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Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception

(2018) ELIFE. 7.
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Abstract
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.

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Please use this url to cite or link to this publication:

Chicago
Gonzalez-Garcia, Carlos, Matthew W. Flounders, Raymond Chang, Alexis T. Baria, and Biyu J. He. 2018. “Content-specific Activity in Frontoparietal and Default-mode Networks During Prior-guided Visual Perception.” Elife 7.
APA
Gonzalez-Garcia, C., Flounders, M. W., Chang, R., Baria, A. T., & He, B. J. (2018). Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception. ELIFE, 7.
Vancouver
1.
Gonzalez-Garcia C, Flounders MW, Chang R, Baria AT, He BJ. Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception. ELIFE. eLife Sciences Publications, Ltd; 2018;7.
MLA
Gonzalez-Garcia, Carlos et al. “Content-specific Activity in Frontoparietal and Default-mode Networks During Prior-guided Visual Perception.” ELIFE 7 (2018): n. pag. Print.
@article{8607927,
  abstract     = {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{\textquoteright}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.},
  articleno    = {e36068},
  author       = {Gonzalez-Garcia, Carlos and Flounders, Matthew W. and Chang, Raymond and Baria, Alexis T. and He, Biyu J.},
  issn         = {2050-084X},
  journal      = {ELIFE},
  language     = {eng},
  publisher    = {eLife Sciences Publications, Ltd},
  title        = {Content-specific activity in frontoparietal and default-mode networks during prior-guided visual perception},
  url          = {http://dx.doi.org/10.7554/elife.36068},
  volume       = {7},
  year         = {2018},
}

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