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@ARTICLE{Michely:844288,
author = {Michely, J. and Volz, L. J. and Hoffstaedter, F. and
Tittgemeyer, M. and Eickhoff, Simon and Fink, G. R. and
Grefkes, C.},
title = {{N}etwork connectivity of motor control in the ageing
brain},
journal = {NeuroImage: Clinical},
volume = {18},
issn = {2213-1582},
address = {[Amsterdam u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-01728},
pages = {443 - 455},
year = {2018},
abstract = {Older individuals typically display stronger regional brain
activity than younger subjects during motor performance.
However, knowledge regarding age-related changes of motor
network interactions between brain regions remains scarce.
We here investigated the impact of ageing on the interaction
of cortical areas during movement selection and initiation
using dynamic causal modelling (DCM). We found that
age-related psychomotor slowing was accompanied by increases
in both regional activity and effective connectivity,
especially for ‘core’ motor coupling targeting primary
motor cortex (M1). Interestingly, younger participants
within the older group showed strongest connectivity
targeting M1, which steadily decreased with advancing age.
Conversely, prefrontal influences on the motor system
increased with advancing age, and were inversely correlated
with reduced parietal influences and core motor coupling.
Interestingly, higher net coupling within the
prefrontal-premotor-M1 axis predicted faster psychomotor
speed in ageing. Hence, as opposed to a uniform age-related
decline, our findings are compatible with the idea of
different age-related compensatory mechanisms, with an
important role of the prefrontal cortex compensating for
reduced coupling within the core motor network.},
cin = {INM-3 / INM-1 / INM-7},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406 / I:(DE-Juel1)INM-1-20090406 /
I:(DE-Juel1)INM-7-20090406},
pnm = {572 - (Dys-)function and Plasticity (POF3-572)},
pid = {G:(DE-HGF)POF3-572},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29552486},
UT = {WOS:000433169000045},
doi = {10.1016/j.nicl.2018.02.001},
url = {https://juser.fz-juelich.de/record/844288},
}