Minimization of cochlear implant stimulus artifact in cortical auditory evoked potentials.
OBJECTIVE
To compare two methods of minimizing cochlear implant artifact in cortical auditory evoked potential (CAEP) recordings.


METHODS
Two experiments were conducted. In the first, we assessed the use of independent component analysis (ICA) as a pre-processing filter. In the second, we explored the use of an optimized differential reference (ODR) for minimizing artifacts.


RESULTS
Both ICA and the ODR can minimize the artifact and allow measurement of CAEP responses.


CONCLUSIONS
When using a large number of recording electrodes ICA can be used to minimize the implant artifact. When using a single electrode montage an optimized differential reference is adequate to minimize the artifact.


CONCLUSIONS
The use of an optimized differential reference could allow cortical evoked potentials to be used in routine clinical assessment of auditory pathway development in children and adults fit with cochlear implants.
Gilley
Phillip M
PM
School of Behavioral and Brain Sciences, Callier Advanced Hearing Research Center, The University of Texas at Dallas, 1966 Inwood Road, 75235, USA. pgilley@utdallas.edu
Sharma
Anu
A
Dorman
Michael
M
Finley
Charles C
CC
Panch
Arunachalam S
AS
Martin
Kathryn
K
D016477:Artifacts; D001303:Auditory Cortex / Q000502:physiology*; D001931:Brain Mapping; D002648:Child; D002675:Child, Preschool; D003054:Cochlear Implants; D004566:Electrodes; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D006801:Humans