Neural dynamics of visual ambiguity resolution by perceptual prior.
| Autor: | Flounders MW; Neuroscience Institute, New York University Langone Medical Center, New York, United States., González-García C; Department of Experimental Psychology, Ghent University, Ghent, Belgium., Hardstone R; Neuroscience Institute, New York University Langone Medical Center, New York, United States., He BJ; Neuroscience Institute, New York University Langone Medical Center, New York, United States.; Department of Neurology, New York University Langone Medical Center, New York, United States.; Department of Neuroscience and Physiology, New York University Langone Medical Center, New York, United States.; Department of Radiology, New York University Langone Medical Center, New York, United States. |
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| Jazyk: | angličtina |
| Zdroj: | ELife [Elife] 2019 Mar 07; Vol. 8. Date of Electronic Publication: 2019 Mar 07. |
| DOI: | 10.7554/eLife.41861 |
| Abstrakt: | Past experiences have enormous power in shaping our daily perception. Currently, dynamical neural mechanisms underlying this process remain mysterious. Exploiting a dramatic visual phenomenon, where a single experience of viewing a clear image allows instant recognition of a related degraded image, we investigated this question using MEG and 7 Tesla fMRI in humans. We observed that following the acquisition of perceptual priors, different degraded images are represented much more distinctly in neural dynamics starting from ~500 ms after stimulus onset. Content-specific neural activity related to stimulus-feature processing dominated within 300 ms after stimulus onset, while content-specific neural activity related to recognition processing dominated from 500 ms onward. Model-driven MEG-fMRI data fusion revealed the spatiotemporal evolution of neural activities involved in stimulus, attentional, and recognition processing. Together, these findings shed light on how experience shapes perceptual processing across space and time in the brain. Competing Interests: MF, CG, RH, BH No competing interests declared (© 2019, Flounders et al.) |
| Databáze: | MEDLINE |
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