From: Lack of redundancy between electrophysiological measures of long-range neuronal communication
Category | Acronym | Metric | Description | References |
---|---|---|---|---|
Non-directed coupling, synchrony | – | Coherence (magnitude) | Magnitude of the complex cross-spectrum | |
ImC | Imaginary part of coherence | Discards the real component of the cross-spectrum | [3] | |
PLI | Phase Lag Index | Disregards the magnitude of the cross-spectrum and averages the sign of phase differences | [4] | |
wPLI | Weighted phase lag index | Phase lags are weighed by the magnitude of the imaginary component of the cross-spectrum | [5] | |
PLV | Phase-locking value | Circular resultant vector length of the phase differences | [6] | |
PPC | Pairwise phase consistency | Computed based on the distribution of phase differences | [7] | |
Directed (lead/lag, LFP-based) | – | Coherence phase angle | Angle of the complex cross-spectrum | |
CC | Cross-amplitude coupling, amplitude cross-correlation | Instantaneous amplitudes of two filtered LFPs are cross-correlated and the lag at which the peak occurred is determined | [10] | |
Directed (causal influence) | GC | Granger causality | Quantifies if the past of one time series can predict the future of another time series using autoregressive modelling | |
npGC | Non-parametric Granger causality | Granger causality based on spectral matrix factorization | [15] | |
PDC | Partial directed coherence | Normalized metric based on GC that measures direct influence from one time series to another | [16] | |
DTF | Direct transfer function | Adaptation to multiple input variables closely related to PDC | ||
Directed (phase-locking of local activity) | SPC, MRL | Spike-phase coupling, Mean resultant vector length | Circular concentration of the phase distribution at which spikes occurred | |
PAC, CFC, MI | Phase amplitude coupling, cross-frequency coupling, modulation index | Modulation of the amplitude of high-frequency oscillations in one area by the phase of low-frequency oscillations from another area | ||
Directed (lead lag, spike-based) | – | Phase angle of MRL | Mean phase at which spikes occurred | [20] |
– | Phase-shifted MRL | Calculation of the MRL based on phases at shifted lags |