Reduced age-associated brain changes in expert meditators: a multimodal neuroimaging pilot study

Area of Science:

• Neuroscience
• Aging Research
• Cognitive Science

Background:

• Aging is linked to decreased brain volume and metabolism, with stress and poor sleep worsening these changes and increasing Alzheimer's risk.
• Meditation practices aim to reduce stress and regulate emotions, potentially counteracting age-related brain decline.

Purpose of the Study:

• To investigate if lifelong meditation practice can mitigate age-associated structural and functional brain changes.
• To compare brain imaging data (structural MRI and FDG-PET) between elderly expert meditators and controls.

Main Methods:

• Pilot study comparing 6 elderly expert meditators with 67 elderly controls.
• Utilized structural Magnetic Resonance Imaging (MRI) for gray matter volume and Fluorodeoxyglucose-Positron Emission Tomography (FDG-PET) for glucose metabolism.
• Analyzed age-related changes in a larger cohort (186 controls aged 20-87 years).

Main Results:

• Elderly expert meditators exhibited increased gray matter volume and/or FDG metabolism in specific brain regions, including the ventromedial prefrontal cortex, anterior cingulate cortex, insula, temporo-parietal junction, and posterior cingulate cortex/precuneus.
• These regions in meditators mirrored areas most affected by aging in the larger control cohort.
• Findings persisted after adjusting for lifestyle factors and using matched controls.

Conclusions:

• Meditation practice may reduce age-associated structural and functional brain changes.
• These preliminary findings suggest a potential neuroprotective effect of long-term meditation.
• Further research with larger cohorts and longitudinal studies is warranted to confirm these results.