Dynamics of Interaction of Neural Networks in the Course of EEG Alpha Biofeedback.
L I Kozlova, D D Bezmaternykh, M E Mel'nikov, A A Savelov, E D Petrovskii, M B Shtark
Bulletin of experimental biology and medicine March 2017 DOI: 10.1007/s10517-017-3671-8 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Observational study Peer reviewed |
|---|---|
| Sample size | 14 |
| Population | Healthy men aged 20-35 years |
| Duration | 20 sessions; recordings at the beginning, middle, and end of the course |
| Measures | EEG-fMRI functional connectivity |
| Keywords | EEG Alpha Rhythm EEG-FMRI Mapping Biofeedback Neural networks |
| Key findings | During EEG alpha biofeedback training, functional connectivity increased between the precuneus network and the anterior salience, left executive control, default mode, and primary visual networks, and between the anterior salience network and the executive control and visual-spatial networks. The authors suggest the prominent involvement of the precuneus and anterior salience networks may reflect their key role in the biofeedback phenomenon. Synchronicity in these networks increased from the first to the third trial, while right-left executive control network connectivity weakened from the first to the second session. |
Abstract
Brain EEG-fMRI activity was studied in subjects, who had successfully completed the EEG alpha stimulating training course (20 sessions): for 14 healthy men (20-35 years) three records were obtained in the feedback loop (biofeedback with EEG alpha rhythm with sound reinforcement): in the beginning, middle and at the end of the course. During alpha training, increased functional connectivity was revealed between precuneus network and anterior salience network, left executive control network, default mode network, primary visual network; anterior salience network and executive control network, visual-spatial network. The most prominent changes were found for precuneus network and anterior salience network, which could be due to their key role in the biofeedback phenomenon. Significant changes in functional connectivity were recorded for anterior salience network and precuneus network (synchronicity increased from the first to the third trial) and right and left executive control networks (weakening from the first to the second session.