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@ARTICLE{Pool:187309,
author = {Pool, Eva-Maria and Rehme, Anne K. and Eickhoff, Simon and
Fink, Gereon R. and Grefkes, Christian},
title = {{F}unctional resting-state connectivity of the human motor
network: {D}ifferences between right- and left-handers},
journal = {NeuroImage},
volume = {109},
issn = {1053-8119},
address = {Orlando, Fla.},
publisher = {Academic Press},
reportid = {FZJ-2015-00980},
pages = {298–306},
year = {2015},
abstract = {Handedness is associated with differences in activation
levels in various motor tasks performed with the dominant or
non-dominant hand. Here we tested whether handedness is
reflected in the functional architecture of the motor system
even in the absence of an overt motor task. Using
resting-state functional magnetic resonance imaging we
investigated 18 right- and 18 left-handers. Whole-brain
functional connectivity maps of the primary motor cortex
(M1), supplementary motor area (SMA), dorsolateral premotor
cortex (PMd), pre-SMA, inferior frontal junction and motor
putamen were compared between right- and left-handers. We
further used a multivariate linear support vector machine
(SVM) classifier to reveal the specificity of brain regions
for classifying handedness based on individual resting-state
maps. Using left M1 as seed region, functional connectivity
analysis revealed stronger interhemispheric functional
connectivity between left M1 and right PMd in right-handers
as compared to left-handers. This connectivity cluster
contributed to the individual classification of right- and
left-handers with $86.2\%$ accuracy. Consistently, also
seeding from right PMd yielded a similar
handedness-dependent effect in left M1, albeit with lower
classification accuracy $(78.1\%).$ Control analyses of the
other resting-state networks including the speech and the
visual network revealed no significant differences in
functional connectivity related to handedness. In
conclusion, our data revealed an intrinsically higher
functional connectivity in right-handers. These results may
help to explain that hand preference is more lateralized in
right-handers than in left-handers. Furthermore, enhanced
functional connectivity between left M1 and right PMd may
serve as an individual marker of handedness.},
cin = {INM-1 / INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-1-20090406 / I:(DE-Juel1)INM-3-20090406},
pnm = {571 - Connectivity and Activity (POF3-571) / HBP - The
Human Brain Project (604102)},
pid = {G:(DE-HGF)POF3-571 / G:(EU-Grant)604102},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000349971600027},
pubmed = {pmid:25613438},
doi = {10.1016/j.neuroimage.2015.01.034},
url = {https://juser.fz-juelich.de/record/187309},
}