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Updated: May 20, 2026

Combining Transcranial Magnetic Stimulation and fMRI to Examine the Default Mode Network
Published on: December 28, 2010
Emerging roles of the brain's default network
1Laboratory for Neuro- and Psychophysiology, KU Leuven Medical School, Leuven, Belgium.
The brain's default network is active during rest, supporting both spontaneous thought and environmental monitoring. These functions are not mutually exclusive but complementary aspects of conscious experience during inactivity.
Area of Science:
- Neuroscience
- Cognitive Science
Background:
- The default network (DN) is a set of brain regions consistently active during rest.
- Its precise functions remain debated, with proposed roles including spontaneous cognition and environmental monitoring.
Purpose of the Study:
- To review and integrate current literature on the default network's functions.
- To propose a unified view of the DN's role during periods of inactivity.
Main Methods:
- Review of functional neuroimaging studies.
- Analysis of electrophysiological data.
- Integration of findings from cognitive neuroscience literature.
Main Results:
- The default network exhibits consistent activity during rest, not a decrease in global metabolism.
- Evidence suggests the DN supports both internal thought processes and external environmental monitoring.
- These two functions are proposed to be complementary, not contradictory.
Conclusions:
- The default network's functions of spontaneous cognition and environmental monitoring are reconcilable.
- These complementary functions contribute to conscious experience during idle moments.
- A unified understanding of the DN supports its role in adaptive cognitive processing during rest.
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