Abnormalities of resting-state EEG in patients with prodromal and overt dementia with Lewy bodies: Relation to clinical symptoms

M.T. Pascarelli, C. Del Percio, M.F. De Pandis, R. Ferri, R. Lizio, G. Noce, S. Lopez, M. Rizzo, A. Soricelli, F. Nobili, D. Arnaldi, F. Famà, F. Orzi, C. Buttinelli, F. Giubilei, M. Salvetti, V. Cipollini, R. Franciotti, M. Onofri, P. FuhrU. Gschwandtner, G. Ransmayr, D. Aarsland, L. Parnetti, L. Farotti, M. Marizzoni, F. D'Antonio, C. De Lena, B. Güntekin, L. Hanoğlu, G. Yener, D.D. Emek-Savaş, A. Ivano Triggiani, J. Paul Taylor, I. McKeith, F. Stocchi, L. Vacca, H. Hampel, G.B. Frisoni, L. Bonanni, C. Babiloni

Research output: Contribution to journalArticlepeer-review


Objective: Here we tested if cortical sources of resting state electroencephalographic (rsEEG) rhythms may differ in sub-groups of patients with prodromal and overt dementia with Lewy bodies (DLB) as a function of relevant clinical symptoms. Methods: We extracted clinical, demographic and rsEEG datasets in matched DLB patients (N = 60) and control Alzheimer's disease (AD, N = 60) and healthy elderly (Nold, N = 60) seniors from our international database. The eLORETA freeware was used to estimate cortical rsEEG sources. Results: As compared to the Nold group, the DLB and AD groups generally exhibited greater spatially distributed delta source activities (DLB > AD) and lower alpha source activities posteriorly (AD > DLB). As compared to the DLB “controls”, the DLB patients with (1) rapid eye movement (REM) sleep behavior disorders showed lower central alpha source activities (p <0.005); (2) greater cognitive deficits exhibited higher parietal and central theta source activities as well as higher central, parietal, and occipital alpha source activities (p <0.01); (3) visual hallucinations pointed to greater parietal delta source activities (p <0.005). Conclusions: Relevant clinical features were associated with abnormalities in spatial and frequency features of rsEEG source activities in DLB patients. Significance: Those features may be used as neurophysiological surrogate endpoints of clinical symptoms in DLB patients in future cross-validation prospective studies. © 2020 International Federation of Clinical Neurophysiology
Original languageEnglish
Pages (from-to)2716-2731
Number of pages16
JournalClin. Neurophysiol.
Issue number11
Publication statusPublished - 2020


  • Exact low-resolution brain electromagnetic source tomography (eLORETA)
  • Mild cognitive impairment (MCI)
  • Prodromal and overt dementia with Lewy bodies (DLB)
  • Rapid eye movement sleep behavior disorders (RBD)
  • Resting state electroencephalographic (EEG) rhythms
  • Visual hallucinations
  • aged
  • alpha rhythm
  • Alzheimer disease
  • Article
  • beta rhythm
  • clinical feature
  • cognitive defect
  • controlled study
  • cross validation
  • delta rhythm
  • diffuse Lewy body disease
  • electroencephalogram
  • female
  • gamma rhythm
  • human
  • major clinical study
  • male
  • mild cognitive impairment
  • Mini Mental State Examination
  • observational study
  • occipital cortex
  • parasomnia
  • parietal cortex
  • preliminary data
  • priority journal
  • prodromal symptom
  • REM sleep
  • resting state network
  • retrospective study
  • spectroscopy
  • theta rhythm
  • Unified Parkinson Disease Rating Scale
  • visual hallucination

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