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López García, María Eugenia and Aurtenetxe, Sara and Pereda, Ernesto and Cuesta Prieto, Pablo and Perales Castellanos, Nazareth and Bruña Fernandez, Ricardo and Niso Galán, Julia Guiomar and Maestu Unturbe, Fernando and Bajo Breton, Ricardo (2014). Cognitive reserve is associated with the functional organization of brain networks in healthy aging: a MEG study. "Frontiers in Aging Neuroscience", v. 6 (n. 125); pp. 1-9. ISSN 1663-4365.
|Title:||Cognitive reserve is associated with the functional organization of brain networks in healthy aging: a MEG study|
|Título de Revista/Publicación:||Frontiers in Aging Neuroscience|
|Freetext Keywords:||Brain efficiency, cognitive reserve, functional connectivity, healthy aging, MEG|
|Faculty:||Centro de Tecnología Biomédica (CTB) (UPM)|
|Department:||Tecnología Fotónica y Bioingeniería|
|Creative Commons Licenses:||Recognition - No derivative works - Non commercial|
The proportion of elderly people in the population has increased rapidly in the last century and consequently "healthy aging" is expected to become a critical area of research in neuroscience. Evidence reveals how healthy aging depends on three main behavioral factors: social lifestyle, cognitive activity and physical activity. In this study, we focused on the role of cognitive activity, concentrating specifically on educational and occupational attainment factors, which were considered two of the main pillars of cognitive reserve. 21 subjects with similar rates of social lifestyle, physical and cognitive activity were selected from a sample of 55 healthy adults. These subjects were divided into two groups according to their level of cognitive reserve; one group comprised subjects with high cognitive reserve (9 members) and the other contained those with low cognitive reserve (12 members). To evaluate the cortical brain connectivity network, all participants were recorded by Magnetoencephalography (MEG) while they performed a memory task (modified version of the Sternberg¿s Task). We then applied two algorithms (Phase Locking Value & Phase-Lag Index) to study the dynamics of functional connectivity. In response to the same task, the subjects with lower cognitive reserve presented higher functional connectivity than those with higher cognitive reserve. These results may indicate that participants with low cognitive reserve needed a greater 'effort' than those with high cognitive reserve to achieve the same level of cognitive performance. Therefore, we conclude that cognitive reserve contributes to the modulation of the functional connectivity patterns of the aging brain.
|Deposited by:||Memoria Investigacion|
|Deposited on:||15 Jun 2015 07:14|
|Last Modified:||24 Jun 2015 16:06|