A self-referential default brain state: patterns of coherence, power, and eLORETA sources during eyes-closed rest and Transcendental Meditation practice.
Fred Travis, David A F Haaga, John Hagelin, Melissa Tanner, Alaric Arenander, Sanford Nidich, Carolyn Gaylord-King, Sarina Grosswald, Maxwell Rainforth, Robert H Schneider
Cognitive processing February 1, 2010 DOI: 10.1007/s10339-009-0343-2 (opens in new tab) via PubMed
Summary
AI-generated from the abstractA 10-week random assignment study of 38 college students (average age 23.7 years) compared EEG brainwave patterns during eyes-closed rest and Transcendental Meditation (TM) practice. During TM, compared to rest, there was higher alpha1 frontal log-power and lower beta1 and gamma frontal and parietal log-power; higher frontal and parietal alpha1 interhemispheric coherence and higher frontal and frontal-central beta2 intrahemispheric coherence. Sources of alpha1 activity were found in midline cortical regions overlapping the default mode network (DMN). Greater activation in DMN areas during TM suggests meditation may produce a foundational or 'ground' state of cerebral functioning that underlies both rest and focused cognition.
Study at a glance
| Characteristics | Randomized controlled trial Peer reviewed |
|---|---|
| Sample size | 38 |
| Population | Male and female college students, average age 23.7 years |
| Intervention | Transcendental Meditation |
| Duration | 10-week intervention |
| Key finding | Transcendental Meditation practice, compared to eyes-closed rest, led to higher alpha1 frontal power and greater activation in default mode network areas, suggesting a foundational cerebral state. |
Abstract
Activation of a default mode network (DMN) including frontal and parietal midline structures varies with cognitive load, being more active during low-load tasks and less active during high-load tasks requiring executive control. Meditation practices entail various degrees of cognitive control. Thus, DMN activation patterns could give insight into the nature of meditation practices. This 10-week random assignment study compared theta2, alpha1, alpha2, beta1, beta2 and gamma EEG coherence, power, and eLORETA cortical sources during eyes-closed rest and Transcendental Meditation (TM) practice in 38 male and female college students, average age 23.7 years. Significant brainwave differences were seen between groups. Compared to eyes-closed rest, TM practice led to higher alpha1 frontal log-power, and lower beta1 and gamma frontal and parietal log-power; higher frontal and parietal alpha1 interhemispheric coherence and higher frontal and frontal-central beta2 intrahemispheric coherence. eLORETA analysis identified sources of alpha1 activity in midline cortical regions that overlapped with the DMN. Greater activation in areas that overlap the DMN during TM practice suggests that meditation practice may lead to a foundational or 'ground' state of cerebral functioning that may underlie eyes-closed rest and more focused cognitive processes.