Role of the default mode network in cognitive transitions
<p style="text-align:justify;"> A frequently repeated finding is that the default mode network (DMN) shows activation 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,...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Oxford University Press
2018
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| _version_ | 1797070813378117632 |
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| author | Smith, V Mitchell, DJ Duncan, J |
| author_facet | Smith, V Mitchell, DJ Duncan, J |
| author_sort | Smith, V |
| collection | OXFORD |
| description | <p style="text-align:justify;"> A frequently repeated finding is that the default mode network (DMN) shows activation 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 switches. Using functional magnetic resonance imaging, we scanned 24 participants performing a task switch experiment. Whilst replicating previous DMN task switch effects, 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 rereference to context also occurs at major cognitive transitions. </p> |
| first_indexed | 2024-03-06T22:44:21Z |
| format | Journal article |
| id | oxford-uuid:5ca59dc3-3af2-4e0b-acc5-34cbd5a99b61 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:44:21Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:5ca59dc3-3af2-4e0b-acc5-34cbd5a99b612022-03-26T17:29:31ZRole of the default mode network in cognitive transitionsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5ca59dc3-3af2-4e0b-acc5-34cbd5a99b61EnglishSymplectic Elements at OxfordOxford University Press2018Smith, VMitchell, DJDuncan, J <p style="text-align:justify;"> A frequently repeated finding is that the default mode network (DMN) shows activation 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 switches. Using functional magnetic resonance imaging, we scanned 24 participants performing a task switch experiment. Whilst replicating previous DMN task switch effects, 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 rereference to context also occurs at major cognitive transitions. </p> |
| spellingShingle | Smith, V Mitchell, DJ Duncan, J Role of the default mode network in cognitive transitions |
| title | Role of the default mode network in cognitive transitions |
| title_full | Role of the default mode network in cognitive transitions |
| title_fullStr | Role of the default mode network in cognitive transitions |
| title_full_unstemmed | Role of the default mode network in cognitive transitions |
| title_short | Role of the default mode network in cognitive transitions |
| title_sort | role of the default mode network in cognitive transitions |
| work_keys_str_mv | AT smithv roleofthedefaultmodenetworkincognitivetransitions AT mitchelldj roleofthedefaultmodenetworkincognitivetransitions AT duncanj roleofthedefaultmodenetworkincognitivetransitions |