Developmental dyslexia: Passive visual stimulation provides no evidence for a magnocellular processing defect

Sönke Johannes, Clifton L. Kussmaul, Thomas F. Münte, George R Mangun

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Livingstone et al. presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia.

Original languageEnglish (US)
Pages (from-to)1123-1127
Number of pages5
JournalNeuropsychologia
Volume34
Issue number11
DOIs
StatePublished - Nov 1996

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Photic Stimulation
Dyslexia
Visual Evoked Potentials
Control Groups

Keywords

  • Developmental dyslexia
  • Human
  • Magnocellular pathway
  • Visual evoked potentials (VEP)

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Neuropsychology and Physiological Psychology

Cite this

Developmental dyslexia : Passive visual stimulation provides no evidence for a magnocellular processing defect. / Johannes, Sönke; Kussmaul, Clifton L.; Münte, Thomas F.; Mangun, George R.

In: Neuropsychologia, Vol. 34, No. 11, 11.1996, p. 1123-1127.

Research output: Contribution to journalArticle

Johannes, Sönke ; Kussmaul, Clifton L. ; Münte, Thomas F. ; Mangun, George R. / Developmental dyslexia : Passive visual stimulation provides no evidence for a magnocellular processing defect. In: Neuropsychologia. 1996 ; Vol. 34, No. 11. pp. 1123-1127.
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