Figure 2 | Scientific Reports

Figure 2

From: Detection of quadratic phase coupling by cross-bicoherence and spectral Granger causality in bifrequencies interactions

Figure 2

Four 5-second epochs of the three dimensional time series (\(X_1\), \(X_2\), \(X_3\)) for small coupling \(W_{(1,2)}\) (panels A, C) and large coupling \(W_{(1,2)}\) (panels B, D). (A, B) Experimental condition with carrying frequencies \(F_1 = ({120/2\pi }) \approx 19.1\) Hz, \(F_2 = ({70/2\pi }) \approx 11.1\) Hz, and \(F_3 = ({80/2\pi }) \approx 12.7\) Hz. (C, D) Experimental condition with carrying frequencies \(F_1 = ({50-10/2\pi }) \approx 48.4\) Hz, \(F_2 = ({230/2\pi }) \approx 36.6\) Hz, and \(F_3 = ({150/2\pi }) \approx 23.9\) Hz.

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