Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception
How prior knowledge shapes perceptual processing across the human brain, particularly in the frontoparietal (FPN) and default-mode (DMN) networks, remains unknown. Using ultra-high-field (7T) functional magnetic resonance imaging (fMRI), we elucidated the effects that the acquisition of prior knowle...
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doaj-76961e3aa5f944c5bcb8ebceb602ae692021-05-05T16:03:19ZengeLife Sciences Publications LtdeLife2050-084X2018-07-01710.7554/eLife.36068Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perceptionCarlos González-García0https://orcid.org/0000-0001-6627-5777Matthew W Flounders1Raymond Chang2Alexis T Baria3Biyu J He4https://orcid.org/0000-0003-1549-1351National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, United States; Department of Experimental Psychology, Ghent University, Ghent, BelgiumNational Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, United States; Neuroscience Institute, New York University Langone Medical Center, New York, United StatesNational Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, United StatesNational Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, United StatesNational Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, United States; Neuroscience Institute, New York University Langone Medical Center, New York, United States; Departments of Neurology, New York University Langone Medical Center, New York, United States; Departments of Neuroscience and Physiology, New York University Langone Medical Center, New York, United States; Departments of Radiology, New York University Langone Medical Center, New York, United StatesHow prior knowledge shapes perceptual processing across the human brain, particularly in the frontoparietal (FPN) and default-mode (DMN) networks, remains unknown. Using ultra-high-field (7T) functional magnetic resonance imaging (fMRI), we elucidated the effects that the acquisition of prior knowledge has on perceptual processing across the brain. We observed that prior knowledge significantly impacted neural representations in the FPN and DMN, rendering responses to individual visual images more distinct from each other, and more similar to the image-specific prior. In addition, neural representations were structured in a hierarchy that remained stable across perceptual conditions, with early visual areas and DMN anchored at the two extremes. Two large-scale cortical gradients occur along this hierarchy: first, dimensionality of the neural representational space increased along the hierarchy; second, prior’s impact on neural representations was greater in higher-order areas. These results reveal extensive and graded influences of prior knowledge on perceptual processing across the brain.https://elifesciences.org/articles/36068visual perceptionprior experiencedefault-mode networkfrontoparietal network7T fMRI |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Carlos González-García Matthew W Flounders Raymond Chang Alexis T Baria Biyu J He |
spellingShingle |
Carlos González-García Matthew W Flounders Raymond Chang Alexis T Baria Biyu J He Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception eLife visual perception prior experience default-mode network frontoparietal network 7T fMRI |
author_facet |
Carlos González-García Matthew W Flounders Raymond Chang Alexis T Baria Biyu J He |
author_sort |
Carlos González-García |
title |
Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception |
title_short |
Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception |
title_full |
Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception |
title_fullStr |
Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception |
title_full_unstemmed |
Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception |
title_sort |
content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception |
publisher |
eLife Sciences Publications Ltd |
series |
eLife |
issn |
2050-084X |
publishDate |
2018-07-01 |
description |
How prior knowledge shapes perceptual processing across the human brain, particularly in the frontoparietal (FPN) and default-mode (DMN) networks, remains unknown. Using ultra-high-field (7T) functional magnetic resonance imaging (fMRI), we elucidated the effects that the acquisition of prior knowledge has on perceptual processing across the brain. We observed that prior knowledge significantly impacted neural representations in the FPN and DMN, rendering responses to individual visual images more distinct from each other, and more similar to the image-specific prior. In addition, neural representations were structured in a hierarchy that remained stable across perceptual conditions, with early visual areas and DMN anchored at the two extremes. Two large-scale cortical gradients occur along this hierarchy: first, dimensionality of the neural representational space increased along the hierarchy; second, prior’s impact on neural representations was greater in higher-order areas. These results reveal extensive and graded influences of prior knowledge on perceptual processing across the brain. |
topic |
visual perception prior experience default-mode network frontoparietal network 7T fMRI |
url |
https://elifesciences.org/articles/36068 |
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