Article (Scientific journals)
Controlled Memory Processes in Questionable Alzheimer's Disease: A View from Neuroimaging Research
Bastin, Christine; Kerrouche N; Lekeu, Françoise et al.
2010In Journal of Alzheimer's Disease, 20 (2), p. 547-560
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Keywords :
Alzheimer; neuroimaging; controlled processes
Abstract :
[en] Alzheimer's disease (AD) is characterized by a progressive loss of controlled cognitive processes, and neuroimaging studies at early stages of AD provide an opportunity to tease out the neural correlates of controlled processes. Accordingly, controlled and automatic memory performance was assessed with the Process Dissociation Procedure in 50 patients diagnosed with questionable Alzheimer's disease (QAD). The patients' brain glucose metabolism was measured using FDG-PET. After a follow-up period of 36 months, 27 patients had converted to AD, while 23 remained stable. Both groups showed a similar decrease in controlled memory processes but preserved automatic processes at entry into the study. Voxel-based cognitive and metabolic correlations showed that a decrease in controlled memory processes was preferentially correlated with lower activity in the dorsomedial prefrontal and posterior cingulate cortices in very early AD patients. In stable QAD patients, reduced controlled performance in verbal memory correlated with impaired activity in the left anterior hippocampal structure. The results demonstrated the central role of a medial frontal-posterior cingulate network for controlled processing of episodic memory in the early stages of AD.
Research center :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Disciplines :
Neurology
Author, co-author :
Bastin, Christine  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Kerrouche N
Lekeu, Françoise ;  Université de Liège - ULiège > Neurologie Sart Tilman - Gériatrie
Adam, Stéphane  ;  Université de Liège - ULiège > Département de personne et société > Psychologie de la sénescence
Guillaume B
Lemaire, Christian ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Aerts, Joël ;  Université de Liège - ULiège > Centre de recherches du cyclotron
d'Idewalle G
Collette, Fabienne  ;  Université de Liège - ULiège > Département des sciences cognitives > Neuropsychologie
Salmon, Eric  ;  Université de Liège - ULiège > Département des sciences cliniques > Neuroimagerie des troubles de la mémoire et révalid. cogn.
Language :
English
Title :
Controlled Memory Processes in Questionable Alzheimer's Disease: A View from Neuroimaging Research
Publication date :
June 2010
Journal title :
Journal of Alzheimer's Disease
ISSN :
1387-2877
eISSN :
1875-8908
Publisher :
IOS Press
Volume :
20
Issue :
2
Pages :
547-560
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FNRS; IUAP; European project DIMI
Available on ORBi :
since 05 May 2010

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