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• W2896657505 abstract "Cognitive rehabilitation (CR) improves autonomy of Alzheimer's disease (AD) patients in daily activities (IADL). We explored modification in brain networks related to CR using functional MRI (fMRI). 22 patients following CR (ADR) were compared with 21 patients (ADC) and 27 healthy controls (HC) performing a control intervention with paper-pencil exercises (3-4 months, 1-2 sessions/week). Participants were matched for age, education and gender. There was no difference in neuropsychological performance between the two patients’ groups. CR focused on IADL important for patient and caregiver, and was adapted to patient's preserved attentional and cognitive abilities. Participants performed an active fMRI session and an 8-min resting-state fMRI before (T1) and after (T2) their program. Delay between sessions was similar for all groups. In the active fMRI session, a short term memory task (STM) varying in load (5 vs 2 items) assessed load-dependent intervention of the dorsal (DAN) and ventral (VAN) attention networks (Majerus, 2012). In half of the trials, a distractor stimulus (DS) was presented during the STM maintenance phase to induce VAN stimulus-driven activity. Resting-state connectivity was investigated in DAN and VAN regions of interest using CONN toolbox. Autonomy in IADL improved in ADR patients between T1 and T2 (p<.01). There was a significant time x load x group interaction (p<.05), with faster responses at T2 than T1, only for the HC in load 2 condition. At the neural level for the STM task, the middle frontal gyrus (part of the DAN) was more activated at T2 vs T1 for the ADR relative to the other groups (p-corrected <.05), and this for the low load condition in the presence of DS. For rsfMRI, a three (groups) by two (T1 and T2) mixed ANOVA showed a significantly higher connectivity at T2 vs T1 between regions of the VAN (temporoparietal junction) and the DAN (intraparietal sulcus) in the ADR compared to both control groups (p-corrected<.05). After CR, the DAN was characterized by stronger involvement in an attention-demanding task and increased connectivity with the VAN, suggesting that CR may enhance attentional control abilities in early AD." @default.
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• W2896657505 date "2018-07-01" @default.
• W2896657505 modified "2023-10-16" @default.
• W2896657505 title "P1‐364: ENHANCED CONNECTIVITY BETWEEN DORSAL AND VENTRAL ATTENTION NETWORKS AFTER COGNITIVE REHABILITATION IN AD" @default.
• W2896657505 doi "https://doi.org/10.1016/j.jalz.2018.06.372" @default.
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