Article (Scientific journals)
Metabolic and structural connectivity within the default mode network relates to working memory performance in young healthy adults
Yakushev, Igor; Chételat, Gael; Fischer F.U. et al.
2013In NeuroImage, 79, p. 184-190
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Abstract :
[en] Studies of functional connectivity suggest that the default mode network (DMN) might be relevant for cognitive functions. Here, we examined metabolic and structural connectivity between major DMN nodes, the posterior cingulate (PCC) and medial prefrontal cortex (MPFC), in relation to normal working memory (WM). DMN was captured using independent component analysis of [18F]fluorodeoxyglucose positron emission tomography (FDG-PET) data from 35 young healthy adults (27.1±5.1 years). Metabolic connectivity, a correlation between FDG uptake in PCC and MPFC, was examined in groups of subjects with (relative to median) low (n=18) and high (n=17) performance on digit span backward test as an index of verbal WM. In addition, fiber tractography based on PCC and MPFC nodes as way points was performed in a subset of subjects. FDG uptake in the DMN nodes did not differ between high and low performers. However, significantly (p=0.01) lower metabolic connectivity was found in the group of low performers. Furthermore, as compared to high performers, low performers showed lower density of the left superior cingulate bundle. Verbal WM performance is related to metabolic and structural connectivity within the DMN in young healthy adults. Metabolic connectivity as quantified with FDG-PET might be a sensitive marker of the normal variability in some cognitive functions.
Disciplines :
Neurosciences & behavior
Author, co-author :
Yakushev, Igor
Chételat, Gael
Fischer F.U.
Lanbeau, Brigitte
Bastin, Christine  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Scheurich, Armin
Perrotin, Audrey
Bahri, Mohamed Ali  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Drzezga, Alexander
Eustache, Francis
Schreckenberger, Matthias
Fellgiebel, Andreas
Salmon, Eric  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
More authors (3 more) Less
Language :
English
Title :
Metabolic and structural connectivity within the default mode network relates to working memory performance in young healthy adults
Publication date :
2013
Journal title :
NeuroImage
ISSN :
1053-8119
eISSN :
1095-9572
Publisher :
Elsevier Science, Orlando, United States - Florida
Volume :
79
Pages :
184-190
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 April 2013

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