The Effect of Advancing Age on Auditory Middle- and Long-Latency Evoked Potentials Using a Steady-State-Response...

Area of Science:

• Auditory Neuroscience
• Neurophysiology
• Gerontology

Background:

• Auditory steady-state responses (ASSRs) are objective measures of auditory function.
• Understanding age-related changes in ASSRs is crucial for audiological assessments.

Purpose of the Study:

• To investigate age-specific alterations in equivalent auditory steady-state responses (ASSRs).
• To examine the influence of repetition rate and age on ASSRs, correlating them with transient auditory evoked potentials.

Main Methods:

• 48 healthy adults were divided into three age groups (20-39, 40-59, 60-79 years).
• ASSRs were recorded using tone burst stimuli at seven repetition rates (40 Hz to 0.75 Hz).
• Temporal and spectral analyses were performed on middle- and long-latency equivalent ASSRs.

Main Results:

• No significant changes in the magnitude or spectral content of equivalent ASSRs were observed across age groups.
• The harmonic sum of the responses remained consistent across different age groups.
• Advancing age did not substantially affect the spectral content of the response at each repetition rate.

Conclusions:

• Advancing age does not influence long-latency equivalent ASSRs.
• Aging impacts middle-latency equivalent ASSRs, particularly when significant age differences (≥ 40 years) are present.