EEG paroxysmal gamma waves during Bhramari Pranayama: a yoga breathing technique.


Here we report that a specific form of yoga can generate controlled high-frequency gamma waves. For the first time, paroxysmal gamma waves (PGW) were observed in eight subjects practicing a yoga technique of breathing control called Bhramari Pranayama (BhPr). To obtain new insights into the nature of the EEG during BhPr, we analyzed EEG signals using time-frequency representations (TFR), independent component analysis (ICA), and EEG tomography (LORETA). We found that the PGW consists of high-frequency biphasic ripples. This unusual activity is discussed in relation to previous reports on yoga and meditation. It is concluded this EEG activity is most probably non-epileptic, and that applying the same methodology to other meditation recordings might yield an improved understanding of the neurocorrelates of meditation.

DOI: 10.1016/j.concog.2008.01.004

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@article{Vialatte2009EEGPG, title={EEG paroxysmal gamma waves during Bhramari Pranayama: a yoga breathing technique.}, author={François B. Vialatte and Hovagim Bakardjian and Rajkishore Prasad and Andrzej Cichocki}, journal={Consciousness and cognition}, year={2009}, volume={18 4}, pages={977-88} }