Source localization of auditory evoked potentials after cochlear implantation
Debener, Stefan, Hine, Jemma, Bleeck, Stefan and Eyles, Julie (2008) Source localization of auditory evoked potentials after cochlear implantation. Psychophysiology, 45, (1), 20-24. (doi:10.1111/j.1469-8986.2007.00610.x)
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Description/Abstract
Little is known about how the auditory cortex adapts to artificial input as provided by a cochlear implant (CI). We report the case of a 71-year-old profoundly deaf man, who has successfully used a unilateral CI for 4 years. Independent component analysis (ICA) of 61-channel EEG recordings could separate CI-related artifacts from auditory-evoked potentials (AEPs), even though it was the perfectly time-locked CI stimulation that caused the AEPs. AEP dipole source localization revealed contralaterally larger amplitudes in the P1-N1 range, similar to normal hearing individuals. In contrast to normal hearing individuals, the man with the CI showed a 20-ms shorter N1 latency ipsilaterally. We conclude that ICA allows the detailed study of AEPs in CI users.
| Item Type: | Article |
|---|---|
| ISSN: | 0048-5772 (print) 1469-8986 (electronic) |
| Uncontrolled Keywords: | auditory evoked potential, cochlear implant, independent component analysis, dipole source analysis, n1 |
| 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: | 184389 |
| URI: | http://eprints.soton.ac.uk/id/eprint/184389 |
| Deposited On: | 05 May 2011 16:21 |
| Last Modified: | 30 Apr 2012 14:19 |
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