[Registering event-related auditory potentials (P300) in patients with cochlear implants].
Event-related auditory evoked potentials can contribute to the evaluation of discrimination abilities of cochlear implant users. Auditory P300 potentials to a frequency contrast were obtained in six post-lingually deaf adults using a cochlear implant and in a control group of normal hearing subjects. The aim of this study was to investigate how these potentials were determined by the stimulation pattern of the cochlear implant. To visualise these stimulation patterns colour-coded plots (stimulograms) were calculated based on the stimulus and the fitting file of the individual subject as inputs. These stimulograms were used to evaluate the influence of various stimulation parameters on the stimulation contrast used in an oddball paradigm. The influence of discrimination difficulty on the P300 response is demonstrated.
Mühler
Roland
R
Abteilung für Experimentelle Audiologie und Medizinische Physik, Otto-von-Guericke-Universität Magdeburg. muehler@med.uni-magdeburg.de
Ziese
Michael
M
von Specht
Hellmut
H
D000328:Adult; D003054:Cochlear Implants; D004192:Discrimination, Psychological; D004558:Electric Stimulation; D004594:Electrophysiology / Q000379:methods; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D015203:Reproducibility of Results