Maturation of speech-elicited event-related potentials from birth to 28 months: Typical development with minor...

Area of Science:

• Neuroscience
• Developmental Psychology
• Auditory Neuroscience

Background:

• Auditory event-related potentials (ERPs) are crucial for understanding infant auditory development.
• Longitudinal studies tracking ERP maturation in relation to developmental risks like dyslexia are essential.
• Early auditory processing differences may predict later neurodevelopmental outcomes.

Purpose of the Study:

• To longitudinally investigate the maturation of obligatory auditory ERPs in infants and early childhood.
• To compare developmental trajectories of auditory ERPs in infants with and without familial risk for dyslexia.
• To assess the impact of a music listening intervention on infant auditory ERPs.

Main Methods:

• Longitudinal recording of auditory ERPs (P1, N2) at birth, 6 months, and 28 months in approximately 200 children.
• Inclusion of a cohort over-represented by children at familial risk for developmental dyslexia.
• Assessment of a music listening intervention's effect on ERPs.

Main Results:

• Infant P1 and N2 were the most robust ERPs in early childhood.
• A distinct infant P1 response was present at birth, with an infant P1-N2 pattern by 6 months.
• Infants at familial risk for dyslexia showed smaller infant N2 amplitudes at 6 months compared to controls; music intervention had no effect.

Conclusions:

• Auditory ERP maturation follows specific developmental patterns in infancy and early childhood.
• Familial dyslexia risk is associated with altered early auditory processing.
• These findings provide a reference for auditory development and inform future research on clinical populations.