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@ARTICLE{Franzmeier:139148,
author = {Franzmeier, Nicolai and Duering, Marco and Weiner, Michael
and Dichgans, Martin and Ewers, Michael and Initiative,
Alzheimer's Disease Neuroimaging},
title = {{L}eft frontal cortex connectivity underlies cognitive
reserve in prodromal {A}lzheimer disease.},
journal = {Neurology},
volume = {88},
number = {11},
issn = {0028-3878},
address = {[S.l.]},
publisher = {Ovid},
reportid = {DZNE-2020-05470},
pages = {1054-1061},
year = {2017},
abstract = {To test whether higher global functional connectivity of
the left frontal cortex (LFC) in Alzheimer disease (AD) is
associated with more years of education (a proxy of
cognitive reserve [CR]) and mitigates the association
between AD-related fluorodeoxyglucose (FDG)-PET
hypometabolism and episodic memory.Forty-four
amyloid-PET-positive patients with amnestic mild cognitive
impairment (MCI-Aβ+) and 24 amyloid-PET-negative healthy
controls (HC) were included. Voxel-based linear regression
analyses were used to test the association between years of
education and FDG-PET in MCI-Aβ+, controlled for episodic
memory performance. Global LFC (gLFC) connectivity was
computed through seed-based resting-state fMRI correlations
between the LFC (seed) and each voxel in the gray matter. In
linear regression analyses, education as a predictor of gLFC
connectivity and the interaction of gLFC connectivity ×
FDG-PET hypometabolism on episodic memory were
tested.FDG-PET metabolism in the precuneus was reduced in
MCI-Aβ+ compared to HC (p = 0.028), with stronger
reductions observed in MCI-Aβ+ with more years of education
(p = 0.006). In MCI-Aβ+, higher gLFC connectivity was
associated with more years of education (p = 0.021). At
higher levels of gLFC connectivity, the association between
precuneus FDG-PET hypometabolism and lower memory
performance was attenuated (p = 0.027).Higher gLFC
connectivity is a functional substrate of CR that helps to
maintain episodic memory relatively well in the face of
emerging FDG-PET hypometabolism in early-stage AD.},
keywords = {Alzheimer Disease: complications / Alzheimer Disease:
diagnostic imaging / Alzheimer Disease: pathology /
Chi-Square Distribution / Cognition Disorders: etiology /
Cognitive Reserve: physiology / Epilepsy: diagnostic imaging
/ Epilepsy: etiology / Female / Fluorodeoxyglucose F18:
metabolism / Frontal Lobe: diagnostic imaging / Frontal
Lobe: pathology / Functional Laterality: physiology / Humans
/ Magnetic Resonance Imaging / Male / Nerve Net: pathology /
Neuropsychological Tests / Oxygen: blood / Positron-Emission
Tomography / Prodromal Symptoms / Fluorodeoxyglucose F18
(NLM Chemicals) / Oxygen (NLM Chemicals)},
cin = {Clinical Dementia Research München},
ddc = {610},
cid = {I:(DE-2719)1111016},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28188306},
pmc = {pmc:PMC5384837},
doi = {10.1212/WNL.0000000000003711},
url = {https://pub.dzne.de/record/139148},
}