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@ARTICLE{Zeng:874941,
author = {Zeng, Hang and Fink, G. R. and Weidner, R.},
title = {{V}isual size processing in early visual areas follows
lateral occipital cortex involvement},
journal = {The journal of neuroscience},
volume = {40},
number = {22},
issn = {0270-6474},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2020-01713},
pages = {4410-4417},
year = {2020},
abstract = {Neural activation in the early visual cortex (EVC) reflects
the perceived rather than retinal size of stimuli,
suggesting that feedback possibly from extrastriate regions
modulates retinal size information in EVC. Meanwhile, the
lateral occipital cortex (LOC) has been suggested to be
critically involved in object size processing. To test for
the potential contributions of feedback modulations on size
representations in EVC, we investigated the dynamics of
relevant processes using transcranial magnetic stimulation
(TMS). Specifically, we briefly disrupted the neural
activity of EVC and LOC at early, intermediate, and late
time windows while participants performed size judgement
tasks in either an illusory or neutral context. TMS over EVC
and LOC allowed determining whether these two brain regions
are relevant for generating phenomenological size
impressions. Furthermore, the temporal order of TMS effects
allowed inferences on the dynamics of information exchange
between the two areas. Particularly, if feedback signals
from LOC to EVC are crucial for generating altered size
representations in EVC, then TMS effects over EVC should be
observed simultaneously or later than the effects following
LOC stimulation. The data from 20 humans (13 females)
revealed that TMS over both EVC and LOC impaired illusory
size perception. However, the strongest effects of TMS
applied over EVC occurred later than those of LOC,
supporting a functionally relevant feedback modulation from
LOC to EVC for scaling size information. Our results suggest
that context integration and the concomitant change of
perceived size require LOC and result in modulating
representations in EVC via recurrent processing.},
cin = {INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {572 - (Dys-)function and Plasticity (POF3-572)},
pid = {G:(DE-HGF)POF3-572},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32350038},
UT = {WOS:000535695400012},
doi = {10.1523/JNEUROSCI.2437-19.2020},
url = {https://juser.fz-juelich.de/record/874941},
}