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Long-term practice of traditional South Asian meditation techniques, be they of Buddhist or Vedic origin, result in changes in cognitive style consistent with the development of a more balanced and stable mode of awareness, characterized by increased wakefulness, and simultaneous sensitivity to outer stimuli and inner patterns of cognitive and mental processing. Such changes are consistent with improved mental health
Transcendental Meditation techniques, in particular, yield results now described in terms of development of ‘total brain function’, because of all-round development in so many areas, and because EEG is activated over the entire cortex.
The studies of the Tibetan Buddhist, one-point technique (concentration) (13,14) and the compassion technique (contemplation) (13,42) show psychophysiological effects contrasting with those on TM (18, 52) exemplifying the idea that: different techniques produce different effects: Is the opposite assumption not unfortunate?
In the western world, studies of long-term meditators engaged in busy professional lives have observed significant health expenditure reductions (2,3). Reduced insurance costs of 50% averaged over all disease categories were observed in a retrospective study (2), following which a prospective study found costs incurred through General Practitioners to go down by 7% per year relative to controls for the first several years of practice (3). This suggests that the full 50% reduction may take some 7 or so years to develop. Of particular significance was that long-term heart disease costs reduced by 87%
The participants in the mindfulness meditation program reported lower levels of fatigue and depression for up to six months than those receiving standard care. And the meditation participants had better quality of life, according to the study findings, published in the Sept. 28 issue of the journal Neurology.
The scans revealed significant activity in the insula - a region near the frontal portion of the brain that plays a key role in bodily representations of emotion - when the long-term meditators were generating compassion and were exposed to emotional vocalizations. The strength of insula activation was also associated with the intensity of the meditation as assessed by the participants.
"The insula is extremely important in detecting emotions in general and specifically in mapping bodily responses to emotion - such as heart rate and blood pressure - and making that information available to other parts of the brain," says Davidson, also co-director of the HealthEmotions Research Institute. Activity also increased in the temporal parietal juncture, particularly the right hemisphere. Studies have implicated this area as important in processing empathy, especially in perceiving the mental and emotional state of others.
"Both of these areas have been linked to emotion sharing and empathy," Davidson says. "The combination of these two effects, which was much more noticeable in the expert meditators as opposed to the novices, was very powerful."
Pierre Rainville, a researcher at the University of Montreal, and his colleagues report their findings in the journal Pain.
"Our previous research found that Zen meditators have lower pain sensitivity," said senior author Rainville in a news release from the journal. "The aim of the current study was to determine how they are achieving this." "Using functional magnetic resonance imaging [MRI], we demonstrated that although the meditators were aware of the pain, this sensation wasn't processed in the part of their brains responsible for appraisal, reasoning or memory formation," Rainville noted. "We think that they feel the sensations, but cut the process short, refraining from interpretation or labeling of the stimuli as painful."
"Our findings lead to new insights into mind/brain function," study first author Joshua Grant, a doctoral student at the university, said in the same news release. "These results challenge current concepts of mental control, which is thought to be achieved by increasing cognitive activity or effort. Instead, we suggest it is possible to self-regulate in a more passive manner, by turning off certain areas of the brain, which in this case are normally involved in processing pain."