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Thalamocortical Auditory Processing Across the Lifespan: A Study with Speech-Evoked Cortical Potentials.
Pamela Papile Lunardelo1, Marisa Tomoe Hebihara Fukuda2,3, Bianca Tonsic Carmona3
1Department of Specific Training in Speech-Language Pathology, Federal University of Fluminense, Rio de Janeiro, Brazil.
Clinical EEG and Neuroscience
|September 5, 2025
Summary
Healthy auditory processing shows stable neurophysiological changes from adolescence through age 59. Electrophysiological markers like P1/N1 latencies mature in youth but remain consistent into late adulthood.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Developmental Neuroscience
Background:
- Auditory aging involves neurophysiological changes affecting sound processing.
- Understanding these changes requires identifying electrophysiological markers across the lifespan.
- Cortical auditory evoked potentials (CAEPs) offer insights into auditory pathway function.
Purpose of the Study:
- To identify electrophysiological markers of auditory processing development, stability, and early aging.
- To elucidate neurophysiological changes in healthy auditory aging.
- To establish normative data for CAEPs in a wide age range.
Main Methods:
- Cross-sectional study of 149 healthy participants aged 7-59 years.
- CAEPs recorded using syllable /da/ with binaural stimulation (70 dB HL) and eye-movement control.
- Participants divided into six age groups for comparative analysis.
Main Results:
- Significant differences in P1 latency between children (7-11) and older participants (12-59).
- N1 latency differed between children and adults (30-59); N1 amplitude varied between adolescents (12-19) and 40-49 year olds.
- Age showed moderate negative correlation with P1/N1 latencies and weak positive correlation with N1 amplitude.
Conclusions:
- Maturational changes in P1/N1 latencies are evident during development.
- Auditory processing appears stable in healthy individuals until at least age 59.
- No significant decline in CAEPs was observed during adulthood or pre-senescence.
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