Nishida, Keiichiro; Morishima, Yosuke; Yoshimura, Masafumi; Isotani, Toshiaki; Irisawa, Satoshi; Jann, Kay; Dierks, Thomas; Strik, Werner; Kinoshita, Toshihiko; Koenig, Thomas (2013). EEG microstates associated with salience and frontoparietal networks in frontotemporal dementia, schizophrenia and Alzheimer's disease. Clinical neurophysiology, 124(6), pp. 1106-1114. Elsevier 10.1016/j.clinph.2013.01.005
Full text not available from this repository.OBJECTIVE:
There are relevant links between resting-state fMRI networks, EEG microstate classes and psychopathological alterations in mental disorders associated with frontal lobe dysfunction. We hypothesized that a certain microstate class, labeled C and correlated with the salience network, was impaired early in frontotemporal dementia (FTD), and that microstate class D, correlated with the frontoparietal network, was impaired in schizophrenia.
METHODS:
We measured resting EEG microstate parameters in patients with mild FTD (n = 18), schizophrenia (n = 20), mild Alzheimer's disease (AD; n = 19) and age-matched controls (old n = 19, young n = 18) to investigate neuronal dynamics at the whole-brain level.
RESULTS:
The duration of class C was significantly shorter in FTD than in controls and AD, and the duration of class D was significantly shorter in schizophrenia than in controls, FTD and AD. Transition analysis showed a reversed sequence of activation of classes C and D in FTD and schizophrenia patients compared with that in controls, with controls preferring transitions from C to D, and patients preferring D to C.
CONCLUSION:
The duration and sequence of EEG microstates reflect specific aberrations of frontal lobe functions in FTD and schizophrenia.
SIGNIFICANCE:
This study highlights the importance of subsecond brain dynamics for understanding of psychiatric disorders.
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