Figure 4—figure supplement 1. | On cross-frequency phase-phase coupling between theta and gamma oscillations in the hippocampus

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On cross-frequency phase-phase coupling between theta and gamma oscillations in the hippocampus

Figure 4—figure supplement 1.

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Federal University of Rio Grande do Norte, Brazil
Figure 4—figure supplement 1.
Download figureOpen in new tabFigure 4—figure supplement 1. Waveform asymmetry may lead to spurious phase-amplitude coupling.

(A) A theta sawtooth wave along with its theta- (7 Hz) and gamma-filtered (35 Hz) components. Notice that no gamma oscillations exist in the original sawtooth wave, but they spuriously appear when filtering sharp deflections (Kramer et al., 2008). The amplitude of the spurious gamma waxes and wanes within theta cycles. (B) Mean gamma amplitude as a function of theta phase.

DOI: http://dx.doi.org/10.7554/eLife.20515.011