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Altered Electroencephalographic Resting-State Large-Scale Brain Network Dynamics in Euthymic Bipolar Disorder Patients

Published in Frontiers in psychiatry. 2019, vol. 10, no. 826
Abstract Background: Neuroimaging studies provided evidence for disrupted resting-state functional brain network activity in bipolar disorder (BD). Electroencephalographic (EEG) studies found altered temporal characteristics of functional EEG microstates during depressive episode within different affective disorders. Here we investigated whether euthymic patients with BD show deviant resting-state large-scale brain network dynamics as reflected by altered temporal characteristics of EEG microstates. Methods: We used high-density EEG to explore between-group differences in duration, coverage, and occurrence of the resting-state functional EEG microstates in 17 euthymic adults with BD in on-medication state and 17 age- and gender-matched healthy controls. Two types of anxiety, state and trait, were assessed separately with scores ranging from 20 to 80. Results: Microstate analysis revealed five microstates (A-E) in global clustering across all subjects. In patients compared to controls, we found increased occurrence and coverage of microstate A that did not significantly correlate with anxiety scores. Conclusion: Our results provide neurophysiological evidence for altered large-scale brain network dynamics in BD patients and suggest the increased presence of A microstate to be an electrophysiological trait characteristic of BD.
Keywords Bipolar disorderDynamic brain activityElectroencephalographic microstateHigh-density electroencephalographyLarge-scale brain networksResting state
PMID: 31803082
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Research groups Groupe Dayer Alexandre (Formation du circuit cortical) (875)
NCCR Synapsy
Organisation et plasticité des réseaux neuronaux cérébraux (148)
Thérapeutiques des Troubles de l'Humeur et Anxieux (689)
Swiss National Science Foundation: 320030_184677, 51NF40-185897
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DAMBORSKA, Alena et al. Altered Electroencephalographic Resting-State Large-Scale Brain Network Dynamics in Euthymic Bipolar Disorder Patients. In: Frontiers in Psychiatry, 2019, vol. 10, n° 826. doi: 10.3389/fpsyt.2019.00826 https://archive-ouverte.unige.ch/unige:129084

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Deposited on : 2020-01-20

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