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@ARTICLE{Paul:1010193,
author = {Paul, Theresa and Wiemer, Valerie M. and Hensel and
Cieslak, Matthew and Tscherpel, Caroline and Grefkes,
Christian and Grafton, Scott T. and Fink, Gereon Rudolf and
Volz, Lukas J.},
title = {{I}nterhemispheric {S}tructural {C}onnectivity {U}nderlies
{M}otor {R}ecovery after {S}troke},
journal = {Annals of neurology},
volume = {94},
number = {4},
issn = {0364-5134},
address = {Hoboken, NJ},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2023-03004},
pages = {785-797},
year = {2023},
abstract = {Objective: Although ample evidence highlights that the
ipsilesional corticospinal tract (CST) plays a crucial role
in motor recovery after stroke, studies on cortico-cortical
motor connections remain scarce and provide inconclusive
results. Given their unique potential to serve as structural
reserve enabling motor network reorganization, the question
arises whether cortico-cortical connections may facilitate
motor control depending on CST damage.Methods: Diffusion
spectrum imaging (DSI) and a novel compartment-wise analysis
approach were used to quantify structural connectivity
between bilateral cortical core motor regions in chronic
stroke patients. Basal and complex motor control were
differentially assessed.Results: Both basal and complex
motor performance were correlated with structural
connectivity between bilateral premotor areas and
ipsilesional primary motor cortex (M1) as well as
interhemispheric M1 to M1 connectivity. Whereas complex
motor skills depended on CST integrity, a strong association
between M1 to M1 connectivity and basal motor control was
observed independent of CST integrity especially in patients
who underwent substantial motor recovery. Harnessing the
informational wealth of cortico-cortical connectivity
facilitated the explanation of both basal and complex motor
control.Interpretation: We demonstrate for the first time
that distinct aspects of cortical structural reserve enable
basal and complex motor control after stroke. In particular,
recovery of basal motor control may be supported via an
alternative route through contralesional M1 and non-crossing
fibers of the contralesional CST. Our findings help to
explain previous conflicting interpretations regarding the
functional role of the contralesional M1 and highlight the
potential of cortico-cortical structural connectivity as a
future biomarker for motor recovery post-stroke. ANN NEUROL
2023.},
cin = {INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {5251 - Multilevel Brain Organization and Variability
(POF4-525) / DFG project 431549029 - SFB 1451:
Schlüsselmechanismen normaler und krankheitsbedingt
gestörter motorischer Kontrolle (431549029) / DFG project
491111487 - Open-Access-Publikationskosten / 2022 - 2024 /
Forschungszentrum Jülich (OAPKFZJ) (491111487)},
pid = {G:(DE-HGF)POF4-5251 / G:(GEPRIS)431549029 /
G:(GEPRIS)491111487},
typ = {PUB:(DE-HGF)16},
pubmed = {37402647},
UT = {WOS:001036127300001},
doi = {10.1002/ana.26737},
url = {https://juser.fz-juelich.de/record/1010193},
}