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Related Experiment Video

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Combining Transcranial Magnetic Stimulation and fMRI to Examine the Default Mode Network
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Meditation leads to reduced default mode network activity beyond an active task.

Kathleen A Garrison1, Thomas A Zeffiro, Dustin Scheinost

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Meditation reduces default mode network activity more than typical active tasks. This study in a larger group confirms meditation

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neuroimaging

Background:

  • The default mode network (DMN) is linked to self-referential thought and mind-wandering.
  • Previous studies often compared meditation to rest, overlooking baseline differences between meditators and controls.
  • Resting-state brain activity varies, necessitating comparison with active cognitive tasks.

Purpose of the Study:

  • To replicate findings of reduced DMN activity during meditation.
  • To investigate if meditation reduces DMN activity beyond other active tasks.
  • To examine these effects in a larger participant group.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants included long-term meditators and control groups.
  • Brain activity during meditation was compared to an active cognitive task and rest.

Main Results:

  • Meditation was associated with significantly reduced DMN activity compared to an active task in meditators versus controls.
  • Key DMN regions, including the posterior cingulate/precuneus and anterior cingulate cortex, showed reduced activation during meditation.
  • These reductions exceeded those observed during another effortful cognitive task.

Conclusions:

  • Reduced DMN processing is a key neural mechanism in long-term meditation.
  • Meditation offers a distinct state of reduced self-referential thought compared to other cognitive tasks.
  • These findings highlight meditation's unique impact on brain function related to mind-wandering.