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Learning disability assessed through audiologic and physiologic measures: a case study.

E R Greenblatt, A Bar, R A Zappulla

    Journal of Communication Disorders
    |September 1, 1983
    PubMed
    Summary
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    This study reports a child with central auditory dysfunction, showing brain-stem issues but normal cortical function. Specific electrophysiologic changes in brain-stem auditory-evoked responses (BAERs) were observed, correlating with audiologic findings.

    Area of Science:

    • Neuroscience
    • Audiology
    • Pediatric Neurology

    Background:

    • Central auditory dysfunction can present with varied etiologies.
    • Distinguishing between brain-stem and cortical auditory processing deficits is crucial for diagnosis.
    • Electrophysiologic testing offers objective measures of auditory pathway integrity.

    Observation:

    • A pediatric case presented with central auditory dysfunction.
    • Audiologic evaluations, including the Willeford Battery and Staggered Spondaic Word Test, suggested brain-stem dysfunction.
    • Cortical functioning was assessed as normal via these tests.

    Findings:

    • Electrophysiologic testing, specifically brain-stem auditory-evoked responses (BAERs), corroborated the audiologic findings.
    • An absent contralateral peak III was observed bilaterally in BAERs during separate ear stimulation.

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  • This marks the first reported instance linking specific BAER electrophysiologic changes to audiologic indicators of brain-stem dysfunction.

    • Implications:

    • This case highlights the utility of integrating audiologic and electrophysiologic data for precise localization of auditory pathway lesions.
    • The findings may refine diagnostic criteria for central auditory processing disorders originating in the brain-stem.
    • Further research could explore the clinical significance and long-term outcomes associated with this specific BAER pattern.