Uncovering auditory evoked potentials form cochlear implant users with independent component analysis


Viola, F.C., Thorne, J.D., Bleeck, S., Eyles, J.E. and Debener, S. (2011) Uncovering auditory evoked potentials form cochlear implant users with independent component analysis. Psychophysiology, 48, (11), 1470-1480. (doi:10.1111/j.1469-8986.2011.01224.x).

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Description/Abstract

Auditory evoked potentials (AEPs) provide an objective measure of auditory cortical function, but AEPs from cochlear implant (CI) users are contaminated by an electrical artifact. Here, we investigated the effects of electrical artifact attenuation on AEP quality. The ability of independent component analysis (ICA) in attenuating the CI artifact while preserving the AEPs was evaluated. AEPs recovered from CI users were systematically correlated with age, demonstrating that individual differences were well preserved. CI users with high-quality AEPs were characterized by a significantly shorter duration of deafness. Finally, a simulation study revealed very high spatial correlations between original and recovered normal hearing AEPs (r>.95) that were previously contaminated with CI artifacts. The results confirm that after ICA, good quality AEPs can be recovered, facilitating the objective, noninvasive study of auditory cortex function in CI users.

Item Type: Article
ISSNs: 0048-5772 (print)
1469-8986 (electronic)
Keywords: AEP,ICA,individual differences,cochlear implant,brain plasticity
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
R Medicine > RF Otorhinolaryngology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Human Sciences
ePrint ID: 334968
Date Deposited: 08 Mar 2012 14:30
Last Modified: 27 Mar 2014 20:19
URI: http://eprints.soton.ac.uk/id/eprint/334968

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