Does IQ affect the functional brain network involved in pseudoword reading in students with reading disability? A magnetoencephalography study

Panagiotis G. Simos, Roozbeh Rezaie, Andrew Papanicolaou, Jack M. Fletcher

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The study examine whether individual differences in performance and verbal IQ affect the profiles of reading-related regional brain activation in 127 students experiencing reading difficulties and typical readers Using magnetoencephalography in a pseudoword read-aloud task, we compared brain activation profiles of students experiencing word-level reading difficulties who did (n=29) or did not (n=36) meet the IQ-reading achievement discrepancy criterion Typical reader sassigned to a lower-IQ (n=18) or a higher IQ (n=44) subgroup serveda scontrols Minimum norm estimates of regional cortical activity revealed that the degree of hypoactivation in the left superior temporal and supramarginal gyri in both RD subgroups was not affected by IQ Moreover, IQ did not moderate the positive association between degree of activation in the left fusiform gyrus and phonological decoding ability We did find, however, that the hypoactivation of the left pars opercularis in RD was restricted to lower-IQ participants In accordance with previous morphometric and fMRI studies, degree of activity in inferior rontal, and inferior parietal regions correlated with IQ across reading ability subgroups Results are consistent with current views questioning the relevance of IQ-discrepancy criteria in the diagnosis of dyslexia.

Original languageEnglish (US)
Article number932
JournalFrontiers in Human Neuroscience
Volume7
Issue numberJAN
DOIs
StatePublished - Jan 8 2014

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Magnetoencephalography
Reading
Students
Brain
Parietal Lobe
Aptitude
Temporal Lobe
Dyslexia
Individuality
Magnetic Resonance Imaging

All Science Journal Classification (ASJC) codes

  • Neuropsychology and Physiological Psychology
  • Neurology
  • Psychiatry and Mental health
  • Biological Psychiatry
  • Behavioral Neuroscience

Cite this

Does IQ affect the functional brain network involved in pseudoword reading in students with reading disability? A magnetoencephalography study. / Simos, Panagiotis G.; Rezaie, Roozbeh; Papanicolaou, Andrew; Fletcher, Jack M.

In: Frontiers in Human Neuroscience, Vol. 7, No. JAN, 932, 08.01.2014.

Research output: Contribution to journalArticle

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