Quantitative analysis of electrically evoked auditory brainstem responses in implanted children with auditory neuropathy/dyssynchrony

Christina L. Runge-Samuelson, Sarah Drake, P. Ashley Wackym

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


OBJECTIVE: Cochlear implantation is a common treatment approach for children with auditory neuropathy/dyssynchrony (AN/AD) who do not benefit from hearing aids. The auditory brainstem response (ABR) is a measure of neural synchrony along the auditory pathway up through the brainstem. By definition, acoustically evoked ABR is absent in AN/AD, however, ABR can be elicited by electrical stimulation through the cochlear implant (electrically evoked ABR [EABR]). Reports of EABR with AN/AD to date have been primarily descriptive in nature. The objective of this study was to quantify EABR wave V measures in implanted children with and without AN/AD. STUDY DESIGN: Retrospective analysis of EABR waveforms from March 2000 through February 2005. SETTING: Comprehensive Cochlear Implant Program/Tertiary Referral Center. PATIENTS: Pediatric cochlear implant users of two etiologic groups: congenital AN/AD (n = 5) and other congenital profound sensorineural hearing loss (n = 27). INTERVENTION: Diagnostic. MAIN OUTCOME MEASURES: Intraoperative EABR wave V threshold, suprathreshold amplitude, and latency measures were compared between groups. RESULTS: The EABR threshold and suprathreshold amplitude measures across the population were variable regardless of etiology. With some exceptions, a trend was observed for the AN/AD group that included average or below-average thresholds and below-average suprathreshold response amplitudes. CONCLUSION: Cochlear implantation can provide synchronous neural responses to auditory stimulation in AN/AD, as previously known. The quantification of EABR measures in this study indicates that subjects with AN/AD have sufficient neural sensitivity to electrical stimulation, however, they may experience less robust neural responses at suprathreshold levels. Given the heterogeneity of potential causes of AN/AD, however, caution needs to be applied when grouping this population for analyses.

Original languageEnglish (US)
Pages (from-to)174-178
Number of pages5
JournalOtology and Neurotology
Issue number2
StatePublished - Feb 2008

All Science Journal Classification (ASJC) codes

  • Otorhinolaryngology
  • Sensory Systems
  • Clinical Neurology


  • Auditory dyssynchrony
  • Auditory neuropathy
  • Cochlear implant
  • Electrically evoked auditory brainstem response


Dive into the research topics of 'Quantitative analysis of electrically evoked auditory brainstem responses in implanted children with auditory neuropathy/dyssynchrony'. Together they form a unique fingerprint.

Cite this