Cortical responses of infants with and without a genetic risk for dyslexia: II. Group effects.
Infants born to families with a background of developmental dyslexia have an increased risk of becoming dyslexic. In our previous study no major group or stimulus effects in the event-related potentials (ERPs) of at-risk and control infants were found until the age of 6 months. However, in the current study, when we made the stimulus presentation rate slower, the ERPs to the short deviant /ka/ were different from those to the long standard /kaa/ stimulus already in newborns. In addition, clear group differences in the ERPs were found. The results demonstrate that infants born with a high familial risk for dyslexia process speech/auditory stimulus durations differently from control infants at birth.
D000161:Acoustic Stimulation / Q000379:methods; D002540:Cerebral Cortex / Q000503:physiopathology; D004410:Dyslexia / Q000235:genetics*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010700:Phonetics; D012016:Reference Values; D012307:Risk Factors; D013997:Time Factors