated with dyslexia and typical readers in monolingual Brazilian children. Two fMRI studies were carried out: a resting-state and a word-reading study. The results show (a) underconnectivity between the occipitotemporal region (visual word form area) and the brain’s default-mode network in dyslexic readers and (b) more activation of the anterior cingulate cortex for typical readers relative to dyslexic readers. The findings provide evidence for brain connectivity and function differences in an underrepresented population in fMRI studies of dyslexia; the results suggest atypical intrinsic function, and differences in directed attention processes in dyslexia.

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Additional information

Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior – Brasil (CAPES) – Finance Code 001

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