This study demonstrates a skin temperature reduction on the palms of the hands during the experience of mental silence, arising as a result of a single 10 minute session of Sahaja yoga meditation. However when people (non-meditators) were asked to do a simple relaxation exercise, under the same conditions, their skin temperature increased which is the opposite of what occured for those using the mental silence approach to meditation.
The outcomes of this study therefore suggest that “thoughtless awareness” may be both experientially and physiologically different to simple relaxation. Interestingly, all other studies of meditation that have studied skin temperature show changes similar to that of relaxation (ie that skin temperature rises) and none show reductions, adding further scientific weight to the idea that the mental silence definition of meditation may well be the best way to differentiate meditation from relaxation, hypnosis, sleep and other forms of behavior therapy!
Manocha R, Black D, Ryan J, Stough C, Spiro D, Changing Definitions of Meditation: Physiological Corollorary, Journal of the International Society of Life Sciences, Vol 28 (1), Mar 2010
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