Reduced functional connectivity between cortical sources in five meditation traditions detected with lagged coherence using EEG tomography

► Experienced meditators (Buddhists, QiGong, Sahaja Yoga, Ananda Marga Yoga, Zen). ► Intracortical lagged source coherence lower in meditation than rest before and after. ► All five meditation traditions and all EEG frequency bands showed similar results. ► Going into and out of meditation differed in EEG delta coherence topography. ► Reduced connectivity accounts for experiences such as 'all-oneness' and 'letting go'.