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• W1844952203 startingPage "e0151194" @default.
• W1844952203 abstract "Filling-in at the blind spot is a perceptual phenomenon in which the visual system fills the informational void, which arises due to the absence of retinal input corresponding to the optic disc, with surrounding visual attributes. It is known that during filling-in, nonlinear neural responses are observed in the early visual area that correlates with the perception, but the knowledge of underlying neural mechanism for filling-in at the blind spot is far from complete. In this work, we attempted to present a fresh perspective on the computational mechanism of filling-in process in the framework of hierarchical predictive coding, which provides a functional explanation for a range of neural responses in the cortex. We simulated a three-level hierarchical network and observe its response while stimulating the network with different bar stimulus across the blind spot. We find that the predictive-estimator neurons that represent blind spot in primary visual cortex exhibit elevated non-linear response when the bar stimulated both sides of the blind spot. Using generative model, we also show that these responses represent the filling-in completion. All these results are consistent with the finding of psychophysical and physiological studies. In this study, we also demonstrate that the tolerance in filling-in qualitatively matches with the experimental findings related to non-aligned bars. We discuss this phenomenon in the predictive coding paradigm and show that all our results could be explained by taking into account the efficient coding of natural images along with feedback and feed-forward connections that allow priors and predictions to co-evolve to arrive at the best prediction. These results suggest that the filling-in process could be a manifestation of the general computational principle of hierarchical predictive coding of natural images." @default.
• W1844952203 created "2016-06-24" @default.
• W1844952203 creator A5031699649 @default.
• W1844952203 creator A5045767984 @default.
• W1844952203 date "2016-03-09" @default.
• W1844952203 modified "2023-10-18" @default.
• W1844952203 title "Predictive Coding: A Possible Explanation of Filling-In at the Blind Spot" @default.
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• W1844952203 doi "https://doi.org/10.1371/journal.pone.0151194" @default.
• W1844952203 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4784844" @default.
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• W1844952203 hasPublicationYear "2016" @default.
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