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@ARTICLE{Abdelmotaleb:279883,
author = {Abdelmotaleb, Mohamed and Niemann, Filip and Kocataş,
Harun and Caisachana Guevara, Leonardo M and Shahbabaie,
Alireza and Malinowski, Robert and Riemann, Steffen and
Fromm, Anna Elisabeth and Hayek, Dayana and Antonenko, Daria
and Meinzer, Marcus and Flöel, Agnes},
title = {{I}dentification of {R}eliable {T}arget {B}rain {R}egions
for {E}nhancing {O}bject-{L}ocation {M}emory by {B}rain
{S}timulation.},
journal = {Brain and behavior},
volume = {15},
number = {7},
issn = {2162-3279},
address = {Malden, Mass.},
publisher = {Wiley},
reportid = {DZNE-2025-00850},
pages = {e70658},
year = {2025},
abstract = {Object-location memory (OLM) is essential for remembering
the locations of objects within an environment and is often
impaired in aging and neurodegenerative diseases.
Transcranial direct current stimulation (tDCS) has shown
promise for improving OLM, although study outcomes have
varied considerably. This study aimed to identify key brain
regions involved in OLM that may serve as stimulation
targets for future tDCS research and to assess the
test-retest reliability (TRR) of both behavioral and
functional magnetic resonance imaging (fMRI) data.Twenty
healthy young adults (10 females; mean age = 25.0 years,
standard deviation [SD] = 5.56) completed two task-based
fMRI sessions using parallel versions of an OLM task.
Participants learned associations between house images and
their locations on a two-dimensional street map across four
feedback-based learning stages. Sham tDCS was administered
in both sessions using a focal 3 × 1 electrode montage. TRR
was assessed using intraclass correlation coefficients
(ICCs) for behavioral performance and task-related fMRI
activation.Behavioral data showed significant improvements
in response accuracy (estimate = 0.211, p < 0.001) and a
reduction in response latency (estimate = -0.050, p < 0.001)
across learning stages. fMRI analysis revealed predominantly
right-lateralized activation, including the right
hippocampus, the fusiform gyrus, the precuneus, and the
lateral temporo-occipital areas. Behavioral measures showed
moderate to good TRR (accuracy ICC = 0.801; reaction time
ICC = 0.705). Task-related fMRI activity demonstrated
good-to-excellent TRR in key regions, including the fusiform
and temporo-occipital cortices.These findings support the
validity of our OLM paradigm for assessing brain stimulation
effects and highlight potential cortical targets for future
tDCS interventions. The observed reliability of behavioral
and neural measures further reinforces the utility of this
protocol in crossover study designs.},
keywords = {Humans / Female / Transcranial Direct Current Stimulation:
methods / Magnetic Resonance Imaging: methods / Male / Adult
/ Young Adult / Brain: physiology / Brain: diagnostic
imaging / Reproducibility of Results / Brain Mapping:
methods / Spatial Memory: physiology / functional magnetic
resonance imaging (fMRI) (Other) / object–location memory
(OLM) (Other) / test–retest reliability (TRR) (Other) /
transcranial direct current stimulation (tDCS) (Other)},
cin = {AG Flöel},
ddc = {610},
cid = {I:(DE-2719)5000081},
pnm = {353 - Clinical and Health Care Research (POF4-353)},
pid = {G:(DE-HGF)POF4-353},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40635372},
pmc = {pmc:PMC12241688},
doi = {10.1002/brb3.70658},
url = {https://pub.dzne.de/record/279883},
}