Fig. 1: Protocol and analysis.
From: Unlocking deep relaxation: the power of rhythmic breathing on brain rhythms
a Protocol for breath-based meditation. EEG was recorded in a 10/20 arrangement from participants undergoing the various steps in the Sudarshan Kriya Yoga (SKY) meditation which involved pranayama based breathing exercise for 15 min (the first 9 min analyzed in the paper) followed by the rhythmic breathing (kriya) followed by rest in the sitting position. Pre and post the meditation data recording represents resting state activity. b Analysis method: After data cleaning and preprocessing, spectral properties including the delta, theta, and alpha peak frequency, amplitude, and bandwidth were extracted along with aperiodic signal characteristics using the FOOOF toolbox. The diagram illustrates relevant features extracted from the frequency spectrum.
