Role of the default mode network in cognitive transitions
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Publication Date
2018-10-01Journal Title
Cerebral Cortex
ISSN
1460-2199
Publisher
OUP
Volume
28
Issue
10
Pages
3685-3696
Language
eng
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Smith, V., Mitchell, D., & Duncan, J. (2018). Role of the default mode network in cognitive transitions. Cerebral Cortex, 28 (10), 3685-3696. https://doi.org/10.1093/cercor/bhy167
Abstract
A frequently repeated finding is that the default mode network (DMN) shows activa-tion decreases during externally-focused tasks. This finding has led to an emphasis in DMN research on internally-focused self-relevant thought processes. A recent study, in contrast, implicates the DMN in substantial externally-focused task switch-es. Using functional magnetic resonance imaging, we scanned 24 participants per-forming a task switch experiment. Whilst replicating previous DMN task switch ef-fects, we also found large DMN increases for brief rests as well as task restarts after rest. Our findings are difficult to explain using theories strictly linked to internal or self-directed cognition. In line with principal results from the literature, we suggest that the DMN encodes scene, episode or context, by integrating spatial, self-referential and temporal information. Context representations are strong at rest, but re-reference to context also occurs at major cognitive transitions.
Keywords
cognitive control, fMRI, task switching
Sponsorship
MRC (1650197)
MRC (unknown)
Medical Research Council (MC_UU_00005/6)
Identifiers
External DOI: https://doi.org/10.1093/cercor/bhy167
This record's URL: https://www.repository.cam.ac.uk/handle/1810/287139
Rights
Attribution 4.0 International, Attribution 4.0 International
Licence URL: http://creativecommons.org/licenses/by/4.0/
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