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. 2017 Jan 11;7:40268. doi: 10.1038/srep40268

Figure 9. Computation of phase-based coupling parameters.

Figure 9

The pictures exemplify computation of pairwise phase-based coupling and metastability, for data from 4 ICs (one participant). (A) Four time series collected using FSL’s ICA pipelines. (B) The time series are band-pass filtered (0.04–0.07 Hz), to later compute the Hilbert transform. (C) Individual phases obtained from the imaginary component of the Hilbert transform. (D) Kuramoto order parameter estimated across time using the phases. (E) Pairwise phase-coupling matrices, C(t), estimated for the 4 phases, across all time points; delta phi (Δϕ) is normalized as described in Methods.