Cortical responses of infants with and without a genetic risk for dyslexia: I. Age effects

We studied auditory event-related potentials (ERP) in newborns and 6-month-old infants, about half of whom had a familial risk for dyslexia. Syllables varying in vowel duration were presented in an oddball paradigm, in which ERPs to deviating stimuli are assumed to reflect automatic change detection...

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Bibliographic Details
Published inNeuroreport Vol. 10; no. 5; p. 901
Main Authors Pihko, E, Leppänen, P H, Eklund, K M, Cheour, M, Guttorm, T K, Lyytinen, H
Format Journal Article
LanguageEnglish
Published England 06.04.1999
Subjects
Acoustic Stimulation - methods
Aging - physiology
Cerebral Cortex - physiology
Dyslexia - genetics
Evoked Potentials, Auditory - physiology
Humans
Infant
Infant, Newborn
Phonetics
Reference Values
Risk Factors
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Summary:We studied auditory event-related potentials (ERP) in newborns and 6-month-old infants, about half of whom had a familial risk for dyslexia. Syllables varying in vowel duration were presented in an oddball paradigm, in which ERPs to deviating stimuli are assumed to reflect automatic change detection in the brain. The ERPs of newborns had slow positive deflections typical of their age, but significant stimulus and group effects were found only by the age of 6 months. In both groups, the responses to the deviant /ka/ were more positive than those to the standard /kaa/ stimuli, contrary to the findings of adult ERPs to duration changes. The results also suggested differences in brain activation pattern between the groups.
ISSN:0959-4965
DOI:10.1097/00001756-199904060-00002