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...

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Autores principales:	N. Dijkstra, P. Zeidman, S. Ondobaka, M. A. J. van Gerven, K. Friston
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7b1b6c2d3d3f4e838ecb2861d51fccf9
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id	oai:doaj.org-article:7b1b6c2d3d3f4e838ecb2861d51fccf9
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spelling	oai:doaj.org-article:7b1b6c2d3d3f4e838ecb2861d51fccf92021-12-02T15:05:18ZDistinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery10.1038/s41598-017-05888-82045-2322https://doaj.org/article/7b1b6c2d3d3f4e838ecb2861d51fccf92017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05888-8https://doaj.org/toc/2045-2322Abstract 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.N. DijkstraP. ZeidmanS. OndobakaM. A. J. van GervenK. FristonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q 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
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.
format	article
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
title	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_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_sort	distinct top-down and bottom-up brain connectivity during visual perception and imagery
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7b1b6c2d3d3f4e838ecb2861d51fccf9
work_keys_str_mv	AT ndijkstra distincttopdownandbottomupbrainconnectivityduringvisualperceptionandimagery AT pzeidman distincttopdownandbottomupbrainconnectivityduringvisualperceptionandimagery AT sondobaka distincttopdownandbottomupbrainconnectivityduringvisualperceptionandimagery AT majvangerven distincttopdownandbottomupbrainconnectivityduringvisualperceptionandimagery AT kfriston distincttopdownandbottomupbrainconnectivityduringvisualperceptionandimagery
_version_	1718388899205611520

Distinct Top-down and Bottom-up Brain Connectivity During Visual Perception and Imagery

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