Brain activation on pre-reading tasks reveals at-risk status for dyslexia in 6-year-old children: Health and Disability

Karsten Specht, Kenneth Hugdahl, Sonja Ofte, Merethe NygÅrd, Atle BjØrnerud, Elena M Plante, Turid Helland

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

In this fMRI-study, 6-year-old children considered at risk for dyslexia were compared with an age-/gender-matched control group for differences in brain activation when presented with visual stimuli differing in demands for literacy processing. Stimuli were nameable pictures, brand logos familiar to children, and written words - these were either regularly spelled using early-acquired rules ("alphabetic") or more complex ("orthographic"). Brain responses distinguished between the presentation conditions, as a function of group, within many cortical areas. Activation in the alphabetic and orthographic conditions in the left angular gyrus correlated with individual at-risk index scores, and activation in inferior occipito-temporal regions further indicated differential activation for the two groups related to orthographic processing, especially. Since similar patterns are reported in adult dyslexics when processing written words, it appears that sensitivity to the cortical differentiation of reading networks is established prior to formal literacy training.

Original languageEnglish (US)
Pages (from-to)79-91
Number of pages13
JournalScandinavian Journal of Psychology
Volume50
Issue number1
DOIs
StatePublished - Feb 2009

Fingerprint

Dyslexia
Reading
Word Processing
Parietal Lobe
Brain
Temporal Lobe
Research Design
Magnetic Resonance Imaging
Control Groups
Child Health
Literacy
Activation
Brain Activation
Children's Health
Orthographic

Keywords

  • At-risk
  • Brain
  • Dyslexia
  • FMRI
  • Language disorders
  • Reading acquisition

ASJC Scopus subject areas

  • Psychology(all)

Cite this

Brain activation on pre-reading tasks reveals at-risk status for dyslexia in 6-year-old children : Health and Disability. / Specht, Karsten; Hugdahl, Kenneth; Ofte, Sonja; NygÅrd, Merethe; BjØrnerud, Atle; Plante, Elena M; Helland, Turid.

In: Scandinavian Journal of Psychology, Vol. 50, No. 1, 02.2009, p. 79-91.

Research output: Contribution to journalArticle

Specht, Karsten ; Hugdahl, Kenneth ; Ofte, Sonja ; NygÅrd, Merethe ; BjØrnerud, Atle ; Plante, Elena M ; Helland, Turid. / Brain activation on pre-reading tasks reveals at-risk status for dyslexia in 6-year-old children : Health and Disability. In: Scandinavian Journal of Psychology. 2009 ; Vol. 50, No. 1. pp. 79-91.
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