Cerebral Synchrony Assessment: A General Review on Cerebral Signals' Synchronization Estimation Concepts and Methods
Résumé
The human brain is ultimately responsible for all thoughts and movements that the body produces. This allows humans to successfully interact with their environment. If the brain is not functioning properly many abilities of human can be damaged. The goal of cerebral signal analysis is to learn about brain function.
The idea that distinct areas of the brain are responsible for specific tasks, the functional segregation, is a key aspect of brain function. Functional integration is an important feature of brain function, it is the concordance of multiple segregated brain areas to produce a unified response. There is an amplified feedback mechanism in the brain called reentry which requires specific timing relations. This specific timing requires neurons within an assembly to synchronize their firing rates. This has led to increased interest and use of phase variables, particularly their synchronization, to measure connectivity in cerebral signals. Herein, we propose a comprehensive review on concepts and methods previously presented for assessing cerebral synchrony, with focus on phase synchronization, as a tool for brain connectivity evaluation.
Mots clés
EMD
Phase Analysis
Imaginary MSC
Magnitude Squared Coherence
Coherence
Correlation
PSD
Phase synchrony
Phase Estimation
Thomson Multitapers
Multiple MSC
Bispectrum
MSC
Higher Order Spectra
HOS
Phase Locking Value
PLV
PLS
Synchronization
Connectivity
Cerebral Connectivity
Phase Lag Index
PLI
WPLI
Parametric Spectral Estimation
Mean Phase Coherence
MPC
Wavelet Coherence
WC
WPLV
Empirical Mode Decomposition
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