Visualizing Brain Synchronization: an explainable representation of phase-amplitude coupling

Abstract

In the realm of neuroscience, brain activity is often char- acterized by rhythmic oscillations at different frequency bands. These oscillations underlie various cognitive processes and constitutes the ba- sis of communication between populations of neurons. Cross-frequency coupling (CFC) refers to techniques directed to study the interactions between oscillations at different frequencies, providing a more compre- hensive view of neural dynamics than traditional measures of connectiv- ity or based on the distribution of the power spectral density. In this paper, we propose a method to explore CFC local patterns in an ex- plainable way, allowing to visualize them over time and to easily identify functional brain areas activated during a task development from the Phase-Amplitude Coupling (PAC) point of view.