This manuscript describes how to use the wavelet entropy index to analyze high-density electroencephalography (EEG) and electrocardiography (ECG) data. We show that the irregularity of cerebral and cardiac activities became more coordinated during mindfulness-based stress reduction practice.
Sik, H. H., Gao, J., Fan, J., Wu, B. W. Y., Leung, H. K., Hung, Y. S. Using Wavelet Entropy to Demonstrate how Mindfulness Practice Increases Coordination between Irregular Cerebral and Cardiac Activities. J. Vis. Exp. (123), e55455, doi:10.3791/55455 (2017).