Religious Chanting and Self-Related Brain Regions: A Multi-Modal Neuroimaging Study

Area of Science:

• Neuroscience
• Cognitive Science
• Religious Studies

Background:

• Repetitive religious chanting is a widespread mind training practice across cultures.
• Understanding the neural mechanisms of chanting is crucial for research into meditation and religious practices.
• Existing neuroimaging techniques have limitations in capturing dynamic brain activity during such practices.

Purpose of the Study:

• To present a multi-modal neuroimaging protocol for studying brain activity during religious chanting.
• To identify specific brain regions and activity patterns associated with repetitive religious chanting.
• To enhance the precision of electroencephalogram (EEG) source localization using functional magnetic resonance imaging (fMRI).

Main Methods:

• Utilized high-density electroencephalogram (EEG) for temporal dynamics of brain activity.
• Employed functional magnetic resonance imaging (fMRI) from one experienced practitioner to guide EEG source localization.
• Applied K-means clustering to EEG source localization data from 20 practitioners.

Main Results:

• Identified the posterior cingulate cortex (PCC) as a key brain region involved in religious chanting.
• Observed decreased centrality and increased delta-wave power during religious chanting compared to controls.
• Demonstrated that combining fMRI and EEG improves the accuracy of identifying brain regions engaged during chanting.

Conclusions:

• Repetitive religious chanting modulates brain activity, particularly involving the PCC.
• The multi-modal approach provides a more detailed understanding of the neural correlates of religious and meditative practices.
• Findings have implications for developing neurofeedback and psychological interventions.