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Intersubject consistent dynamic connectivity during natural vision revealed by functional MRI

Authors: Di, Xin; Biswal, Bharat B;

Intersubject consistent dynamic connectivity during natural vision revealed by functional MRI

Abstract

Abstract The functional communications between brain regions are thought to be dynamic. However, it is usually difficult to elucidate whether the observed dynamic connectivity is functionally meaningful or simply due to noise during unconstrained task conditions such as resting-state. During naturalistic conditions, such as watching a movie, it has been shown that local brain activities, e.g. in the visual cortex, are consistent across subjects. Following similar logic, we propose to study intersubject correlations of the time courses of dynamic connectivity during naturalistic conditions to extract functionally meaningful dynamic connectivity patterns. We analyzed a functional MRI (fMRI) dataset when the subjects watched a short animated movie. We calculated dynamic connectivity by using sliding window technique, and quantified the intersubject correlations of the time courses of dynamic connectivity. Although the time courses of dynamic connectivity are thought to be noisier than the original signals, we found similar level of intersubject correlations of dynamic connectivity to those of regional activity. Most importantly, highly consistent dynamic connectivity could occur between regions that did not show high intersubject correlations of regional activity, and between regions with little stable functional connectivity. The analysis highlighted higher order brain regions such as the default mode network that dynamically interacted with posterior visual regions during the movie watching, which may be associated with the understanding of the movie. Highlights Intersubject consistency may provide a complementary approach to study brain dynamic connectivity Widespread brain regions showed highly consistent dynamic connectivity during movie watching, while these regions themselves did not show highly consistent regional activity Consistent dynamic connectivity often occurred between regions from different functional systems

Keywords

Naturalistic condition, Adult, Cerebral Cortex, Male, Adolescent, Motion Pictures, Default Mode Network, Neurosciences. Biological psychiatry. Neuropsychiatry, Supramarginal gyrus, Magnetic Resonance Imaging, Intersubject correlation, Dynamic connectivity, Young Adult, Movie connectome, Default mode network, Connectome, Visual Perception, Humans, Female, Nerve Net, RC321-571

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    influence
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
36
Top 10%
Top 10%
Top 10%
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