Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery
Abstract Research suggests that perception and imagination engage neuronal representations in the same visual areas. However, the underlying mechanisms that differentiate sensory perception from imagination remain unclear. Here, we examine the directed coupling (effective connectivity) between front...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-05888-8 |
| _version_ | 1818344321414332416 |
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| author | N. Dijkstra P. Zeidman S. Ondobaka M. A. J. van Gerven K. Friston |
| author_facet | N. Dijkstra P. Zeidman S. Ondobaka M. A. J. van Gerven K. Friston |
| author_sort | N. Dijkstra |
| collection | DOAJ |
| description | Abstract Research suggests that perception and imagination engage neuronal representations in the same visual areas. However, the underlying mechanisms that differentiate sensory perception from imagination remain unclear. Here, we examine the directed coupling (effective connectivity) between fronto-parietal and visual areas during perception and imagery. We found an increase in bottom-up coupling during perception relative to baseline and an increase in top-down coupling during both perception and imagery, with a much stronger increase during imagery. Modulation of the coupling from frontal to early visual areas was common to both perception and imagery. Furthermore, we show that the experienced vividness during imagery was selectively associated with increases in top-down connectivity to early visual cortex. These results highlight the importance of top-down processing in internally as well as externally driven visual experience. |
| first_indexed | 2024-12-13T16:44:37Z |
| format | Article |
| id | doaj.art-7b1b6c2d3d3f4e838ecb2861d51fccf9 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-13T16:44:37Z |
| publishDate | 2017-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-7b1b6c2d3d3f4e838ecb2861d51fccf92022-12-21T23:38:13ZengNature PortfolioScientific Reports2045-23222017-07-01711910.1038/s41598-017-05888-8Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and ImageryN. Dijkstra0P. Zeidman1S. Ondobaka2M. A. J. van Gerven3K. Friston4Radboud University, Donders Institute for Brain, Cognition and BehaviourThe Wellcome Trust Centre for Neuroimaging, UCLThe Wellcome Trust Centre for Neuroimaging, UCLRadboud University, Donders Institute for Brain, Cognition and BehaviourThe Wellcome Trust Centre for Neuroimaging, UCLAbstract Research suggests that perception and imagination engage neuronal representations in the same visual areas. However, the underlying mechanisms that differentiate sensory perception from imagination remain unclear. Here, we examine the directed coupling (effective connectivity) between fronto-parietal and visual areas during perception and imagery. We found an increase in bottom-up coupling during perception relative to baseline and an increase in top-down coupling during both perception and imagery, with a much stronger increase during imagery. Modulation of the coupling from frontal to early visual areas was common to both perception and imagery. Furthermore, we show that the experienced vividness during imagery was selectively associated with increases in top-down connectivity to early visual cortex. These results highlight the importance of top-down processing in internally as well as externally driven visual experience.https://doi.org/10.1038/s41598-017-05888-8 |
| spellingShingle | N. Dijkstra P. Zeidman S. Ondobaka M. A. J. van Gerven K. Friston Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery Scientific Reports |
| title | Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery |
| title_full | Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery |
| title_fullStr | Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery |
| title_full_unstemmed | Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery |
| title_short | Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery |
| title_sort | distinct top down and bottom up brain connectivity during visual perception and imagery |
| url | https://doi.org/10.1038/s41598-017-05888-8 |
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