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Front. Neurosci. | doi: 10.3389/fnins.2018.00292

Abnormal Resting-state Quantitative Electroencephalogram in Children with Central Auditory Processing Disorder: A Pilot Study

 Rafał Milner1*,  Monika Lewandowska2, Małgorzata Ganc1, Elżbieta Włodarczyk3, Diana Grudzień4 and Henryk Skarżyński5
  • 1Department of Experimental Audiology, Institute of Physiology and Pathology of Hearing, Poland
  • 2Bioimaging Research Center, Institute of Physiology and Pathology of Hearing, Poland
  • 3Audiology and Phoniatrics Clinic, Institute of Physiology and Pathology of Hearing, Poland
  • 4Rehabilitation Clinic, Institute of Physiology and Pathology of Hearing, Poland
  • 5Institute of Physiology and Pathology of Hearing, Poland

In this study, we showed an abnormal resting-state quantitative electroencephalogram (QEEG) pattern in children with central auditory processing disorder (CAPD). Twenty-seven children (16 male, 11 female; mean age = 10.7 years) with CAPD and no symptoms of other developmental disorders, as well as 23 age- and sex-matched, typically developing children (TDC, 11 male, 13 female; mean age = 11.8 years) underwent examination of central auditory processes and QEEG evaluation consisting of two randomly presented blocks of “Eyes Open” (EO) or “Eyes Closed” (EC) recordings.

Significant correlations between individual frequency band powers and CAP tests performance were found. The QEEG studies revealed that in CAPD relative to TDC there was no effect of decreased delta absolute power (1.5–4 Hz) in EO compared to the EC condition. Furthermore, children with CAPD showed increased theta power (4–8 Hz) in the frontal area, a tendency towards elevated theta power in EO block, and reduced low-frequency beta power (12–15 Hz) in the bilateral occipital and the left temporo-occipital regions for both EO and EC conditions. Decreased middle-frequency beta power (15–18 Hz) in children with CAPD was observed only in the EC block.

The findings of the present study suggest that QEEG could be an adequate tool to discriminate children with CAPD from normally developing children. Correlation analysis shows relationship between the individual EEG resting frequency bands and the central auditory processes. Increased power of slow waves and decreased power of fast rhythms could indicate abnormal functioning (hypoarousal of the cortex and/or an immaturity) of brain areas not specialized in auditory information processing.

Keywords: Central auditory processing disorder (CAPD), resting-state bioelectrical activity, quantitative electroencephalography (QEEG), Central auditory processes, Auditory deficits, Children

Received: 22 Nov 2017; Accepted: 13 Apr 2018.

Edited by:

Virginia Penhune, Concordia University, Canada

Reviewed by:

Dan Zhang, Tsinghua University, China
Peter Schneider, Universität Heidelberg, Germany  

Copyright: © 2018 Milner, Lewandowska, Ganc, Włodarczyk, Grudzień and Skarżyński. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: PhD. Rafał Milner, Institute of Physiology and Pathology of Hearing, Department of Experimental Audiology, Warsaw, Poland, r.milner@ifps.org.pl