Neural dynamics of visual ambiguity resolution by perceptual prior

被引：30

作者：

Flounders, Matthew W. ^{[1
]}

Gonzalez-Garcia, Carlos ^{[2
]}

Hardstone, Richard ^{[1
]}

He, Biyu J. ^{[1
,3
,4
,5
]}

机构：

[1] NYU, Langone Med Ctr, Neurosci Inst, New York, NY 10016 USA

[2] Univ Ghent, Dept Expt Psychol, Ghent, Belgium

[3] NYU, Langone Med Ctr, Dept Neurol, New York, NY 10016 USA

[4] NYU, Langone Med Ctr, Dept Neurosci & Physiol, New York, NY 10016 USA

[5] NYU, Langone Med Ctr, Dept Radiol, New York, NY 10016 USA

来源：

ELIFE | 2019年 / 8卷

基金：

美国国家科学基金会;

关键词：

OBJECT RECOGNITION; BRAIN MECHANISMS; BAND ACTIVITY; REPRESENTATIONS; ACTIVATION; FMRI; MEG; DISAMBIGUATION; ORGANIZATION; SIMILARITY;

D O I：

10.7554/eLife.41861

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：25

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