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@ARTICLE{Maas:282907,
author = {Maas, Roderick P P W M and Faber, Jennifer and van de
Warrenburg, Bart P C and Schutter, Dennis J L G},
collaboration = {Group, ESMI MR Study},
title = {{C}erebellar transcranial direct current stimulation in
spinocerebellar ataxia type 3: {A}n electric field modelling
study.},
journal = {Clinical neurophysiology},
volume = {181},
issn = {1388-2457},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {DZNE-2025-01368},
pages = {2111405},
year = {2026},
abstract = {To compare cerebellar transcranial direct current
stimulation (tDCS)-induced electric field strengths between
individuals with spinocerebellar ataxia type 3 (SCA3) and
healthy controls and to identify factors that underlie the
variability in field strength.MRI scans from 68 SCA3
mutation carriers spanning the disease spectrum and 37
healthy adults were used to reconstruct tetrahedral volume
meshes of the head. Electric field simulations of midline
cerebellar tDCS were performed with the buccinator muscle,
frontopolar region, and lower neck as reference electrode
positions. Eight regions of interest were defined throughout
the cerebellum.Simulated electric field strengths induced by
cerebellar tDCS were generally lower in SCA3 mutation
carriers than in healthy controls, particularly in the
anterior lobe and with cephalic reference electrodes. The
frontopolar montage induced the highest field strengths,
while the lower neck montage caused the lowest field
strengths. Skin-cerebellum distance, Scale for the
Assessment and Rating of Ataxia (SARA) score, and 'occipital
angle' were independently associated with electric field
strength.Skin-cerebellum distance, posterior fossa
morphometry, ataxia severity, and electrode montage predict
cerebellar tDCS-induced electric field strength in SCA3
mutation carriers. These results may guide the development
of personalized neuromodulation protocols and inform the
design of future cerebellar tDCS trials in degenerative
ataxias.This study identified clinical and anatomical
factors that affect cerebellar tDCS-induced field strength
in individuals with the most common type of dominantly
inherited ataxia worldwide.},
keywords = {Humans / Transcranial Direct Current Stimulation: methods /
Male / Machado-Joseph Disease: physiopathology /
Machado-Joseph Disease: therapy / Machado-Joseph Disease:
diagnostic imaging / Machado-Joseph Disease: genetics /
Female / Adult / Middle Aged / Cerebellum: physiopathology /
Cerebellum: diagnostic imaging / Magnetic Resonance Imaging
/ Aged / Ataxia (Other) / Cerebellar tDCS (Other) / Electric
fields (Other) / Interindividual variability (Other) /
Modelling study (Other) / Simulation (Other)},
cin = {Clinical Research (Bonn)},
ddc = {610},
cid = {I:(DE-2719)1011001},
pnm = {353 - Clinical and Health Care Research (POF4-353)},
pid = {G:(DE-HGF)POF4-353},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:41218516},
doi = {10.1016/j.clinph.2025.2111405},
url = {https://pub.dzne.de/record/282907},
}