Auditory neuropathy/dys-synchrony and its perceptual consequences

Trends Amplif. 2005;9(1):1-43. doi: 10.1177/108471380500900102.


Auditory neuropathy/dys-synchrony is a form of hearing impairment in which cochlear outer hair cell function is spared but neural transmission in the auditory pathway is disordered. This condition, or group of conditions with a common physiologic profile, accounts for approximately 7% of permanent childhood hearing loss and a significant (but as yet undetermined) proportion of adult impairment. This paper presents an overview of the mechanisms underlying auditory neuropathy/dys-synchrony-type hearing loss and the clinical profile for affected patients. In particular it examines the perceptual consequences of auditory neuropathy/dys-synchrony, which are quite different from those associated with sensorineural hearing loss, and considers currently available, and future management options.

Publication types

  • Review

MeSH terms

  • Adult
  • Auditory Pathways / physiopathology
  • Auditory Perceptual Disorders / etiology*
  • Auditory Perceptual Disorders / physiopathology*
  • Auditory Perceptual Disorders / rehabilitation
  • Brain Stem / physiopathology
  • Cochlear Implants
  • Cochlear Microphonic Potentials / physiology
  • Cochlear Nerve / pathology
  • Cochlear Nerve / physiopathology
  • Contraindications
  • Evoked Potentials, Auditory, Brain Stem / physiology
  • Hair Cells, Auditory / pathology
  • Hair Cells, Auditory / physiopathology
  • Hearing Aids / adverse effects
  • Hearing Loss, Central / etiology*
  • Hearing Loss, Central / physiopathology*
  • Hearing Loss, Central / rehabilitation
  • Humans
  • Myelin Sheath / pathology
  • Otoacoustic Emissions, Spontaneous / physiology
  • Reflex, Abnormal
  • Retrograde Degeneration
  • Speech Perception