| Reference code: | PT/FB/BL-2006-044.07 |
| Location: | Arquivo PCA - Pasta 19/2006
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Title:
| Active intracerebral areas (EEG LORETA) in non-meditators and experienced meditators differ during resting
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| Publication year: | 2009
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URL:
| http://www.med.uni-giessen.de/physio/Kognitive_Neurophysiologie_2009_2_1.pdf
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| Abstract/Results: | ABSTRACT:
Do experienced meditators and meditation-naïve people have different brain functional states during no-task resting 19 channel EEG was recorded (versus average reference) from 8 QiGong meditators with 3. 30 years experience (mean 11.5+/-8.8) and 9 meditation-naïve controls (mean ages 41+/- 10 years (3 males), and 37+/-6 years (3 males), respectively) during eyes closed rest (sitting; meditators did not meditate). All artifact-free 2-second EEG epochs (mean 33.9+/-8.5/subject) were recomputed into intracortical 3 dimensional generator distributions using LORETA (2394 voxels) for each subject and each of the 8 EEG frequency bands. Results were normalized per frequency band and subject (total current density across all LORETA voxels scaled to 1). Current density of all voxels was tested (t tests) for differences between groups for each frequency band. An exceedance proportion test correcting for multiple testing identified voxels at p<0.05. Only differences in delta frequency band (1.5-6 Hz) were significant (355 voxels): 229 were stronger, 126 weaker in meditators than controls. All but 4 stronger voxels were in anterior areas (BA 9, 10, 11, 44, 45, 46, 47), 81 of them left, 144 right; all weaker voxels were in central-posterior areas (BA 4, 6, 7, 18, 19, 22, 30, 31, 32, 37, 39, 40), 107 of them left, 19 right. - In sum: during task-free resting, experienced meditators had different brain states compared to non-meditators. Meditators had stronger delta EEG activity than non meditators in frontal cortex (64% right hemisphere voxels), and weaker delta activity in central-posterior cortex (85% left hemisphere voxels). In view of the general assumption that EEG delta activity represents inhibition, experienced meditators have stronger inhibitory activity than controls anterior right-preponderant, and less inhibitory activity central-posterior predominantly left. These results suggest that meditators reduce internal information processing while enhancing input and output processing, an interpretation that agrees with the meditators’ subjective experience of disengaging from perceived information. (Partial support by Bial Grant No. 44 2006/2007.)
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| Accessibility: | Document exists in file (poster)
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Copyright/Reproduction:
| By permission
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Language:
| eng
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Notes:
| Abstract and respective poster in attachment |
| Author: | Faber, P.
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Secondary author(s):
| Tei, S., Lehmann, D., Gianotti, L., Tsujiuchi, T., Kumano, H., Kochi, K.
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Document type:
| Abstract
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Number of reproductions:
| 1
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Reference:
| Faber, P., Tei, S., Lehmann, D., Gianotti, L., Tsujiuchi, T., Kumano, H., & Kochi, K. (2009). Active intracerebral areas (EEG LORETA) in non-meditators and experienced meditators differ during resting. Kognitive Neurophysiologie des Menschen/ Human Cognitive Neurophysiology, 2(1), 9-10.
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| Indexed document: | No
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| Keywords: | Meditation / Qigong / Resting / LORETA / Electroencephalogram (EEG) / Brain states
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Active intracerebral areas (EEG LORETA) in non-meditators and experienced meditators differ during resting |