Brief Report: The Cochlear Microphonic as an Indication of Outer Hair Cell Function

@article{Withnell2001BriefRT,
  title={Brief Report: The Cochlear Microphonic as an Indication of Outer Hair Cell Function},
  author={Robert H. Withnell},
  journal={Ear and Hearing},
  year={2001},
  volume={22},
  pages={75-77}
}
The extra-cellular cochlear microphonic is believed to be generated predominantly by outer hair cells and therefore it would seem reasonable to assume that the presence of a cochlear microphonic excludes outer hair cell dysfunction. Indeed, a diagnosis of auditory neuropathy might be, and has been, made on the basis of a cochlear microphonic present with an abnormal auditory brainstem response. Animal studies, however, have shown that the cochlear microphonic recorded from the round window is… 

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Long-lasting, high frequency cochlear microphonics with amplitudes comparable to those obtained from CNS- ears were found in auditory neuropathy patients, which could result from a variable combination of afferent compartment lesion, efferent system dysfacilitation and loss of outer hair cells.

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Study of cochlear microphonic potentials in auditory neuropathy

Observations on mastoid versus ear canal recorded cochlear microphonic in newborns and adults.

Normative data collected in full-term newborns and adults with no known risk factors for cochlear or retrocochlear pathology suggest that the CM is easier to separate from stimulus artifact using an EC electrode and toneburst stimuli.

Frequency-Specific Electrocochleography Indicates that Presynaptic and Postsynaptic Mechanisms of Auditory Neuropathy Exist

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