Title :
Phase synchronization and directional coupling between brain and heart during sleep
Author :
Abdullah, Hanim ; Maddage, N. ; Cvetkovic, Dean
Author_Institution :
Sch. of Electr. & Comput. Eng., RMIT Univ., Melbourne, VIC, Australia
Abstract :
Phase synchronization is a measure of interaction between phases of two chaotic systems although their amplitudes are uncorrelated. Here, we investigate the synchronization between heart signals and EEG frequency bands (delta1, delta2, theta, alpha1, alpha2, sigma, beta and gamma) during sleep Stage 1-4 and REM in the healthy and sleep apnoea by means of Synchronization Index (SI) and Directionality Index (d). The results showed that in both groups and all sleep stages, there was a strong unidirectional coupling from brain to heart.
Keywords :
chaos; electroencephalography; sleep; synchronisation; Directionality Index; EEG frequency bands; Synchronization Index; brain; chaotic systems; directional coupling; heart signals; phase synchronization; sleep; ECG; EEG; directionality; phase synchronization; sleep;
Conference_Titel :
Biomedical Engineering and Sciences (IECBES), 2012 IEEE EMBS Conference on
Conference_Location :
Langkawi
Print_ISBN :
978-1-4673-1664-4
DOI :
10.1109/IECBES.2012.6498075
