A large-scale study revealed that genetic variants linked to dyslexia are associated with differences in brain areas controlling motor coordination, vision, and language.
Using data from over a million individuals, researchers calculated genetic “polygenic scores” for dyslexia and analyzed their relationship to brain structures. Higher genetic risk for dyslexia was tied to lower volumes in brain regions related to speech processing and movement, and increased volumes in the visual cortex. Differences in the brain’s internal capsule, which connects regions, were also observed.
These findings suggest that dyslexia is a complex trait involving altered brain development and cognition, potentially aiding earlier diagnosis and personalized interventions.
To learn more, read the full article: https://neurosciencenews.com/genetics-dyslexia-vision-language-28275/
Source: Max Planck Institute
Original Research: Open access.
“Distinct impact modes of polygenic disposition to dyslexia in the adult brain” by Sourena Soheili-Nezhad et al. DRYAD