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<p>Below is the abstract from a study published in <em>Nature</em> magazine in 1982 by Herbert Benson and others on the Tibetan yogic practice of "inner heat" or Tummo (Tibetan: gtum mo). This was one of the first scientific studies which focused on the physiologic changes which accompany this practice. (Zach Rowinski 2005-01-11)</p> <p><strong>Author's Abstract:</strong> Since meditative practices are associated with changes that are consistent with decreased activity of the sympathetic nervous system, it is conceivable that measurable body temperature changes accompany advanced meditative states. With the help of H.H. the Dalai Lama, we have investigated such a possibility on three practitioners of the advanced Tibetan Buddhist meditational practice known as gTum-mo (heat) yoga living in Upper Dharamsala, India. We report here that in a study performed there in February 1981, we found that these subjects exhibited the capacity to increase the temperature of their fingers and toes by as much as 8.3?C.</p>

<p>Abstract The authors examined the effect of a 6-week mind/body intervention on college students' psychological distress, anxiety, and perception of stress. One hundred twenty-eight students were randomly assigned to an experimental group (n = 63) or a waitlist control group (n = 65). The experimental group received 6 90-minute group-training sessions in the relaxation response and cognitive behavioral skills. The Symptom Checklist-90-Revised, Spielberger State-Trait Anxiety Inventory, and the Perceived Stress Scale were used to assess the students' psychological state before and after the intervention. Ninety students (70% of the initial sample) completed the postassessment measure. Significantly greater reductions in psychological distress, state anxiety, and perceived stress were found in the experimental group. This brief mind/body training may be useful as a preventive intervention for college students, according to the authors, who called for further research to determine whether the observed treatment effect can be sustained over a longer period of time.</p>

<p>This experimental study looked at changes in the oscillation of heart rate of individuals doing Chinese Chi or Kundalini Yoga meditations. Heart rate oscillation during meditation was significantly greater than during the pre-meditation control measure as well as compared to three other comparison groups. The authors suggest that the results challenge the assumption of meditation as only an autonomically quiescent state. (Zach Rowinski 2005-03-05)</p>

High school students' self-esteem and locus of control were evaluated before, during, and after exposure to either a health curriculum based on elicitation of the relaxation-response with follow-up or a control health curriculum followed by the relaxation-response. The experimental group significantly increased self-esteem and internal locus of control. (SM)
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Previous research indicates that long-term meditation practice is associated with altered resting electroencephalogram patterns, suggestive of long lasting changes in brain activity. We hypothesized that meditation practice might also be associated with changes in the brain’s physical structure. Magnetic resonance imaging was used to assess cortical thickness in 20 participants with extensive Insight meditation experience, which involves focused attention to internal experiences. Brain regions associated with attention, interoception and sensory processing were thicker in meditation participants than matched controls, including the prefrontal cortex and right anterior insula. Between-group differences in prefrontal cortical thickness were most pronounced in older participants, suggesting that meditation might offset age-related cortical thinning. Finally, the thickness of two regions correlated with meditation experience. These data provide the first structural evidence for experience-dependent cortical plasticity associated with meditation practice.

Previous research indicates that long-term meditation practice is associated with altered resting electroencephalogram patterns, suggestive of long lasting changes in brain activity. We hypothesized that meditation practice might also be associated with changes in the brain’s physical structure. Magnetic resonance imaging was used to assess cortical thickness in 20 participants with extensive Insight meditation experience, which involves focused attention to internal experiences. Brain regions associated with attention, interoception and sensory processing were thicker in meditation participants than matched controls, including the prefrontal cortex and right anterior insula. Between-group differences in prefrontal cortical thickness were most pronounced in older participants, suggesting that meditation might offset age-related cortical thinning. Finally, the thickness of two regions correlated with meditation experience. These data provide the first structural evidence for experience-dependent cortical plasticity associated with meditation practice.
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<p>This chapter from the book <em>MindScience : An East-West Dialogue</em> is a record of a presentation given by Harvard doctor Herbert Benson during a conference between the Dalai Lama and psychologists, psychiatrists, neuroscientists, and psychobiologists at Harvard Medical School on March 24, 1991. The purpose of the conference, in part, was to share with the Dalai Lama and the medical community some of the scientific studies performed by Herbert Benson with Tibetan monks practicing "Tummo" (gtum mo) or the meditative generation of inner heat.</p> <p>Herbert Benson gives an account of his experiences and the scientific findings from studying the physiological effects of meditation, starting in 1967 with practitioners of transcendental meditation and then eventually working with Tibetan monks with an expertise in the practice of "inner heat" (gtum mo). He specifically discusses how these types of meditative practices can significantly increase or decrease metabolism. Dr. Benson describes the nature of the studies performed with Tibetan monks, including the specific physiological changes he measured such as skin temperature and oxygen consumption. He also gives a general overview of the medical understanding of temperature regulation, looking specifically at the how warm-blooded animals regulate temperature through (1) heat production and (2) heat conservation.</p> <p>Heat production can result through muscle activity and through chemical changes, such as chemical changes effected by the hormones epinephrine and thyroxin. Heat conservation is achieved in a variety of ways such as reducing the amount of skin exposure to the cold, piloerection (raising of hair, humans replace this by wearing clothing), and reducing blood flow to the extremities (where it will cool more rapidly). When put in a cold environment, the body naturally reduces blood flow to the extremities. However, practitioners of inner heat do the opposite: they increase the surface temperature of the skin. They also increase their metabolism.</p> <p>Dr. Benson also discusses how his studies on meditators, in general, relate to what he calls the "relaxation response." This system is the opposite of the "stress response" which is involved with physiological reactions of "fight-or-flight." Research on the relaxation response has opened the door for its use in clinical settings for treatment of hypertension, cardiac arrhythmias, chronic pain, insomnia, the side of effects of cancer and AIDS therapies, anxiety disorders, depression, menstrual tension and infertility, and is also being applied as a preparation for surgery.</p> <p>Finally, Dr. Benson answers questions from the audience on how his work relates to hypnosis, the treatment of cancer, the effect of meditation on blood carbon dioxide levels and blood pH, as well as other issues involved in the study of meditation. (Zach Rowinski 2005-01-04)</p>

When Dr. Herbert Benson introduced this simple, effective, mind/body approach to relieving stress twenty-five years ag, his book became an instant national bestseller. Since that time, millions of people have learned the secret--without high-priced lectures or prescription medicines. The Relaxation Response has become the classic reference recommended by most health care professionals and authorities to treat the harmful effects of stress.Discovered by Dr. Benson and his colleagues in the laboratories of Harvard Medical School and its teaching hospitals, this revitalizing, therapeutic approach is now routinely recommended to treat patients suffering from heart conditions, high blood pressure, chronic pain, insomnia, and many other physical ailments. It requires only minutes to learn, and just ten to twenty minutes of practice twice a day.
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<p>OBJECTIVES: The study objectives were to develop and objectively assess the therapeutic effect of a novel movement-based complementary and alternative medicine approach for children with an autism-spectrum disorder (ASD). DESIGN: A within-subject analysis comparing pre- to post-treatment scores on two standard measures of childhood behavioral problems was used. SETTINGS AND LOCATION: The intervention and data analysis occurred at a tertiary care, medical school teaching hospital. SUBJECTS: Twenty-four (24) children aged 3-16 years with a diagnosis of an ASD comprised the study group. INTERVENTION: The efficacy of an 8-week multimodal yoga, dance, and music therapy program based on the relaxation response (RR) was developed and examined. OUTCOME MEASURES: The study outcome was measured using The Behavioral Assessment System for Children, Second Edition (BASC-2) and the Aberrant Behavioral Checklist (ABC). RESULTS: Robust changes were found on the BASC-2, primarily for 5-12-year-old children. Unexpectedly, the post-treatment scores on the Atypicality scale of the BASC-2, which measures some of the core features of autism, changed significantly (p=0.003). CONCLUSIONS: A movement-based, modified RR program, involving yoga and dance, showed efficacy in treating behavioral and some core features of autism, particularly for latency-age children.</p>
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<p>The relaxation response (RR) is the counterpart of the stress response. Millennia-old practices evoking the RR include meditation, yoga and repetitive prayer. Although RR elicitation is an effective therapeutic intervention that counteracts the adverse clinical effects of stress in disorders including hypertension, anxiety, insomnia and aging, the underlying molecular mechanisms that explain these clinical benefits remain undetermined. To assess rapid time-dependent (temporal) genomic changes during one session of RR practice among healthy practitioners with years of RR practice and also in novices before and after 8 weeks of RR training, we measured the transcriptome in peripheral blood prior to, immediately after, and 15 minutes after listening to an RR-eliciting or a health education CD. Both short-term and long-term practitioners evoked significant temporal gene expression changes with greater significance in the latter as compared to novices. RR practice enhanced expression of genes associated with energy metabolism, mitochondrial function, insulin secretion and telomere maintenance, and reduced expression of genes linked to inflammatory response and stress-related pathways. Interactive network analyses of RR-affected pathways identified mitochondrial ATP synthase and insulin (INS) as top upregulated critical molecules (focus hubs) and NF-κB pathway genes as top downregulated focus hubs. Our results for the first time indicate that RR elicitation, particularly after long-term practice, may evoke its downstream health benefits by improving mitochondrial energy production and utilization and thus promoting mitochondrial resiliency through upregulation of ATPase and insulin function. Mitochondrial resiliency might also be promoted by RR-induced downregulation of NF-κB-associated upstream and downstream targets that mitigates stress.</p>
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<p>BACKGROUND: Many anecdotes and several uncontrolled case series have suggested that emotionally stressful events, and more specifically, anger, immediately precede and appear to trigger the onset of acute myocardial infarction. However, controlled studies to determine the relative risk of myocardial infarction after episodes of anger have not been reported. METHODS AND RESULTS: We interviewed 1623 patients (501 women) an average of 4 days after myocardial infarction. The interview identified the time, place, and quality of myocardial infarction pain and other symptoms, the estimated usual frequency of anger during the previous year, and the intensity and timing of anger and other potentially triggering factors during the 26 hours before the onset of myocardial infarction. Anger was assessed by the onset anger scale, a single-item, seven-level, self-report scale, and the state anger subscale of the State-Trait Personality Inventory. Occurrence of anger in the 2 hours preceding the onset of myocardial infarction was compared with its expected frequency using two types of self-matched control data based on the case-crossover study design. The onset anger scale identified 39 patients with episodes of anger in the 2 hours before the onset of myocardial infarction. The relative risk of myocardial infarction in the 2 hours after an episode of anger was 2.3 (95% confidence interval, 1.7 to 3.2). The state anger subscale corroborated these findings with a relative risk of 1.9 (95% confidence interval, 1.3 to 2.7). Regular users of aspirin had a significantly lower relative risk (1.4; 95% confidence interval, 0.8 to 2.6) than nonusers (2.9; 95% confidence interval, 2.0 to 4.1) (P&lt;.05). CONCLUSIONS: Episodes of anger are capable of triggering the onset of acute myocardial infarction, but aspirin may reduce this risk. A better understanding of the manner in which external events trigger the onset of acute cardiovascular events may lead to innovative preventive strategies aimed at severing the link between these external stressors and their pathological consequences.</p>
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