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Auditory evoked potentials from the human cochlea and brainstem

T W Picton, D R Stapells, K B Campbell

    The Journal of Otolaryngology. Supplement
    |August 1, 1981
    PubMed
    Summary
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    Auditory evoked potentials from the cochlea and brainstem are recordable from the scalp. This study details the anatomical and physiological principles influencing these brainstem auditory evoked potentials.

    Area of Science:

    • Neuroscience
    • Audiology
    • Physiology

    Background:

    • Auditory evoked potentials (AEPs) originate in the cochlea and brainstem.
    • These potentials are measurable on the human scalp with short latencies (<15 ms) and low amplitudes (<2 microV).
    • Averaging techniques facilitate AEP recording, requiring careful control of amplifier-filter settings and electrode placement.

    Purpose of the Study:

    • To explore the anatomical and physiological basis of scalp-recorded auditory evoked potentials.
    • To elucidate the relationship between stimulus parameters and AEP characteristics.
    • To understand the influence of subject-specific factors on AEPs.

    Main Methods:

    • Recording of auditory evoked potentials from the human scalp.
    • Utilizing signal averaging techniques for signal-to-noise enhancement.

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  • Careful selection of amplifier-filter band-pass and electrode positioning.

    • Main Results:

    • AEPs are precisely modulated by stimulus intensity and frequency.
    • Subject parameters, including age and sex, significantly influence AEPs.
    • The study establishes the link between physiological principles and observed AEPs.

    Conclusions:

    • Scalp-recorded AEPs provide valuable insights into auditory pathway function.
    • Understanding the underlying anatomical and physiological principles is crucial for accurate interpretation of AEPs.
    • AEPs are sensitive indicators of auditory system integrity, influenced by both external stimuli and individual characteristics.