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- W4286253091 endingPage "119497" @default.
- W4286253091 startingPage "119497" @default.
- W4286253091 abstract "Scene construction is a key component of memory recall, navigation, and future imagining, and relies on the medial temporal lobes (MTL). A parallel body of work suggests that eye movements may enable the imagination and construction of scenes, even in the absence of external visual input. There are vast structural and functional connections between regions of the MTL and those of the oculomotor system. However, the directionality of connections between the MTL and oculomotor control regions, and how it relates to scene construction, has not been studied directly in human neuroimaging. In the current study, we used dynamic causal modeling (DCM) to interrogate effective connectivity between the MTL and oculomotor regions using a scene construction task in which participants’ eye movements were either restricted (fixed-viewing) or unrestricted (free-viewing). By omitting external visual input, and by contrasting free- versus fixed- viewing, the directionality of neural connectivity during scene construction could be determined. As opposed to when eye movements were restricted, allowing free-viewing during construction of scenes strengthened top-down connections from the MTL to the frontal eye fields, and to lower-level cortical visual processing regions, suppressed bottom-up connections along the visual stream, and enhanced vividness of the constructed scenes. Taken together, these findings provide novel, non-invasive evidence for the underlying, directional, connectivity between the MTL memory system and oculomotor system associated with constructing vivid mental representations of scenes." @default.
- W4286253091 created "2022-07-21" @default.
- W4286253091 creator A5035636910 @default.
- W4286253091 creator A5058519790 @default.
- W4286253091 creator A5074697286 @default.
- W4286253091 date "2022-10-01" @default.
- W4286253091 modified "2023-10-14" @default.
- W4286253091 title "Unrestricted eye movements strengthen effective connectivity from hippocampal to oculomotor regions during scene construction" @default.
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