Intact But Less Accessible Phonetic Representations in Adults with Dyslexia
Year: 2013
Type: article
Study design: Observational Study
Abstract: Dyslexia is a severe and persistent reading and spelling disorder caused by impairment in the ability to manipulate speech sounds. We combined functional magnetic resonance brain imaging with multivoxel pattern analysis and functional and structural connectivity analysis in an effort to disentangle whether dyslexics' phonological deficits are caused by poor quality of the phonetic representations or by difficulties in accessing intact phonetic representations. We found that phonetic representations are hosted bilaterally in primary and secondary auditory cortices and that their neural quality (in terms of robustness and distinctness) is intact in adults with dyslexia. However, the functional and structural connectivity between the bilateral auditory cortices and the left inferior frontal gyrus (a region involved in higher-level phonological processing) is significantly hampered in dyslexics, suggesting deficient access to otherwise intact phonetic representations.
Source: Science
Institutions: KU Leuven, University College London, University of Oxford, ETH Zurich
Language: English
Subfield: Developmental and Educational Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: green
Funder: Wellcome Trust
Awards: G1323268240, G1560478933, Large-scale alterations of cortical activity induced by brain lesions and their relevance to behavioural deficits., Neurobiology of speech communication:cognition, plasticity and social interactions, The temporal dynamics of visual selection: convergence from lesion-symptom mapping and the intact functioning brain., The temporal dynamics of visual selection: convergence from lesion-symptom mapping and the intact functioning brain.
OpenAlex ID: W1963991285