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Related Experiment Video

Updated: Sep 4, 2025

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Characterizing subcutaneous cortical auditory evoked potentials in mice.

Olivier Postal1, Warren Bakay2, Typhaine Dupont2

  • 1Institut de l'Audition, Institut Pasteur, INSERM, Université Paris Cité, F-75012 Paris, France; Sorbonne Université, Collège Doctoral, F-75005 Paris, France.

Hearing Research
|July 21, 2022
PubMed
Summary

Cortical Auditory Evoked Potentials (CAEPs) offer a new way to measure higher auditory function in mice. This study developed a consistent method to record CAEPs, showing they can reliably detect changes in the auditory cortex.

Keywords:
Auditory brainstem responseCortical auditory evoked potential

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Sensory Systems

Background:

  • Auditory Brainstem Responses (ABRs) assess lower auditory pathways but miss thalamic and cortical deficits.
  • Cortical Auditory Evoked Potentials (CAEPs) reflect higher auditory processing but are variable and difficult to interpret, especially in rodent models.
  • Current diagnostic tools are limited in assessing higher-level auditory function.

Purpose of the Study:

  • To develop a consistent and reliable method for measuring subcutaneous CAEPs in mice.
  • To identify the optimal experimental parameters for recording CAEPs.
  • To determine the cortical origin of CAEPs.

Main Methods:

  • Investigated CAEPs using various auditory stimuli (noise, click, 16 kHz tone bursts).
  • Examined the impact of stimulus presentation rates (2, 6, 10 Hz) and electrode placements.
  • Utilized lidocaine to temporarily deactivate the auditory cortex to pinpoint the source of CAEPs.

Main Results:

  • Established an experimental paradigm yielding robust and replicable CAEPs in mice.
  • Demonstrated that the contralateral auditory cortex is the primary generator of CAEPs.
  • Showed that CAEPs can be consistently measured under optimized conditions.

Conclusions:

  • Subcutaneous CAEPs provide a viable method for assessing cortical auditory processing in mice.
  • This technique holds promise for diagnosing deficits in higher auditory areas.
  • CAEPs can serve as a valuable diagnostic tool for auditory cortex function.