Neural dynamics of visual ambiguity resolution by perceptual prior.
7T fMRI
MEG
human
neuroscience
past experience
prior knowledge
representational similarity analysis
visual perception
Journal
eLife
ISSN: 2050-084X
Titre abrégé: Elife
Pays: England
ID NLM: 101579614
Informations de publication
Date de publication:
07 03 2019
07 03 2019
Historique:
received:
09
09
2018
accepted:
25
02
2019
pubmed:
8
3
2019
medline:
31
3
2020
entrez:
8
3
2019
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 30843519
doi: 10.7554/eLife.41861
pii: 41861
pmc: PMC6415935
doi:
pii:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : U.S. Department of State
ID : The Fulbright Program
Pays : International
Organisme : National Science Foundation
ID : BCS-1753218
Pays : International
Informations de copyright
© 2019, Flounders et al.
Déclaration de conflit d'intérêts
MF, CG, RH, BH No competing interests declared
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