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Auditory neuropathy in childhood

K J Doyle1, Y Sininger, A Starr

  • 1University of California Irvine, 92717, USA.

The Laryngoscope
|September 17, 1998
PubMed
Summary
This summary is machine-generated.

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Pediatric auditory neuropathy involves hearing loss with normal outer hair cell function but abnormal auditory brainstem responses. This indicates eighth nerve damage, distinct from typical sensorineural hearing loss.

Area of Science:

  • Audiology
  • Neuroscience
  • Pediatrics

Background:

  • Auditory neuropathy is a disorder characterized by hearing loss, disproportionately poor speech discrimination, abnormal auditory brainstem responses, and intact outer hair cell function.
  • This condition suggests a lesion affecting the auditory nerve (eighth nerve).

Purpose of the Study:

  • To describe the audiologic findings in eight pediatric patients diagnosed with auditory neuropathy.
  • To highlight the clinical presentation and implications for management.

Main Methods:

  • Retrospective review of audiologic test results from eight children with auditory neuropathy.
  • Tests included pure tone audiometry, speech audiometry, auditory brainstem response (ABR), and otoacoustic emissions (OAEs).

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Main Results:

  • Audiologic testing revealed varied pure tone hearing loss configurations and generally poor speech discrimination.
  • All subjects exhibited normal otoacoustic emissions, confirming normal outer hair cell function.
  • All eight children had absent or significantly abnormal auditory brainstem responses, indicating neural pathway dysfunction.

Conclusions:

  • Auditory neuropathy in children is characterized by normal cochlear outer hair cell function with auditory nerve pathway abnormalities.
  • Advances in otoacoustic emissions testing aid in differentiating neural from sensory hearing loss.
  • Awareness of auditory neuropathy is crucial for otolaryngologists, as its management differs from sensorineural hearing loss.