Parkinson's disease (PD) is a movement disorder caused by degeneration in dopaminergic neurons. During the disease course, most of PD patients develop mild cognitive impairment (PDMCI) and dementia, especially affecting frontal executive functions. In this study, we tested the hypothesis that PDMCI patients may be characterized by abnormal neurophysiological oscillatory mechanisms coupling frontal and posterior cortical areas during cognitive information processing. To test this hypothesis, event-related EEG oscillations (EROs) during counting visual target (rare) stimuli in an oddball task were recorded in healthy controls (HC; N = 51), cognitively unimpaired PD patients (N = 48), and PDMCI patients (N = 53). Hilbert transform served to estimate instantaneous phase and amplitude of EROs from delta to gamma frequency bands, while modulation index computed ERO phase-amplitude coupling (PAC) at electrode pairs. As compared to the HC and PD groups, the PDMCI group was characterized by (1) more posterior topography of the delta-theta PAC and (2) reversed delta-low frequency alpha PAC direction, ie, posterior-to-anterior rather than anterior-to-posterior. These results suggest that during cognitive demands, PDMCI patients are characterized by abnormal neurophysiological oscillatory mechanisms mainly led by delta frequencies underpinning functional connectivity from frontal to parietal cortical areas.

Abnormal Cross Frequency Coupling of Brain Electroencephalographic Oscillations Related to Visual Oddball Task in Parkinson's Disease with Mild Cognitive Impairment / Bayraktaroğlu, Zübeyir; Aktürk, Tuba; Yener, Görsev; de Graaf, Tom A; Hanoğlu, Lütfü; Yıldırım, Ebru; Hünerli Gündüz, Duygu; Kıyı, İlayda; Sack, Alexander T; Babiloni, Claudio; Güntekin, Bahar. - In: CLINICAL EEG AND NEUROSCIENCE. - ISSN 1550-0594. - (2022), p. 15500594221128713. [10.1177/15500594221128713]

Abnormal Cross Frequency Coupling of Brain Electroencephalographic Oscillations Related to Visual Oddball Task in Parkinson's Disease with Mild Cognitive Impairment

Babiloni, Claudio;
2022

Abstract

Parkinson's disease (PD) is a movement disorder caused by degeneration in dopaminergic neurons. During the disease course, most of PD patients develop mild cognitive impairment (PDMCI) and dementia, especially affecting frontal executive functions. In this study, we tested the hypothesis that PDMCI patients may be characterized by abnormal neurophysiological oscillatory mechanisms coupling frontal and posterior cortical areas during cognitive information processing. To test this hypothesis, event-related EEG oscillations (EROs) during counting visual target (rare) stimuli in an oddball task were recorded in healthy controls (HC; N = 51), cognitively unimpaired PD patients (N = 48), and PDMCI patients (N = 53). Hilbert transform served to estimate instantaneous phase and amplitude of EROs from delta to gamma frequency bands, while modulation index computed ERO phase-amplitude coupling (PAC) at electrode pairs. As compared to the HC and PD groups, the PDMCI group was characterized by (1) more posterior topography of the delta-theta PAC and (2) reversed delta-low frequency alpha PAC direction, ie, posterior-to-anterior rather than anterior-to-posterior. These results suggest that during cognitive demands, PDMCI patients are characterized by abnormal neurophysiological oscillatory mechanisms mainly led by delta frequencies underpinning functional connectivity from frontal to parietal cortical areas.
2022
brain event-related oscillations (EROs); cross-frequency coupling; oddball paradigm; parkinson's disease; parkinson's disease with mild cognitive impairment (PDMCI); phase-amplitude coupling
01 Pubblicazione su rivista::01a Articolo in rivista
Abnormal Cross Frequency Coupling of Brain Electroencephalographic Oscillations Related to Visual Oddball Task in Parkinson's Disease with Mild Cognitive Impairment / Bayraktaroğlu, Zübeyir; Aktürk, Tuba; Yener, Görsev; de Graaf, Tom A; Hanoğlu, Lütfü; Yıldırım, Ebru; Hünerli Gündüz, Duygu; Kıyı, İlayda; Sack, Alexander T; Babiloni, Claudio; Güntekin, Bahar. - In: CLINICAL EEG AND NEUROSCIENCE. - ISSN 1550-0594. - (2022), p. 15500594221128713. [10.1177/15500594221128713]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1672726
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