Cross-Bifrequency Analysis of Cardiorespiratory Interactions at Rest and Zen Meditation
International Conference on Systems and Informatics November 1, 2019 Pei-Chen Lo, Yizhou Wu
A modified self-organizing map (IwSOM) that weights input features differently is used to analyze cross-bifrequency maps of heart rate and respiration during Zen-meditation and resting states. The cross-bispectral analysis quantifies quadratic phase coupling between cardiac and respiratory oscillators. IwSOM classification shows that the rest session of the control group is characterized by coupling frequencies where respiratory rate resonates with heart rate at 0.05 Hz. Zen-meditation exhibits strong resonance between heart rate and respiration in the same low frequency range, indicating distinct cardiorespiratory interaction patterns during meditation compared to rest.