K-th Nearest Neighbor (KNN) Entropy Estimates of Complexity and Integration from Ongoing and Stimulus-Evoked Electroencephalographic (EEG) Recordings of the Human Brain

Overview

Journal Entropy (Basel)

Publisher MDPI

Date 2020 Dec 3

PMID 33266777

Citations 2

Authors

Logan T Trujillo

Affiliations

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Abstract

Information-theoretic measures for quantifying multivariate statistical dependence have proven useful for the study of the unity and diversity of the human brain. Two such measures-integration, , and interaction complexity, -have been previously applied to electroencephalographic (EEG) signals recorded during ongoing wakeful brain states. Here, and were computed for empirical and simulated visually-elicited alpha-range (8-13 Hz) EEG signals. Integration and complexity of evoked (stimulus-locked) and induced (non-stimulus-locked) EEG responses were assessed using nonparametric nearest neighbor (KNN) entropy estimation, which is robust to the nonstationarity of stimulus-elicited EEG signals. KNN-based and were also computed for the alpha-range EEG of ongoing wakeful brain states. and patterns differentiated between induced and evoked EEG signals and replicated previous wakeful EEG findings obtained using Gaussian-based entropy estimators. Absolute levels of and were related to absolute levels of alpha-range EEG power and phase synchronization, but stimulus-related changes in the information-theoretic and other EEG properties were independent. These findings support the hypothesis that visual perception and ongoing wakeful mental states emerge from complex, dynamical interaction among segregated and integrated brain networks operating near an optimal balance between order and disorder.

Citing Articles

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