Alpha rhythm and Alzheimer's disease: Has Hans Berger's dream come true?

Claudio Babiloni, Xianghong Arakaki, Sandra Baez, Robert J. Barry, Alberto Benussi, Katarzyna Blinowska, Laura Bonanni, Barbara Borroni, Jorge Bosch Bayard, Giuseppe Bruno, Alessia Cacciotti, Filippo Carducci, John Carino, Matteo Carpi, Antonella Conte, Josephine Cruzat, Fabrizia D'Antonio, Stefania Della Penna, Claudio Del Percio, Pierfilippo De SanctisJavier Escudero, Giovanni Fabbrini, Francesca R. Farina, Francisco J. Fraga, Peter Fuhr, Ute Gschwandtner, Bahar Güntekin, Yi Guo, Mihaly Hajos, Mark Hallett, Harald Hampel, Lutfu Hanoğlu, Ira Haraldsen, Mahmoud Hassan, Christoffer Hatlestad-Hall, András Attila Horváth, Agustin Ibanez, Francesco Infarinato, Alberto Jaramillo-Jimenez, Jaeseung Jeong, Yang Jiang, Maciej Kamiński, Giacomo Koch, Sanjeev Kumar, Giorgio Leodori, Gang Li, Roberta Lizio, Susanna Lopez, Raffaele Ferri, Fernando Maestú, Camillo Marra, Laura Marzetti, William McGeown, Francesca Miraglia, Sebastian Moguilner, Davide V. Moretti, Faisal Mushtaq, Giuseppe Noce, Lorenzo Nucci, John Ochoa, Paolo Onorati, Alessandro Padovani, Chiara Pappalettera, Mario Alfredo Parra, Matteo Pardini, Roberto Pascual-Marqui, Walter Paulus, Vittorio Pizzella, Pavel Prado, Géraldine Rauchs, Petra Ritter, Marco Salvatore, Hernando Santamaria-García, Michael Schirner, Andrea Soricelli, John Paul Taylor, Hatice Tankisi, Franca Tecchio, Stefan Teipel, Alpha Tom Kodamullil, Antonio Ivano Triggiani, Mitchell Valdes-Sosa, Pedro Valdes-Sosa, Fabrizio Vecchio, Keith Vossel, Dezhong Yao, Görsev Yener, Ulf Ziemann, Anita Kamondi

Research output: Contribution to journalReview articlepeer-review

Abstract

In this “centenary” paper, an expert panel revisited Hans Berger's groundbreaking discovery of human restingstate electroencephalographic (rsEEG) alpha rhythms (8–12 Hz) in 1924, his foresight of substantial clinical applications in patients with “senile dementia,” and new developments in the field, focusing on Alzheimer's disease (AD), the most prevalent cause of dementia in pathological aging. Clinical guidelines issued in 2024 by the US National Institute on Aging-Alzheimer's Association (NIA-AA) and the European Neuroscience Societies did not endorse routine use of rsEEG biomarkers in the clinical workup of older adults with cognitive impairment. Nevertheless, the expert panel highlighted decades of research from independent workgroups and different techniques showing consistent evidence that abnormalities in rsEEG delta, theta, and alpha rhythms (< 30 Hz) observed in AD patients correlate with wellestablished AD biomarkers of neuropathology, neurodegeneration, and cognitive decline. We posit that these abnormalities may reflect alterations in oscillatory synchronization within subcortical and cortical circuits, inducing cortical inhibitory-excitatory imbalance (in some cases leading to epileptiform activity) and vigilance dysfunctions (e.g., mental fatigue and drowsiness), which may impact AD patients’ quality of life. Berger's vision of using EEG to understand and manage dementia in pathological aging is still actual.

Original languageEnglish
Pages (from-to)33-50
Number of pages18
JournalClinical Neurophysiology
Volume172
DOIs
StatePublished - Apr 2025
Externally publishedYes

Keywords

  • Alzheimer's Disease (AD)
  • Biomarkers
  • Delta, Theta, and Alpha Rhythms
  • Hans Berger
  • Mild Cognitive Impairment (MCI)
  • Resting-State Electroencephalographic (rsEEG) Rhythms

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