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@ARTICLE{WeissBlankenhorn:139441,
author = {Weiss-Blankenhorn, Peter and Achilles, Elisabeth and Moos,
Katharina and Hesse, Maike and Sparing, Roland and Fink,
Gereon Rudolf},
title = {{T}ranscranial direct current stimulation (t{DCS}) of left
parietal cortex facilitates gesture processing in healthy
subjects.},
journal = {The journal of neuroscience},
volume = {33},
number = {49},
issn = {0270-6474},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2013-05430},
pages = {19205 - 19211},
year = {2013},
abstract = {Gesture processing deficits constitute a key symptom of
apraxia, a disorder of motor cognition frequently observed
after left-hemispheric stroke. The clinical relevance of
apraxia stands in stark contrast to the paucity of
therapeutic options available. Transcranial direct current
stimulation (tDCS) is a promising tool for modulating
disturbed network function after stroke. Here, we
investigate the effect of parietal tDCS on gesture
processing in healthy human subjects. Neuropsychological and
imaging studies suggest that the imitation and matching of
hand gestures involve the left inferior parietal lobe (IPL).
Using neuronavigation based on cytoarchitectonically defined
anatomical probability maps, tDCS was applied over left
IPL-areas PF, PFm, or PG in healthy participants (n = 26).
Before and after tDCS, subjects performed a gesture matching
task and a person discrimination task for control. Changes
in error rates and reaction times were analyzed for the
effects of anodal and cathodal tDCS (compared with sham
tDCS). Matching of hand gestures was specifically
facilitated by anodal tDCS applied over the
cytoarchitectonically defined IPL-area PFm, whereas tDCS
over IPL-areas PF and PG did not elucidate significant
effects. Taking into account tDCS electrode size and the
central position of area PFm within IPL, it can be assumed
that the observed effect is rather the result of a combined
stimulation of the supramarginal and angular gyrus than an
isolated PFm stimulation. Our data confirm the pivotal role
of the left IPL in gesture processing. Furthermore,
anatomically guided tDCS of the left IPL may constitute a
promising approach to neurorehabilitation of apraxic
patients with gesture processing deficits},
cin = {INM-3},
ddc = {590},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {333 - Pathophysiological Mechanisms of Neurological and
Psychiatric Diseases (POF2-333)},
pid = {G:(DE-HGF)POF2-333},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000328110100016},
pubmed = {pmid:24305816},
doi = {10.1523/JNEUROSCI.4714-12.2013},
url = {https://juser.fz-juelich.de/record/139441},
}