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Home Exclusive Meditation

Meditation and yoga practice linked to reduced volume in brain region tied to negative emotions

by Eric W. Dolan
August 18, 2019
in Meditation, Mental Health
(Photo credit: Life Science Databases)

(Photo credit: Life Science Databases)

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Meditation and yoga practice is associated with smaller right amygdala volume, a brain region involved in emotional processing, according to research published in Brain Imaging and Behavior.

For their study, the researchers analyzed data that had been collected during the Rotterdam Study, an ongoing population-based study that has been conducted in The Netherlands since 1990. The study has recruited more than 15,000 subjects aged 45 years or over.

The researchers were particularly interested in a subgroup of 3,742 participants who had responded to a meditation and yoga practice questionnaire and had undergone an MRI of the brain. Many of the participants underwent multiple brain scans, allowing the researchers to examine structural change over time.

The researchers found that meditation and yoga was positively related both to stress and coping with stress. Participants who reported practicing meditation and yoga tended to also report experiencing more stress. But 90.7% of practitioners also reported that meditation and yoga helped them cope with stress.

Participants who reported practicing meditation and yoga also tended to have smaller right amygdala and left hippocampal volume compared to those not practicing — and right amygdala volume tended to decrease over time among practitioners. Research suggests the right amygdala controls fear and aversion to unpleasant stimuli.

“Volumetric differences were only found in the right amygdala, not in the left. This is in line with previous smaller studies and is explained by the fact that the right amygdala, as opposed to the left amygdala, is associated with negative emotions and immediate action taking, whereas the left is associated with positive emotions and memory,” the researchers wrote in their study.

The findings could indicate that “that meditation and yoga practitioners have become more aware of their stress, but are at the same time more able to deal with it hence the smaller amygdala volume,” the researchers explained.

The results are in line with previous research that found meditation training could produce a generalized reduction in right amygdala activity in response to emotional stimuli, as measured by brain scans.

But the new study — like all research — includes some limitations.

“Although performed in a very large population-based sample, this is still a selection of participants that are generally healthy and motivated to join research,” the researchers noted. “Furthermore, this study contains mainly elderly individuals, who may not be as actively involved in meditation and yoga practices as younger people might, and who also might show a different structural response than younger participants due to decreased brain plasticity.”

The study, “Meditation and yoga practice are associated with smaller right amygdala volume: the Rotterdam study“, was authored by Rinske A. Gotink, Meike W. Vernooij, M. Arfan Ikram, Wiro J. Niessen, Gabriel P. Krestin, Albert Hofman, Henning Tiemeier, and M. G. Myriam Hunink.

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