A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus

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A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus

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Title: A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus
Author(s):
Song, Jae-Jin;
Kim, Kyungsoo;
Sunwoo, Woongsang;
Mertens, Griet;
Van de Heyning, Paul;
De Ridder, Dirk;
Vanneste, Sven;
Lee, Sang-Youp;
Park, Kyung-Joon;
Choi, Hongsoo;
Choi, Ji-Woong
Date Created: 5/18/2017
Item Type: article
Keywords: Show Keywords
Abstract: The mechanism of tinnitus suppression after cochlear implantation (CI) in single-sided deafness (SSD) is not fully understood. In this regard, by comparing pre-and post-CI quantitative electroencephalography (qEEG), we explored cortical changes relevant to tinnitus improvement. In SSD patients who underwent CI, qEEG data were collected: (1) before CI, (2) 6 months post-operatively with CI-on, and (3) 30 min after CI-off and source-localized cortical activity/functional connectivity analyses were performed. Compared to the pre-operative baseline, the CI-on condition demonstrated significantly decreased activity in the right auditory-and orbitofrontal cortices (OFC) for the delta frequency band as well as decreased connectivity between the auditory cortex/posterior cingulate cortex for the delta/beta2 bands. Meanwhile, compared to the CI-off condition, the CI-on condition displayed decreased activity in the right auditory cortices/OFC for the delta band, and in bilateral auditory cortices, left inferior frontal cortex/OFC for the gamma band. However, qEEG analyses showed no significant differences between the CI-off and baseline conditions. CI induced overall decreased cortical activity and functional connectivity. However, judging from no differences between the CI-off and baseline conditions, CI-induced cortical activity and functional connectivity changes are not by cortical plastic changes, but by dynamic peripheral reafferentation.
Publisher: Frontiers Media SA
ISSN: 1662-5161
Link to Related Resource: http://dx.doi.org/10.3389/fnhum.2017.00210
Persistent Link: http://hdl.handle.net/10735.1/6120
Bibliographic Citation: Song, Jae-Jin, Kyungsoo Kim, Woongsang Sunwoo, Griet Mertens, et al. 2017. "A quantitative electroencephalography study on cochlear implant-induced cortical changes in single-sided deafness with tinnitus." Frontiers in Human Neuroscience 11, doi:10.3389/fnhum.2017.00210
Terms of Use: CC BY 4.0 (Attribution)
©2017 The Authors
Sponsors: National Research Foundation of Korea (NRF) grant (No. 2016R1C1B2007911); Institute for Information and Communications Technology Promotion (IITP) grant (2014-0-00065).

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CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)