Meditation Shown to Alter Gray Matter in Brain
Posted: January 24, 2015 at 8:49 pm
By Traci Pedersen Associate News Editor Reviewed by John M. Grohol, Psy.D. on January 24, 2015 ~ 1 min read
Meditating for just eight weeks has been shown to alter the brains gray matter, which may be at least part of the reason why practitioners experience significant improvements in memory, sense of self, empathy, and stress, according to a new study led by Harvard researchers at Massachusetts General Hospital (MGH).
Although the practice of meditation is associated with a sense of peacefulness and physical relaxation, practitioners have long claimed that meditation also provides cognitive and psychological benefits that persist throughout the day, saidsenior author Dr. Sara Lazar of the MGH Neuroimaging Research Program and a Harvard Medical School instructor in psychology.
This study demonstrates that changes in brain structure may underlie some of these reported improvements and that people are not just feeling better because they are spending time relaxing.
Previous research has shown structural differences between the brains of experienced meditation practitioners and those with no history of meditation, including a thickening of the cerebral cortex in areas associated with attention and emotional integration. However, in those studies, the researchers could not determine whether those differences were actually caused by meditation.
For the current study, 16 study participants completed an eight-week Mindfulness-Based Stress Reduction (MBSR) Program at the University of Massachusetts Center for Mindfulness. Two weeks before and two weeks after the program, researchers took pictures of their brains using magnetic resonance imaging (MRI).
Subjects participated in weekly meetings that included the practice of mindfulness meditation which focuses on nonjudgmental awareness of sensations, feelings, and state of mind. They also were given audio recordings for guided meditation practice in which they were asked to keep track of how much time they practiced each day.
A set of MR brain images was also taken of a control group of non-meditators over a similar time interval.
Meditation group participants reported spending an average of 27 minutes each day practicing mindfulness exercises. Their responses to a mindfulness questionnaire showed significant improvements compared with their pre-meditation responses.
The analysis of MR images also showed increased gray-matter density in the hippocampus, known to be important for learning and memory, and in structures tied to self-awareness, compassion, and introspection.
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Meditation Shown to Alter Gray Matter in Brain
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