Kriya - EEG during Sudarshan Kriya .M Bhatia

Introduction Sudarshan Kriya (SK) (a rhythmic breathing process), was devised by Sri Sri Ravi Shankar. The word â?? Sudarshanâ?? translated from its original sanskrit Su = right, Darshan = vision, â??Kriyaâ?? means purifying action. This is thus not a pure meditation technique, and has been defined as a state of relaxation by some and a state of consciousness by others. This is practiced as a brief & practical self-help stressmanagement strategy. Subjective reports from the participants indicate that it reduces anxiety & depression and SK has been found to be useful in the treatment of depression. Various tools have been used to study the effect of relaxing techniques on the mind. These include EEG, evoked potentials (BAER, P300, Middle latency potentials), fMRI, SPECT. EEG has been used to study changes during meditation, and also long-term effect of regular practice of meditation for the past 2-3 decades. During Transcendental Meditation(TM)an increased regularity and amplitude of the alpha activity was noted. The results have been contradictory as different processes produce different changes. The changes observed have been linked to the type of meditation and duration of meditation practice, as subjects varied greatly in their meditation techniques, expertise and their performance. The difference in technique may produce a dichotomy of physiological effects. Most of the physiological research on meditation has been carried out on TM, it is not known whether other stylized practices create the same physiology. There are no reports at present on changes in EEG and SK. The aim of the present study was to study the sequential changes in EEG, during the SK.

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