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@ARTICLE{Paul:902525,
author = {Paul, Theresa and Hensel, Lukas and Rehme, Anne K. and
Tscherpel, Caroline and Eickhoff, Simon B. and Fink, Gereon
R. and Grefkes, Christian and Volz, Lukas J.},
title = {{E}arly motor network connectivity after stroke: {A}n
interplay of general reorganization and state‐specific
compensation},
journal = {Human brain mapping},
volume = {42},
number = {16},
issn = {1065-9471},
address = {New York, NY},
publisher = {Wiley-Liss},
reportid = {FZJ-2021-04334},
pages = {5230 - 5243},
year = {2021},
abstract = {Motor recovery after stroke relies on functional
reorganization of the motor network, which is commonly
assessed via functional magnetic resonance imaging
(fMRI)-based resting-state functional connectivity (rsFC) or
task-related effective connectivity (trEC). Measures of
either connectivity mode have been shown to successfully
explain motor impairment post-stroke, posing the question
whether motor impairment is more closely reflected by rsFC
or trEC. Moreover, highly similar changes in ipsilesional
and interhemispheric motor network connectivity have been
reported for both rsFC and trEC after stroke, suggesting
that altered rsFC and trEC may capture similar aspects of
information integration in the motor network reflecting
principle, state-independent mechanisms of network
reorganization rather than state-specific compensation
strategies. To address this question, we conducted the first
direct comparison of rsFC and trEC in a sample of early
subacute stroke patients (n = 26, included on average
7.3 days post-stroke). We found that both rsFC and trEC
explained motor impairment across patients, stressing the
clinical potential of fMRI-based connectivity. Importantly,
intrahemispheric connectivity between ipsilesional M1 and
premotor areas depended on the activation state, whereas
interhemispheric connectivity between homologs was
state-independent. From a mechanistic perspective, our
results may thus arise from two distinct aspects of motor
network plasticity: task-specific compensation within the
ipsilesional hemisphere and a more fundamental form of
reorganization between hemispheres.},
cin = {INM-3 / INM-7},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406 / I:(DE-Juel1)INM-7-20090406},
pnm = {5252 - Brain Dysfunction and Plasticity (POF4-525)},
pid = {G:(DE-HGF)POF4-5252},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34346531},
UT = {WOS:000680934200001},
doi = {10.1002/hbm.25612},
url = {https://juser.fz-juelich.de/record/902525},
}