Mindfulness Training is Associated with Changes in Alpha-Theta Cross-Frequency Dynamics During Meditation


" Previous literature suggests that cross-frequency phase synchronization is a mechanism by which information is transmitted and coordinated in the brain. Since cross-frequency phase synchronization is only strictly possible when two oscillators form a harmonic frequency ratio (e.g., 2:1, 3:1), a recent theory posited that interactions between brain oscillations at different frequencies are facilitated/hindered by the transient occurrence of harmonic/non-harmonic cross-frequency arrangements. In this line, recent evidence has shown that 2:1 harmonic relationships between alpha (8–14 Hz) and theta (4–8 Hz) rhythms are reduced during meditative states in experienced practitioners. In the present study, we investigated whether mindfulness training in novices is associated with longitudinal changes in alpha-theta cross-frequency dynamics during meditation practice."

" Mindfulness training compliance (quantified by minutes of attendance and practice at home) was significantly correlated to decreased 3:1 harmonicity and cross-frequency phase synchrony between alpha and theta rhythms during meditation."

" Information exchange between brain rhythms is thought to be implemented through cross-frequency phase synchronization (Palva and Palva 2017). Crucially, phase synchronization between two oscillators depends on transient changes in their center frequencies and their influence in the occurrence of different cross-frequency ratios."


Last modified on 07-Oct-21

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