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@ARTICLE{Genon:834145,
author = {Genon, Sarah and Wensing, Tobias and Reid, Andrew and
Hoffstaedter, Felix and Caspers, Svenja and Grefkes,
Christian and Nickl-Jockschat, Thomas and Eickhoff, Simon},
title = {{S}earching for behavior relating to grey matter volume in
a-priori defined right dorsal premotor regions: {L}essons
learned},
journal = {NeuroImage},
volume = {157},
issn = {1053-8119},
address = {Orlando, Fla.},
publisher = {Academic Press},
reportid = {FZJ-2017-04143},
pages = {144 - 156},
year = {2017},
abstract = {Recently, we showed that the functional heterogeneity of
the right dorsal premotor (PMd) cortex could be better
understood by dividing it into five subregions that showed
different behavioral associations according to task-based
activations studies. The present study investigated whether
the revealed behavioral profile could be corroborated and
complemented by a structural brain behavior correlation
approach in two healthy adults cohorts.Grey matter volume
within the five volumes of interest (VOI-GM) was computed
using voxel-based morphometry. Associations between the
inter-individual differences in VOI-GM and performance
across a range of neuropsychological tests were assessed in
the two cohorts with and without correction for
demographical variables. Additional analyses were performed
in random smaller subsamples drawn from each of the two
cohorts.In both cohorts, correlation coefficients were low;
only few were significant and a considerable number of
correlations were counterintuitive in their directions
(i.e., higher performance related to lower grey matter
volume). Furthermore, correlation patterns were inconsistent
between the two cohorts. Subsampling revealed that
correlation patterns could vary widely across small samples
and that negative correlations were as likely as positive
correlations.Thus, the structural brain-behavior approach
did not corroborate the functional profiles of the PMd
subregions inferred from activation studies, suggesting that
local recruitment by fMRI studies does not necessarily imply
covariance of local structure with behavioral performance in
healthy adults. We discuss the limitations of such studies
and related recommendations for future studies.},
cin = {INM-3 / INM-7 / INM-1},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406 / I:(DE-Juel1)INM-7-20090406 /
I:(DE-Juel1)INM-1-20090406},
pnm = {572 - (Dys-)function and Plasticity (POF3-572)},
pid = {G:(DE-HGF)POF3-572},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000410539800013},
pubmed = {pmid:28552730},
doi = {10.1016/j.neuroimage.2017.05.053},
url = {https://juser.fz-juelich.de/record/834145},
}