Brain activity while reading words and pseudo-words: A comparison between dyslexic and fluent readers

Shelley Shaul, Yossi Arzouan, Abraham Goldstein

Research output: Contribution to journalArticlepeer-review

Abstract

In recent years many studies have focused on brain activity differences between fluent and dyslexic readers in order to understand the neural basis of dyslexia. The aim of the current study was to examine the processing of words and pseudo-words in the two hemispheres among dyslexic as compared to fluent readers, using behavioral, and electrophysiological source estimation measures. Two matched groups of university students, fluent and dyslexic readers, performed a lexical decision task in order to examine the processes of word recognition. Dyslexic readers showed overall less activity than fluent readers, mainly during late processing stages. In addition, the distinctive patterns of activity for words and pseudo-words displayed by fluent readers were not apparent in dyslexic readers. In particular, the increased activation of left-hemisphere language areas found in response to pseudo-words was absent in dyslexics. These findings are further evidence of orthographic and phonological impairments in dyslexia.

Original languageEnglish
Pages (from-to)270-276
Number of pages7
JournalInternational Journal of Psychophysiology
Volume84
Issue number3
DOIs
StatePublished - Jun 2012

Keywords

  • Dyslexia
  • Hemispheric activity
  • Pseudo-words
  • Words

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Physiology (medical)
  • General Neuroscience

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