As promised following are some abstracts of research on TM published in the
International Journal of Neuroscience
2006, Vol. 116, No. 12 , Pages 1519-1538 (doi:10.1080/00207450600575482)
CROSS-SECTIONAL AND LONGITUDINAL STUDY OF EFFECTS OF TRANSCENDENTAL MEDITATION PRACTICE ON INTERHEMISPHERIC FRONTAL ASYMMETRY AND FRONTAL COHERENCE
Two studies investigated frontal alpha lateral asymmetry and frontal interhemispheric coherence during eyes-closed rest, Transcendental Meditation (TM) practice, and computerized reaction-time tasks. In the first study, frontal coherence and lateralized asymmetry were higher in 13 TM subjects than in 12 controls. In the second study (N = 14), a one-year longitudinal study, lateral asymmetry did not change in any condition. In contrast, frontal coherence increased linearly during computer tasks and eyes-closed rest, and as a step-function during TM practice?rising to a high level after 2-months TM practice. Coherence was more sensitive than lateral asymmetry to effects of TM practice on brain functioning.
Short-Term Longitudinal Effects of the Transcendental Meditation Technique on EEG Power and Coherence
1981, Vol. 14, No. 3-4 , Pages 147-151
EEG alpha coherence and slow alpha power were recorded from frontal and occipital derivations during relaxation or the Transcendental Meditation (TM) technique in fifteen subjects. Subjects were tested before and after a two-week baseline period in which half practiced twice daily relaxation and half did not change their schedule. All subjects were then instructed in the TM technique and retested after a two-week period of twice daily practice of the technique. During the first two-week period there were no group differences or group by session interactions, but there was a significant effect of repeated measurement, indicating a decrease in occipital power independent of group. After the two-week TM technique period, subjects showed a significant increase in frontal alpha coherence above a 0.95 threshold. Frontal alpha coherence was found to be a more sensitive discriminator of the TM technique than alpha power, which may clarify previously reported nonsignificant EEG differences between the TM technique and general relaxation.
Participation in the transcendental meditation program and frontal eeg coherence during concept learning
1986, Vol. 29, No. 1-2 , Pages 45-55
This study assesses variation in frontal bilateral EEG coherence among normal subjects during trials of a concept learning task; the task used a concept-reversal paradigm found from prior research to distinguish frontal lobe patients from normal adults. Subjects were either participants in the Transcendental Meditation (TM) program or controls matched for age, sex, and intellectual ability, and additional experimental factors were whether or not the subject gained information on a given trial and whether or not the trial occurred before, during, or after the shift of concept. It was hypothesized that: (1) higher frontal EEG coherence (alpha and beta frequencies) would be associated with trials on which information was gained; (2) higher coherence in the same frequencies would be found in the two concept-solution periods in contrast to the concept-reversal period that divided them; and (3) these patterns would be more clearly expressed among TM program participants. Each hypothesis received partial support. The first hypothesis was true only for TM program participants for alpha coherence, and only during the first concept-solution period for beta coherence. The second hypothesis was true for alpha coherence only, and the third hypothesis received support for alpha coherence. Results were not attributable to muscle or eye artifacts. However, a different response style was found to the change in concept among the two groups; control subjects displayed greater arousal (muscle artifact) during the concept-reversal period, while TM program participants displayed less arousal.
Effectiveness of the Transcendental Meditation Program in Preventing and Treating Substance Misuse: A Review
1991, Vol. 26, No. 3 , Pages 293-325
This article reviews 24 studies on the benefits of Transcendental Meditation (TM) in treating and preventing misuse of chemical substances. Studies cover noninstitutionalized users, participants in treatment programs, and prisoners with histories of heavy use. All the studies showed positive effects of the TM program. Some of the survey-type studies were unable to exclude the possibility of self-selection or responder biases. However, longitudinal, random-assignment studies with objective measures also showed positive results. Taken together, these and other studies indicate the program simultaneously addresses several factors underlying chemical dependence, providing not only immediate relief from distress but also long-range improvements in well-being, self-esteem, personal empowerment, and other areas of psychophysiological health.