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Structural changes in socio‐affective networks: Multi‐modal MRI findings in long‐term meditation practitioners

Haakon Engen, Boris C. Bernhardt, Leon Skottnik, Matthieu Ricard, Tania Singer

Neuropsychologia August 31, 2017 DOI: 10.1016/j.neuropsychologia.2017.08.024 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Cross-sectional study Longitudinal Peer reviewed
Population Long-term meditation practitioners (LTMs) and meditation-naïve controls
Duration Average of 40,000 hours of practice
Topics Meditation
Key findings Long-term meditation practitioners showed increased cortical thickness in fronto-insular regions and overlapping fMRI amplitude increases during loving-kindness meditation.

Abstract

ABSTRACT Our goal was to assess the effects of long‐term mental training in socio‐affective skills on structural brain networks. We studied a group of long‐term meditation practitioners (LTMs) who have focused on cultivating socio‐affective skills using loving‐kindness and compassion meditation for an average of 40k h, comparing these to meditation‐naïve controls. To maximize homogeneity of prior practice, LTMs were included only if they had undergone extensive full‐time meditation retreats in the same center. MRI‐based cortical thickness analysis revealed increased thickness in the LTM cohort relative to meditation‐native controls in fronto‐insular cortices. To identify functional networks relevant for the generation of socio‐affective states, structural imaging analysis were complemented by fMRI analysis in LTMs, showing amplitude increases during a loving‐kindness meditation session relative to non‐meditative rest in multiple prefrontal and insular regions bilaterally. Importantly, functional findings partially overlapped with regions of cortical thickness increases in the left ventrolateral prefrontal cortex and anterior insula, suggesting that these regions may play a central role in the generation of emotional states relevant for the meditative practice. Our multi‐modal MRI approach revealed structural changes in LTMs who have cultivated loving‐kindness and compassion for a significant period of their life in functional networks activated by these practices. These preliminary cross‐sectional findings motivate future longitudinal work studying brain plasticity following the regular practice of skills aiming at enhancing human altruism and prosocial motivation. HIGHLIGHTSMultimodal MRI in long‐term meditators (LTMs) and meditation‐naïve controls.Cortical thickening in LTMs vs controls in fronto‐insular regions.Overlap with fMRI amplitude increases during loving‐kindness meditation in LTMs.Findings motivate longitudinal studies addressing training‐related plasticity.

Comparable studies

Other cross-sectional and survey studies on meditation, most cited first.

Study Year Design Participants
Construct Validity of the Five Facet Mindfulness Questionnaire in Meditating and Nonmeditating Samples Experienced meditators and nonmeditating comparison groups 2008 Cross-sectional study
Neural Correlates of Dispositional Mindfulness During Affect Labeling Adult participants 2007 Observational cross-sectional n = 27
Assessing mindfulness in children and adolescents: Development and validation of the Child and Adolescent Mindfulness Measure (CAMM). School-aged children and adolescents 2011 Cross-sectional validation study n = 1,413
Mindfulness and self-compassion as predictors of psychological wellbeing in long-term meditators and matched nonmeditators Experienced meditators and demographically matched nonmeditators 2012 Cross-sectional study n = 152
Mechanisms of Action in the Inverse Relationship Between Mindfulness and Psychological Distress Undergraduates 2008 Cross-sectional, correlational

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