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Age-related changes in human middle latency auditory evoked potentials.
Electroencephalography and Clinical Neurophysiology
|July 1, 1986
Summary
Elderly individuals show prolonged and enhanced auditory evoked potentials (Pa component) compared to younger adults. These changes reflect age-related central auditory processing modifications.
Area of Science:
- Neuroscience
- Audiology
- Gerontology
Background:
- Auditory processing undergoes changes with aging.
- Middle latency auditory evoked potentials (MAEPs) offer insights into auditory pathway function.
Purpose of the Study:
- To investigate age-related differences in MAEPs.
- To examine the Pa component's latency and amplitude in young and elderly subjects.
Main Methods:
- MAEPs were recorded in young (20-40 years) and elderly (60-80 years) participants with normal hearing.
- Pa and Na components, as well as binaural interaction, were analyzed.
Main Results:
- The Pa component showed prolonged latency and increased amplitude in elderly subjects.
- No significant changes were observed in the Na component or binaural interaction.
- Age-related Pa changes persisted even when auditory thresholds and stimulus intensity were controlled.
Conclusions:
- Age-related modifications in central auditory processing significantly affect the Pa component of MAEPs.
- The enhanced Pa amplitude suggests central neural changes rather than peripheral hearing loss.