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Auditory neuropathy

A Starr1, T W Picton, Y Sininger

  • 1Department Neurology, University of California, Irvine 92717, USA.

Brain : a Journal of Neurology
|June 1, 1996
PubMed
Summary
This summary is machine-generated.

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Hearing loss in ten young patients suggests auditory nerve disorders, not cochlear damage. This auditory neuropathy may be linked to peripheral neuropathy, impacting speech intelligibility.

Area of Science:

  • Neuroscience
  • Audiology
  • Genetics

Background:

  • Hearing impairments in children and young adults can stem from various causes.
  • Distinguishing cochlear from retrocochlear pathologies is crucial for diagnosis and treatment.
  • Auditory nerve disorders, or auditory neuropathies, present unique audiological challenges.

Purpose of the Study:

  • To investigate the audiological characteristics of patients with suspected auditory nerve dysfunction.
  • To explore the potential link between auditory nerve disorders and peripheral neuropathy.
  • To differentiate auditory neuropathy from cochlear hearing loss based on physiological and behavioral tests.

Main Methods:

  • Behavioral and physiological testing, including otoacoustic emissions and auditory brainstem responses.

Related Experiment Videos

  • Auditory brainstem reflex testing (middle ear muscle reflexes, crossed suppression of OAEs).
  • Behavioral audiometry and speech intelligibility assessments.

    • Main Results:

    • Preserved otoacoustic emissions and cochlear microphonics indicated normal cochlear outer hair cell function.
    • Auditory brainstem potentials were absent or severely distorted, implicating the auditory nerve (VIII cranial nerve).
    • Eight patients later developed peripheral neuropathy, either hereditary or sporadic.

    Conclusions:

    • The hearing impairment is likely due to auditory nerve dysfunction, not cochlear damage.
    • Auditory neuropathy may be caused by isolated auditory nerve issues or a broader neuropathic process.
    • Peripheral neuropathy is a potential underlying cause or associated condition in auditory neuropathy.