Cortical basis for dichotic pitch perception in developmental dyslexia

Marita Partanen, Kevin Fitzpatrick, Burkhard Mädler, Dorothy Edgell, Bruce Bjornson, Deborah E. Giaschi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The current study examined auditory processing deficits in dyslexia using a dichotic pitch stimulus and functional MRI. Cortical activation by the dichotic pitch task occurred in bilateral Heschl's gyri, right planum temporale, and right superior temporal sulcus. Adolescents with dyslexia, relative to age-matched controls, illustrated greater activity in left Heschl's gyrus for random noise, less activity in right Heschl's gyrus for all auditory conditions, and less activity in right superior temporal sulcus for a dichotic melody. Subsequent analyses showed that these group differences were attributable to dyslexic readers who performed poorly on the psychophysical task. Furthermore, behavioral performance on phonological reading was correlated to activity from dichotic conditions in right Heschl's gyrus and right superior temporal sulcus. It is postulated that these differences between reader groups is primarily due to a noise exclusion deficit shown previously in dyslexia.

Original languageEnglish
Pages (from-to)104-112
Number of pages9
JournalBrain and Language
Issue number2
Publication statusPublished - Nov 2012
Externally publishedYes


  • Auditory perception
  • Dyslexia
  • Functional magnetic resonance imaging
  • Phonological processing
  • Temporal processing


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