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. Author manuscript; available in PMC: 2014 Jun 9.
Published in final edited form as: J Neurosci Methods. 2014 Jan 19;226:15–32. doi: 10.1016/j.jneumeth.2014.01.006

Fig. 9.

Fig. 9

Asymmetric phase-giving oscillations. In (A–D), we show the average comodulogram for 50 realizations of a signal with a phase-giving oscillation having a 95 data point rising phase and a 5 data point falling phase, obtained with: (A) BPAC1; (B) BPAC2; (C) DFPAC; and (D) IMPAC. In (E-H), we show histograms of the phase and amplitude frequency bins at which the maximum PAC is observed, at all levels of asymmetry, and for all methods. For intermediate levels of asymmetry, the BPAC1 filter with center frequency 8.8 Hz captures both the 6 Hz oscillation and its harmonics, resulting in a signal which replicates the asymmetric 6 Hz oscillation, leading to robust coupling between 65 Hz and 8.8 Hz (D).