Association of the retrospective self-report ratings with the dynamics of EEG

Galina V Portnova; Yulia V Ukraintseva; Krystsina M Liaukovich; Olga V Martynova

doi:10.1016/j.heliyon.2019.e02533

Association of the retrospective self-report ratings with the dynamics of EEG

Heliyon. 2019 Oct 1;5(10):e02533. doi: 10.1016/j.heliyon.2019.e02533. eCollection 2019 Oct.

Authors

Galina V Portnova^{1

2}, Yulia V Ukraintseva¹, Krystsina M Liaukovich¹, Olga V Martynova^{1

3}

Affiliations

¹ Institute of Higher Nervous Activity and Neurophysiology of RAS, Russian Federation.
² The Pushkin State Russian Language Institute, Russian Federation.
³ Centre for Cognition and Decision Making, Institute for Cognitive Neuroscience, National Research University Higher School of Economics, Russian Federation.

Abstract

The neural underpinnings of subjective experience during resting state remain elusive. Dynamic features of EEG oscillations may provide more understanding of the relationship between the content of inner conscious experience and electrical brain activity. We tested a correlation of rating on the Amsterdam Resting-State Questionnaire (ARSQ) with dynamic parameters of EEG recorded in 49 healthy volunteers during the 10-min resting session. The participants filled ARSQ immediately after the rest. We investigated both linear (1 Hz-band power spectral density - PSD) and dynamic features (standard deviation and frequency of Hilbert envelope) of EEG averaged for the whole resting-state segment. Besides, we conducted a procedure of k-mean clustering based on PSD, localization of components retrieved by independent component analysis for 10-sec EEG epochs to assess spectral and temporal variability of EEG. The correlation analysis showed that the increase of PSD and cluster duration of the high-frequency alpha rhythm (12-13 Hz) in central and frontal areas was positively associated with the rating of experienced thoughts related to Planning (r = 0.44). The time of the presence of low amplitude delta oscillations correlated negatively with Planning (r = -0.52). The participants with higher ARSQ scores of Visual Thoughts had a higher standard deviation of the wideband (1-30 Hz) Hilbert envelope. Our data suggest that the dynamic properties of EEG reflect cognitive states assessed by ARSQ.

Keywords: Amsterdam resting-state questionnaire; Behavioral neuroscience; Cognitive psychology; EEG; Hilbert envelope; K-mean clustering; Neuroscience; Power spectral density; Psychology; Resting state; Signal processing.