Activation changes induced by cognitive training are consistent with improved cognitive reserve in older adults with subjective cognitive decline

Belleville, S., Mellah, S., Boller, B. et Ouellet, É (2023). Activation changes induced by cognitive training are consistent with improved cognitive reserve in older adults with subjective cognitive decline. Neurobiology of Aging, 121 . pp. 107-118. ISSN 0197-4580 DOI 10.1016/j.neurobiolaging.2022.10.010

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Functional magnetic resonance imaging (fMRI) was used to assess the effect of cognitive training on brain activation as a function of the learning phase and level of education. Forty older adults with subjective cognitive decline (SCD) received 6 1-hour memory training sessions with the method of loci. Brain imaging (N = 29) was measured during word list encoding and retrieval before training (PRE), after 3 training sessions (POST3), and after 6 training sessions (POST6). Participants showed increased activation of the left inferior pre-frontal gyrus from PRE to POST6 during encoding and reduced bilateral frontostriatal activation from PRE to POST3 during retrieval, regardless of education. Activation changes from PRE to POST3 varied as a function of education in 2 regions of the right temporal lobe: participants with lower education showed increased activation, while those with higher education showed decreased activation. These regions were initially less active in people with lower education. Results suggest a strategic shift in people with lower education and expertise building in those with higher education, along with a restoration of initial education-related differences.

Type de document:	Article
Mots-clés libres:	Aging Cognitive reserve Cognitive training Education fMRI Subjective cognitive decline Adult Aged Article Behavior assessment Clinical article Cognition Cognitive defect Controlled study Episodic memory Female Functional magnetic resonance imaging Human Inferior frontal gyrus Information retrieval Male Memory Mental task Temporal lobe Brain Nuclear magnetic resonance imaging Physiology Procedures Cognitive Dysfunction Humans Magnetic Resonance Imaging
Date de dépôt:	11 juill. 2023 11:44
Dernière modification:	11 juill. 2023 11:44
Version du document déposé:	Version officielle de l'éditeur
URI:	https://depot-e.uqtr.ca/id/eprint/10710

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