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Reference data for ABRs in retrocochlear diagnosis.

C Elberling, J Parbo

    Scandinavian Audiology
    |January 1, 1987
    PubMed
    Summary
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    Auditory brainstem response (ABR) intervals differ by sex, increasing with age and decreasing with hearing loss. These findings aid in understanding ABR variations in neurologically normal individuals.

    Area of Science:

    • Neuroscience
    • Audiology
    • Otolaryngology

    Background:

    • Auditory brainstem responses (ABRs) are crucial for assessing auditory pathway function.
    • Understanding normative ABR values is essential for diagnosing hearing impairments.
    • Factors like age, sex, and hearing loss can influence ABR parameters.

    Purpose of the Study:

    • To analyze auditory brainstem response wave latencies and intervals (I-III, I-V) in neurologically normal individuals.
    • To investigate the influence of sex, age, and high-frequency hearing loss on ABR parameters.
    • To establish normative data and identify potential correlations between these factors.

    Main Methods:

    • Retrospective analysis of ABR data from 484 neurologically normal patients (235 female, 249 male).

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  • Comparison of wave latencies and I-III, I-V intervals against sex, age, and high-frequency hearing loss.
  • Multiple regression analysis to account for the correlation between age and hearing loss.

    • Main Results:

    • Both I-III and I-V intervals showed significant differences based on sex, with females exhibiting shorter latencies.
    • Intervals increased with age and decreased with high-frequency hearing loss, with adjustments made for age and hearing loss.
    • The I-III interval's dependence on hearing loss was primarily observed in males; electrocochleography confirmed wave I latency accuracy.

    Conclusions:

    • Sex, age, and high-frequency hearing loss are significant factors influencing auditory brainstem response intervals.
    • Normative ABR data adjusted for these parameters can improve diagnostic accuracy.
    • The study provides valuable insights into the neurophysiological basis of auditory processing across different demographics.