Network dynamics in dyslexia: Review and implications for remediation
1University of Toronto, Toronto, ON M5 S 1A1, Canada.
Research in Developmental Disabilities
|August 7, 2016
Summary
Dyslexia neurobiology theories are fractional; an Interactive Specialization model suggests dysfunctional orchestration of distributed brain networks is key. Integrating these networks may prevent phonological processing deficits in dyslexia.
Area of Science:
- Neurobiology
- Developmental Neuroscience
- Cognitive Science
Background:
- Existing neurobiological theories of dyslexia often focus on isolated brain regions or mechanisms.
- A comprehensive understanding requires integrating findings across multiple brain systems.
Purpose of the Study:
- To propose an Interactive Specialization (IS) model for dyslexia.
- To synthesize current research supporting an integrative neurobiological theory of dyslexia.
Main Methods:
- Review and synthesis of extant neurobiological research on dyslexia.
- Identification of key brain networks implicated in phonological processing.
Main Results:
- Support for an IS model involving dysfunctional orchestration of distributed neuronal networks.
- Key circuitry includes frontoparietal cognitive control, posterior corpus callosum, and left arcuate fasciculus.
- Developmental coalescence of these regions is crucial for preventing phonological deficits.
Conclusions:
- An integrative theory of dyslexia is proposed, centered on the IS model.
- Dysfunctional orchestration of specific brain networks underlies dyslexia.
- Remedial efforts should promote interactions across these identified neural territories.
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