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Mario Beauregard

Université de Montréal

2 papers in the library · 382 citations · publishing 2009-2012

Papers

Impact of meditation training on the default mode network during a restful state

Social Cognitive and Affective Neuroscience March 24, 2012 Véronique A. Taylor, Véronique Daneault, Joshua A. Grant et al. 317 citations

Experienced meditators with over 1000 hours of training show weaker functional connectivity between default mode network (DMN) regions involved in self-referential processing and emotional appraisal compared to beginners with no prior experience. They also show increased connectivity between certain DMN regions, such as the dorso-medial prefrontal cortex and right inferior parietal lobule. These resting-state functional connectivity changes suggest that extensive meditation training may strengthen present-moment awareness by altering how core DMN regions communicate, even when not actively meditating.

Brain activity in near-death experiencers during a meditative state

Resuscitation July 2, 2009 Mario Beauregard, Jérôme Courtemanche, Vincent Paquette 65 citations

Near-death experiencers who mentally visualize and emotionally connect with the 'being of light' they encountered during their experience show distinct brain activity compared to visualizing a lamp's light. Functional MRI reveals activation in regions linked to positive emotions, visual imagery, attention, and spiritual experiences, including the right brainstem, orbitofrontal and prefrontal cortices, insula, and temporal areas. EEG recordings show greater theta, alpha, and gamma power at multiple electrode sites across frontal, temporal, parietal, and occipital regions during the meditation condition. These findings suggest that recalling a near-death experience involves measurable neural changes in emotion and imagery networks.