Effectiveness of Meditation Techniques in Treating Post-Traumatic Stress Disorder: A Systematic Review and Meta-Analysis.

: Post-traumatic stress disorder (PTSD) is a debilitating condition worldwide. The limited effectiveness of current psychological and pharmacological treatments has motivated studies on meditation techniques. This study is a comprehensive, multiple-treatments meta-analysis comparing the effectiveness of different categories of meditation in treating PTSD.

Methodological concerns for meta-analyses of meditation: Comment on Sedlmeier et al. (2012).

We commend Sedlmeier et al. (2012) for their significant undertaking of meta-analysis of all meditation types on all psychological variables, but additional analyses may modify some of their conclusions. Whereas they suggest from visual inspection of funnel diagrams that there may be publication bias of underreporting low-effect studies on the Transcendental Meditation (TM) technique, quantitative tests do not indicate the presence of bias for any type of meditation.

Effects of the transcendental meditation technique on trait anxiety: a meta-analysis of randomized controlled trials.

Objective: This meta-analysis of randomized controlled trials (RCTs) on the Transcendental Meditation® (TM) technique updates previous meta-analyses and assesses the effects of initial anxiety level, age, duration of practice, regularity of practice, research quality, author affiliation, and type of control group on effect sizes.

Design: This systematic review of the literature used the Comprehensive Meta-Analysis (CMA) program for core analyses of effect sizes, bias analysis, meta-regression, and moderator variable analysis. Comprehensive literature searches included databases devoted to meditation research.

Prevention and Treatment of Cardiovascular Disease in Adolescents and Adults through the Transcendental Meditation(®) Program: A Research Review Update.

The pathogenesis and progression of cardiovascular diseases are thought to be exacerbated by stress. Basic research indicates that the Transcendental Meditation(®) technique produces acute and longitudinal reductions in sympathetic tone and stress reactivity. In adolescents at risk for hypertension, the technique has been found to reduce resting and ambulatory blood pressure, left ventricular mass, cardiovascular reactivity, and to improve school behavior.

Commentary on the AHRQ report on research on meditation practices in health.

The Agency for Healthcare Research and Quality (AHRQ) report is a major reference point for establishing where the research on meditation stands and where it should go from here. This commentary argues that double blinding, a major component of the report's evaluation criteria, is not an appropriate control for placebo in meditation research. A viable alternative is to make the treatment and control groups equivalent on nonspecific therapeutic attention factors and expectation.

Neuroimaging of meditation's effect on brain reactivity to pain.

Some meditation techniques reduce pain, but there have been no studies on how meditation affects the brain's response to pain. Functional magnetic resonance imaging of the response to thermally induced pain applied outside the meditation period found that long-term practitioners of the Transcendental Meditation technique showed 40-50% fewer voxels responding to pain in the thalamus and total brain than in healthy matched controls interested in learning the technique. After the controls learned the technique and practiced it for 5 months, their response decreased by 40-50% in the thalamus, prefrontal cortex, total brain, and marginally in the anterior cingulate cortex.

Clinical and Pre-clinical Applications of the Transcendental Meditation Program in the Prevention and Treatment of Essential Hypertension and Cardiovascular Disease in Youth and Adults.

Acute and chronic environmental and psychosocial stress contributes to the pathogenesis and progression of cardiovascular diseases (CVD). Stress reduction via Transcendental Meditation (TM)® has been shown to lower blood pressure (BP) levels and reduce CVD risk in adults and adolescents. This article reviews recent findings indicating a beneficial BP-lowering impact of TM in hypertensive adults at rest and in pre-hypertensive adolescents at rest, during acute laboratory stress and during normal daily activity.

A randomized controlled trial of stress reduction in African Americans treated for hypertension for over one year.

Background: Psychosocial stress has been implicated in the disproportionately higher rates of hypertension among African Americans. This randomized controlled trial compared the effects of two stress reduction techniques and a health education control program on hypertension during a period of 1 year in African-American men and women (N = 150, mean age 49 +/- 10 years, mean blood pressure (BP) = 142/95 mm Hg) at an urban community health center.

Methods: Interventions included 20 min twice a day of Transcendental Meditation (TM) or progressive muscle relaxation (PMR), or participation in conventional health education (HE) classes.