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Reliability of EEG Interactions Differs between Measures and Is Specific for Neurological Diseases

Frontiers in human neuroscience, 2017-07, Vol.11, p.350-350 [Peer Reviewed Journal]

COPYRIGHT 2017 Frontiers Research Foundation ;2017. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;Copyright © 2017 Höller, Butz, Thomschewski, Schmid, Uhl, Bathke, Zimmermann, Tomasi, Nardone, Staffen, Höller, Leitinger, Höfler, Kalss, Taylor, Kuchukhidze and Trinka. 2017 Höller, Butz, Thomschewski, Schmid, Uhl, Bathke, Zimmermann, Tomasi, Nardone, Staffen, Höller, Leitinger, Höfler, Kalss, Taylor, Kuchukhidze and Trinka ;ISSN: 1662-5161 ;EISSN: 1662-5161 ;DOI: 10.3389/fnhum.2017.00350 ;PMID: 28725190

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  • Title:
    Reliability of EEG Interactions Differs between Measures and Is Specific for Neurological Diseases
  • Author: Höller, Yvonne ; Butz, Kevin ; Thomschewski, Aljoscha ; Schmid, Elisabeth ; Uhl, Andreas ; Bathke, Arne C ; Zimmermann, Georg ; Tomasi, Santino O ; Nardone, Raffaele ; Staffen, Wolfgang ; Höller, Peter ; Leitinger, Markus ; Höfler, Julia ; Kalss, Gudrun ; Taylor, Alexandra C ; Kuchukhidze, Giorgi ; Trinka, Eugen
  • Subjects: Alzheimers disease ; Biomarkers ; Brain research ; Causality ; Cognitive ability ; Convulsions & seizures ; EEG ; EEG connectivity ; Epilepsy ; Firing pattern ; Localization ; Memory ; mild cognitive impairment ; Nervous system diseases ; Neural networks ; Neurological diseases ; Neuroscience ; Neurosciences ; Population studies ; reliability ; subjective cognitive complaints ; Temporal lobe ; temporal lobe epilepsy
  • Is Part Of: Frontiers in human neuroscience, 2017-07, Vol.11, p.350-350
  • Description: Alterations of interaction ( ) of the EEG reflect pathological processes in patients with neurologic disorders. Nevertheless, it is questionable whether these patterns are reliable over time in different measures of interaction and whether this reliability of the measures is the same across different patient populations. In order to address this topic we examined 22 patients with mild cognitive impairment, five patients with subjective cognitive complaints, six patients with right-lateralized temporal lobe epilepsy, seven patients with left lateralized temporal lobe epilepsy, and 20 healthy controls. We calculated 14 measures of interaction from two EEG-recordings separated by 2 weeks. In order to characterize test-retest reliability, we correlated these measures for each group and compared the correlations between measures and between groups. We found that both measures of interaction as well as groups differed from each other in terms of reliability. The strongest correlation coefficients were found for spectrum, coherence, and full frequency directed transfer function (average rho > 0.9). In the delta (2-4 Hz) range, reliability was lower for mild cognitive impairment compared to healthy controls and left lateralized temporal lobe epilepsy. In the beta (13-30 Hz), gamma (31-80 Hz), and high gamma (81-125 Hz) frequency ranges we found decreased reliability in subjective cognitive complaints compared to mild cognitive impairment. In the gamma and high gamma range we found increased reliability in left lateralized temporal lobe epilepsy patients compared to healthy controls. Our results emphasize the importance of documenting reliability of measures of interaction, which may vary considerably between measures, but also between patient populations. We suggest that studies claiming clinical usefulness of measures of interaction should provide information on the reliability of the results. In addition, differences between patient groups in reliability of interactions in the EEG indicate the potential of reliability to serve as a new biomarker for pathological memory decline as well as for epilepsy. While the brain concert of information flow is generally variable, high reliability, and thus, low variability may reflect abnormal firing patterns.
  • Publisher: Switzerland: Frontiers Research Foundation
  • Language: English
  • Identifier: ISSN: 1662-5161
    EISSN: 1662-5161
    DOI: 10.3389/fnhum.2017.00350
    PMID: 28725190
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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