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Cerebral Cortex Advance Access published online on April 20, 2005
Cerebral Cortex, doi:10.1093/cercor/bhi081
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© The Author 2005. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oupjournals.org

Article

Dynamics of Auditory Plasticity after Cochlear Implantation: A Longitudinal Study

C. Pantev 1*, A. Dinnesen 2, B. Ross 3, A. Wollbrink 1, and A. Knief 2

1 Institute for Biomagnetism and Biosignalanalysis, Münster University Hospital, University of Münster, Germany
2 Department of Phoniatrics and Pediatric Audiology, Münster University Hospital, University of Münster, Germany
3 Institute for Biomagnetism and Biosignalanalysis, Münster University Hospital, University of Münster, Germany; The Rotman Research Institute, Baycrest Centre for Geriatric Care, Toronto, Canada

* To whom correspondence should be addressed.
C. Pantev, E-mail: pantev{at}uni-muenster.de


  Abstract

Human representational cortex may fundamentally alter its organization and (re)gain the capacity for auditory processing even when it is deprived of its input for more than two decades. Stimulus-evoked brain activity was recorded in post-lingual deaf patients after implantation of a cochlear prosthesis, which partly restored their hearing. During a 2 year follow-up study this activity revealed almost normal component configuration and was localized in the auditory cortex, demonstrating adequacy of the cochlear implant stimulation. Evoked brain activity increased over several months after the cochlear implant was turned on. This is taken as a measure of the temporal dynamics of plasticity of the human auditory system after implantation of cochlear prosthesis.

Keywords: auditory cortex; auditory plasticity dynamics; cochlear implant; magnetoencephalography.
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