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Mindfulness-Based Stress Reduction-related changes in posterior cingulate resting brain connectivity.

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Mindfulness-Based Stress Reduction (MBSR) increases brain connectivity between executive control and default mode networks. This change is linked to practice time, attention, and white matter structure.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Mindfulness Research

Background:

  • Mindfulness meditation training enhances functional connectivity in brain networks.
  • The frontoparietal executive control network (dorsolateral prefrontal cortex [DLPFC]) and default mode network (posterior cingulate cortex [PCC]) are key targets.
  • Generalizability of these effects to structured programs like Mindfulness-Based Stress Reduction (MBSR) requires investigation.

Purpose of the Study:

  • To determine if MBSR training enhances resting-state functional connectivity between PCC and DLPFC.
  • To examine structural and behavioral consequences of changes in PCC-DLPFC connectivity.
  • To assess the relationship between practice duration and connectivity changes.

Main Methods:

  • Randomized controlled trial comparing MBSR, an active control, and a waitlist control group.
  • Resting-state fMRI and diffusion tensor imaging were used to assess brain connectivity.
  • Behavioral testing and self-report measures were administered at multiple time points.

Main Results:

  • MBSR significantly increased PCC-DLPFC resting-state functional connectivity compared to control groups immediately post-intervention.
  • These connectivity gains did not persist at long-term follow-up.
  • MBSR participants showed a stronger association between practice duration and increased PCC-DLPFC connectivity.
  • Increased PCC-DLPFC connectivity correlated with enhanced white matter microstructural connectivity and self-reported attention.

Conclusions:

  • MBSR training effectively enhances PCC-DLPFC resting-state functional connectivity.
  • The degree of connectivity increase is positively related to practice time and associated with improved attention and structural connectivity.
  • These findings highlight MBSR's impact on neural networks supporting executive function and attention.