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Prolonged brainstem transmission time in autism.

B F Skoff, A F Mirsky, D Turner

    Psychiatry Research
    |May 1, 1980
    PubMed
    Summary
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    This study found prolonged brainstem auditory evoked potentials (BAEPs) in children with autism, indicating auditory pathway differences. These findings suggest potential neurological underpinnings in autism spectrum disorder.

    Area of Science:

    • Neuroscience
    • Developmental Psychology
    • Audiology

    Background:

    • Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition.
    • Auditory processing differences are frequently reported in individuals with ASD.
    • Standard audiometry may not detect subtle auditory pathway abnormalities.

    Purpose of the Study:

    • To investigate auditory pathway function in institutionalized children with autism using Brainstem Auditory Evoked Potentials (BAEPs).
    • To compare BAEPs in autistic children with age-matched neurotypical controls.
    • To identify specific electrophysiological abnormalities in the autistic group.

    Main Methods:

    • BAEPs were recorded in response to monaural click stimuli in 16 children diagnosed with autism and 20 typically developing children.

    Related Experiment Videos

  • Participants had no hearing loss confirmed by standard audiometry.
  • Brainstem transmission time (BAEP interpeak I-V latency) was analyzed.

    • Main Results:

    • Autistic children showed significantly prolonged average BAEP interpeak I-V latency on both left and right sides compared to controls.
    • Electrophysiological data were abnormal in 56% (9 out of 16) of the autistic children.
    • The most frequent abnormality observed was prolonged interpeak III-V latency on the left side.

    Conclusions:

    • The findings suggest delayed neural transmission within the auditory brainstem pathways in a significant proportion of children with autism.
    • BAEPs can reveal electrophysiological abnormalities not detected by standard hearing tests in autism.
    • These auditory pathway differences may contribute to the sensory processing challenges experienced in autism spectrum disorder.