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A Method for Tracking the Time Evolution of Steady-State Evoked Potentials
Published on: May 25, 2019
Maturational changes in the human envelope-following responses
Eleina Mijares Nodarse1, María C Pérez Abalo, Alejandro Torres Fortuny
1Departamento de Audición y Lenguaje, Centro de Neurociencias de Cuba, La Habana, Cuba.
Acta Otorrinolaringologica Espanola
|March 17, 2012
Summary
Envelope-following responses (EFRs) mature significantly in infants during their first two years. This maturation impacts EFR amplitude and detectability, crucial for understanding auditory processing in young children.
Area of Science:
- Auditory Neuroscience
- Developmental Audiology
- Speech Perception
Background:
- Auditory temporal processing is vital for speech comprehension.
- Envelope-following responses (EFRs) objectively measure auditory temporal processing.
- EFRs are essential for evaluating individuals unable to provide behavioral responses, such as infants.
Purpose of the Study:
- To investigate age-dependent changes in EFRs during the first two years of life.
- To establish normative data for EFR development in infants.
Main Methods:
- EFRs were recorded in 16 healthy infants (12 newborns, 4 two-year-olds).
- Stimuli included white noise carriers with modulated frequencies (20-200 Hz) at 50 dB HL.
- Analysis focused on EFR morphology and detectability across modulation frequencies.
Main Results:
- Significant age-related changes were observed in EFR morphology and detectability.
- The P1 component was less defined below 50 Hz in both age groups.
- EFR amplitude and detectability were significantly influenced by age across all tested frequencies.
Conclusions:
- This study presents the first evidence of EFR maturation in human infants.
- Understanding normal EFR development is key to utilizing this technique for objective auditory assessment in infants.
- Findings support the use of EFRs for evaluating auditory temporal processing in non-responsive infants.
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