Chunk #35 — Methods to Assess Brain Connectivity Based on Phase Coupling — Frequency-Specific Phase Coupling Methods — Univariate Methods

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Brain Functional Connectivity Through Phase Coupling of Neuronal Oscillations: A Perspective From Magnetoencephalography.

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since it requires a phase difference between signals to be non-vanishing, and thus it does not lead to artificial phase coupling detections due to zero-lag correlations due to e.g. source leakage. An alternative approach was proposed by Pascual-Marqui (2007a) with the lagged coherence (ρ2), i.e.,