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Auditory brainstem response and behavioral audiometry. Developmental correlates

K Kaga, Y Tanaka

    Archives of Otolaryngology (Chicago, Ill. : 1960)
    |September 1, 1980
    PubMed
    Summary

    Auditory brainstem evoked responses (ABRs) and behavioral audiometry show improved hearing sensitivity with age in children. These auditory development trends provide crucial normative data for audiological and neurological assessments.

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    Area of Science:

    • Audiology
    • Neuroscience
    • Developmental Pediatrics

    Background:

    • Auditory development in infants and children is critical for speech and language acquisition.
    • Establishing normative data for auditory function is essential for diagnosing hearing impairments.
    • Auditory brainstem evoked responses (ABRs) and behavioral audiometry are key tools for assessing auditory pathways.

    Purpose of the Study:

    • To establish normative data for auditory brainstem evoked responses (ABRs) and behavioral audiometry in normal-hearing subjects across different age groups.
    • To investigate the developmental correlates between ABRs and behavioral hearing sensitivity.
    • To provide reference standards for audiological and neurological applications.

    Main Methods:

    • Studied 112 normal-hearing subjects: 78 infants (1-18 months), 24 children (2-5 years), and 10 adults (18-22 years).

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  • Measured auditory thresholds using ABRs (minimum stimulus intensities evoking wave V) and behavioral audiometry.
  • Analyzed peak latencies and response functions for both methods.

    • Main Results:

    • ABR thresholds and behavioral sensitivity improved (decreased thresholds) with age, with neonates having the highest thresholds and adults the lowest.
    • Response functions from both methods converged with age, crossing between 2 and 3 years.
    • A trend for decreasing peak latencies with age was observed, particularly for later ABR components.

    Conclusions:

    • Hearing sensitivity, assessed by both ABRs and behavioral audiometry, demonstrates significant development from infancy through childhood.
    • The convergence of ABR and behavioral measures indicates maturation of the auditory system.
    • These findings provide valuable normative data for the audiological and neurological evaluation of pediatric populations.