Article (Scientific journals)
Shared reduction of oscillatory natural frequencies in bipolar disorder, major depressive disorder and schizophrenia.
Canali, Paola; Sarasso, Simone; Rosanova, Mario et al.
2015In Journal of Affective Disorders, 184, p. 111-5
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Keywords :
Adult; Bipolar Disorder/physiopathology; Brain Waves/physiology; Case-Control Studies; Depressive Disorder, Major/physiopathology; Electroencephalography; Female; Frontal Lobe/physiopathology; Humans; Male; Middle Aged; Neural Pathways/physiopathology; Schizophrenia/physiopathology; Thalamus/physiopathology; Transcranial Magnetic Stimulation; GABAergic circuits; Gamma oscillations; Neuropsychiatric disorders; TMS/EEG
Abstract :
[en] INTRODUCTION: Recent studies have demonstrated that cortical brain areas tend to oscillate at a specific natural frequency when directly perturbed by transcranial magnetic stimulation (TMS). Fast electroencephalographic (EEG) oscillations, which typically originate from frontal regions, have been reported to be markedly reduced in schizophrenia. METHODS: Here we employed TMS/EEG to assess the natural frequency of the premotor area in a sample of 48 age-matched participants (12 each in major depression disorder (MDD)), bipolar disorder (BPD), schizophrenia (SCZ) and healthy controls. Event related spectral perturbations (ERSP) were obtained for each study participant using wavelet decomposition. RESULTS: TMS resulted in a significant activation of the beta/gamma band response (21-50 Hz) to frontal cortical perturbation in healthy control subjects. By contrast, the main frequencies of frontal EEG responses to TMS were significantly reduced in patients with BPD, MDD and SCZ (11-27 Hz) relative to healthy subjects. CONCLUSIONS: Patients with bipolar disorder, major depression and schizophrenia showed a significantly lower natural frequency of frontal cortico-thalamocortical circuits compared to healthy controls. These results suggest a common neurobiological mechanism of corticothalamic impairment. The most likely candidates include dysfunction of GABAergic circuits. LIMITATIONS: Further studies are needed to consider other biological markers, gene variants, and their interaction with clinical variables.
Disciplines :
Neurology
Author, co-author :
Canali, Paola
Sarasso, Simone
Rosanova, Mario
Casarotto, Silvia
Sferrazza-Papa, Giovanna
Gosseries, Olivia  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Fecchio, Matteo
Massimini, Marcello
Mariotti, Maurizio
Cavallaro, Roberto
Smeraldi, Enrico
Colombo, Cristina
Benedetti, Francesco
More authors (3 more) Less
Language :
English
Title :
Shared reduction of oscillatory natural frequencies in bipolar disorder, major depressive disorder and schizophrenia.
Publication date :
2015
Journal title :
Journal of Affective Disorders
ISSN :
0165-0327
eISSN :
1573-2517
Publisher :
Elsevier, Netherlands
Volume :
184
Pages :
111-5
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2015 Elsevier B.V. All rights reserved.
Available on ORBi :
since 22 August 2019

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