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Related Experiment Videos

Auditory brainstem response abnormalities in autistic children

M J Taylor, B Rosenblatt, L Linschoten

    The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques
    |November 1, 1982
    PubMed
    Summary

    Auditory Brainstem Responses (ABRs) reveal significant brainstem dysfunction and a high incidence of hearing loss in autistic children. Routine ABR testing is recommended for early detection and intervention.

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    Area of Science:

    • Neuroscience
    • Developmental Pediatrics
    • Audiology

    Background:

    • Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition.
    • Previous research suggests potential brainstem dysfunction and auditory processing issues in autistic individuals.
    • Clarifying these aspects is crucial for understanding ASD etiology and improving interventions.

    Purpose of the Study:

    • To investigate Auditory Brainstem Responses (ABRs) in autistic children.
    • To assess brainstem auditory pathway function and hearing thresholds.
    • To correlate ABR findings with autism diagnosis and associated features.

    Main Methods:

    • Studied 32 children meeting diagnostic criteria for autism.
    • Recorded ABRs using click stimuli between Cz and the ipsilateral ear.

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  • Analyzed interwave latencies (I-III, I-V) and determined auditory thresholds.

    • Main Results:

    • 11 children had moderate hearing loss (8 bilateral); 3 had severe to profound bilateral hearing loss.
    • 8 of 14 children with hearing loss had additional features like perinatal encephalopathy.
    • Significantly longer I-III and I-V interwave latencies were observed in autistic children, indicating delayed auditory brainstem pathway conduction.

    Conclusions:

    • ABR abnormalities, particularly in early auditory pathway conduction, are confirmed in autistic children.
    • A high incidence of hearing loss in this population is a significant finding.
    • Routine ABR testing is recommended for autistic children to identify auditory deficits.