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Song JJ, Kim K, Sunwoo W, et al. A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus. Front Hum Neurosci. 2017;11:210doi: 10.3389/fnhum.2017.00210.
Song, J. J., Kim, K., Sunwoo, W., Mertens, G., Van de Heyning, P., De Ridder, D., Vanneste, S., Lee, S. Y., Park, K. J., Choi, H., & Choi, J. W. (2017). A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus. Frontiers in human neuroscience, 11210. https://doi.org/10.3389/fnhum.2017.00210
Song, Jae-Jin, et al. "A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus." Frontiers in human neuroscience vol. 11 (2017): 210. doi: https://doi.org/10.3389/fnhum.2017.00210
Song JJ, Kim K, Sunwoo W, Mertens G, Van de Heyning P, De Ridder D, Vanneste S, Lee SY, Park KJ, Choi H, Choi JW. A Quantitative Electroencephalography Study on Cochlear Implant-Induced Cortical Changes in Single-Sided Deafness with Tinnitus. Front Hum Neurosci. 2017 May 18;11:210. doi: 10.3389/fnhum.2017.00210. eCollection 2017. PMID: 28572760; PMCID: PMC5435818.
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Front Hum Neurosci. 2017 May 18;11:210. doi: 10.3389/fnhum.2017.00210. eCollection 2017.

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

Frontiers in human neuroscience

Jae-Jin Song, Kyungsoo Kim, Woongsang Sunwoo, Griet Mertens, Paul Van de Heyning, Dirk De Ridder, Sven Vanneste, Sang-Youp Lee, Kyung-Joon Park, Hongsoo Choi, Ji-Woong Choi

Affiliations

  1. Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University HospitalSeoul, South Korea.
  2. Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and TechnologyDaegu, South Korea.
  3. Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital AntwerpEdegem, Belgium.
  4. Department of Surgical Sciences, Section of Neurosurgery, Dunedin School of Medicine, University of OtagoDunedin, New Zealand.
  5. Lab for Clinical and Integrative Neuroscience, School of Behavioral and Brain Sciences, The University of Texas at Dallas, RichardsonTX, USA.
  6. Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and TechnologyDaegu, South Korea.

PMID: 28572760 PMCID: PMC5435818 DOI: 10.3389/fnhum.2017.00210

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.

Keywords: cochlear implantation; dynamic peripheral reafferentation; electroencephalography; single side deafness; tinnitus

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