Cortical auditory evoked potentials as an objective measure of behavioral thresholds in cochlear implant users
Anisa S Visram, Hamish Innes-Brown, Wael El-Deredy, Colette M McKay
Hearing Research | ELSEVIER SCIENCE BV | Published : 2015
The aim of this study was to assess the suitability of using cortical auditory evoked potentials (CAEPs) as an objective tool for predicting behavioral hearing thresholds in cochlear implant (CI) users. Nine experienced adult CI users of Cochlear(™) devices participated. Behavioral thresholds were measured in CI users across apical, mid and basal electrodes. CAEPs were measured for the same stimuli (50 ms pulse trains of 900-pps rate) at a range of input levels across the individual's psychophysical dynamic range (DR). Amplitude growth functions using global field power (GFP) were plotted, and from this the CAEP thresholds were extrapolated and compared to the behavioral thresholds. Increase..View full abstract
Thanks to Betsi Cadwaladr University Health Board, The University of Manchester and Cochlear (TM) for providing funding in support of this project. Thanks to all participants for their generously donated time. The Bionics Institute acknowledges the support it receives from the Victorian Government, Australia through its Operational Infrastructure Support Program.