EEG dynamics of spontaneous stimulus-independent thoughts
Andrey V. Bocharov, Gennady G. Knyazev, Alexander Nikolaevich Savostyanov, Tatiana Astakhova, Sergey Tamozhnikov
Cognitive Neuroscience October 10, 2018 DOI: 10.1080/17588928.2018.1534820 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Observational study using EEG with independent component analysis and dipole localization Peer reviewed |
|---|---|
| Sample size | 30 |
| Population | Healthy participants |
| Citations | 18 |
| Key findings | Self-referential thoughts, compared with non-self-referential thoughts, were accompanied by more pronounced decreases in theta, alpha, and beta spectral power in the anterior hub of the default-mode network and in the left lateral prefrontal, motor/somatosensory, and temporal cortices. The authors interpret these oscillatory dynamics as a reflection of autobiographical memory retrieval intrinsic to self-referential thoughts. |
Abstract
In this study, we aimed to compare the oscillatory dynamics accompanying self-referential and non-self-referential stimulus-independent thoughts. Electroencephalograms were recorded in 30 healthy participants who were asked to press buttons classifying their spontaneous thoughts as self-referential or non-self-referential. EEG data were analyzed using independent component analysis in conjunction with dipole localization. Self-referential thoughts, as compared to non-self-referential thoughts, were accompanied by more pronounced decreases of theta, alpha, and beta spectral power in the anterior hub of the default-mode network, in the left lateral prefrontal, motor/somatosensory, and temporal cortices. These oscillatory dynamics are interpreted as a reflection of autobiographical memory retrieval intrinsic to self-referential thoughts. Abbreviations: BA: Brodmann area; BOLD: blood oxygenation level-dependent; DMN: default mode network; EEG: electroencephalogram; ERSP: event-related spectral perturbations; fMRI: functional magnetic resonance imaging; PCC: posterior cingulate cortex; PET: positron emission tomography; PFC: prefrontal cortex; SIT: stimulus-independent thought; WM: working memory.
Citations in the library
Cites 7
- A default mode of brain function Proceedings of the National Academy of Sciences January 16, 2001
- Experience sampling during fMRI reveals default network and executive system contributions to mind wandering. Proceedings of the National Academy of Sciences May 26, 2009
- The wandering brain: Meta-analysis of functional neuroimaging studies of mind-wandering and related spontaneous thought processes Neuroimage February 25, 2015
- Frontal theta EEG activity correlates negatively with the default mode network in resting state International Journal of Psychophysiology July 13, 2007
- Cooperation between the default mode network and the frontal–parietal network in the production of an internal train of thought Brain Research April 15, 2011
and 2 more in the library