Shifting brain asymmetry: the link between meditation and structural lateralization

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neuroimaging

Background:

• Previous research indicates altered corpus callosum morphology in meditation practitioners.
• These callosal changes suggest potential shifts in inter-hemispheric integration and brain asymmetry.

Purpose of the Study:

• To investigate differences in gray matter asymmetry between long-term meditators and controls.
• To explore correlations between gray matter asymmetry and years of meditation practice.

Main Methods:

• Compared gray matter asymmetry in 50 long-term meditators and 50 controls using neuroimaging techniques.
• Analyzed correlations between asymmetry in specific brain regions and duration of meditation practice.

Main Results:

• Meditators showed decreased rightward asymmetry in the precuneus compared to controls.
• Increased leftward asymmetry near the posterior intraparietal sulcus positively correlated with meditation years.
• Exploratory analysis revealed a negative association between rightward asymmetry in the pregenual cingulate cortex and meditation years.

Conclusions:

• Findings suggest meditation-induced adaptations in the default mode network, evidenced by precuneus asymmetry.
• The correlation near the posterior intraparietal sulcus indicates meditation may influence attention processing.
• Brain asymmetry changes reflect neural plasticity associated with long-term meditation practice.