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Related Experiment Videos

Evoked cerebral potential audiometry and hearing threshold.

T S Prevec, S Cernelc, K Ribaric

    Audiology : Official Organ of the International Society of Audiology
    |January 1, 1976
    PubMed
    Summary

    Nonspecific evoked cerebral potential (NECP) audiometry showed higher hearing thresholds than subjective audiograms in children. Differences may stem from distinct functional systems, suggesting amplitude evaluation to improve NECP diagnostic accuracy.

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    Area of Science:

    • Audiology
    • Neuroscience
    • Pediatric Medicine

    Background:

    • Audiometric testing is crucial for diagnosing hearing loss in children.
    • Nonspecific evoked cerebral potential (NECP) audiometry offers an objective measure of hearing.
    • Discrepancies between objective and subjective hearing tests can complicate diagnosis.

    Purpose of the Study:

    • To compare hearing thresholds obtained via NECP audiometry and subjective tonal audiometry in children.
    • To investigate the reasons for discrepancies between these two audiometric methods.
    • To propose methods for improving the diagnostic value of NECP audiometry.

    Main Methods:

    • Audiometric testing using nonspecific evoked cerebral potential (NECP) was conducted on 20 children.
    • Participants included children with normal hearing, conductive hearing loss, and sensorineural hearing loss.

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  • Results were compared with established subjective tonal audiogram thresholds.

    • Main Results:

    • NECP audiometry thresholds were generally 20-30 dB higher than subjective audiogram thresholds in most children.
    • A larger discrepancy (up to 70 dB) was observed in two cases.
    • No significant differences in discrepancy were noted across the different hearing loss groups.

    Conclusions:

    • The discrepancy between NECP and subjective audiometry may arise from evaluating different functional systems (brainstem activating system vs. auditory pathway).
    • Different thresholds between these systems are a likely cause of the observed differences.
    • Routine assessment of NECP amplitude from somatosensory stimuli is proposed to mitigate false negatives in children with low NECP amplitude.
    • Careful data evaluation can enhance the diagnostic utility of NECP audiometry in pediatric audiology.