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@ARTICLE{Chen:904379,
author = {Chen, Siyi and Weidner, Ralph and Zeng, Hang and Fink,
Gereon R. and Müller, Hermann J. and Conci, Markus},
title = {{F}eedback from lateral occipital cortex to {V}1 / {V}2
triggers object completion: {E}vidence from functional
magnetic resonance imaging and dynamic causal modeling},
journal = {Human brain mapping},
volume = {42},
number = {17},
issn = {1065-9471},
address = {New York, NY},
publisher = {Wiley-Liss},
reportid = {FZJ-2021-05949},
pages = {5581 - 5594},
year = {2021},
abstract = {Illusory figures demonstrate the visual system's ability to
integrate disparate parts into coherent wholes. We probed
this object integration process by either presenting an
integrated diamond shape or a comparable ungrouped
configuration that did not render a complete object. Two
tasks were used that either required localization of a
target dot (relative to the presented configuration) or
discrimination of the dot's luminance. The results showed
that only when the configuration was task relevant (in the
localization task), performance benefited from the
presentation of an integrated object. Concurrent functional
magnetic resonance imaging was performed and analyzed using
dynamic causal modeling to investigate the (causal)
relationship between regions that are associated with
illusory figure completion. We found object-specific
feedback connections between the lateral occipital cortex
(LOC) and early visual cortex (V1/V2). These modulatory
connections persisted across task demands and hemispheres.
Our results thus provide direct evidence that interactions
between mid-level and early visual processing regions engage
in illusory figure perception. These data suggest that LOC
first integrates inputs from multiple neurons in lower-level
cortices, generating a global shape representation while
more fine-graded object details are then determined via
feedback to early visual areas, independently of the current
task demands.},
cin = {INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {5251 - Multilevel Brain Organization and Variability
(POF4-525)},
pid = {G:(DE-HGF)POF4-5251},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34418200},
UT = {WOS:000686925900001},
doi = {10.1002/hbm.25637},
url = {https://juser.fz-juelich.de/record/904379},
}