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Auditory brainstem evoked potentials in sudden deafness.

A Wilder, H Pratt, G Rosen

    The Journal of Laryngology and Otology
    |July 1, 1987
    PubMed
    Summary
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    Auditory Brainstem Evoked Potentials (ABEP) reveal a central component in sudden deafness, showing abnormal effects of stimulus rate changes. This impairment may stem from reduced synaptic efficacy in the auditory pathway.

    Area of Science:

    • Neuroscience
    • Audiology
    • Otolaryngology

    Background:

    • Sudden deafness is an idiopathic hearing loss.
    • Auditory Brainstem Evoked Potentials (ABEP) assess auditory pathway function.
    • Central nervous system involvement in sudden deafness is not fully understood.

    Purpose of the Study:

    • To investigate the central auditory pathway in patients with sudden deafness using ABEP.
    • To correlate ABEP findings with clinical symptoms and psychoacoustic hearing thresholds.
    • To explore the impact of stimulus rate on ABEP in sudden deafness.

    Main Methods:

    • ABEP were recorded from 53 adult subjects with sudden deafness.
    • Stimuli included 75 dBHL clicks at 10/sec and 40/sec.
    • Analysis focused on peak latencies, interpeak latencies, and rate effects, compared to clinical data.

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    Main Results:

    • A significant correlation was found between ABEP detection and psychoacoustic hearing thresholds.
    • Differences between ABEP and psychoacoustic thresholds were insignificant.
    • Abnormal effects of increasing stimulus rate on ABEP were observed in patients.

    Conclusions:

    • Sudden deafness exhibits a central auditory nervous system component.
    • Altered ABEP rate effects suggest impaired central synaptic efficacy.
    • ABEP are valuable for assessing central function in sudden deafness.