Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/59266
Title: Decreased Default Mode Network connectivity correlates with age-associated structural and cognitive changes
Author: Vidal Piñeiro, Dídac
Valls-Pedret, Cinta
Fernández-Cabello, Sara
Arenaza-Urquijo, Eider Maria
Sala Llonch, Roser
Solana Díaz, Elisabeth
Bargalló Alabart, Núria​
Junqué i Plaja, Carme, 1955-
Ros Rahola, Emilio
Bartrés Faz, David
Keywords: Envelliment
Envelliment cerebral
Funcions executives (Neuropsicologia)
Ressonància magnètica
Aging
Aging brain
Executive functions (Neuropsychology)
Magnetic resonance
Issue Date: 25-Sep-2014
Publisher: Frontiers Media
Abstract: Ageing entails cognitive and motor decline as well as brain changes such as loss of gray (GM) and white matter (WM) integrity, neurovascular and functional connectivity alterations. Regarding connectivity, reduced resting-state fMRI connectivity between anterior and posterior nodes of the Default Mode Network (DMN) relates to cognitive function and has been postulated to be a hallmark of ageing. However, the relationship between age-related connectivity changes and other neuroimaging-based measures in ageing is fragmentarily investigated. In a sample of 116 healthy elders we aimed to study the relationship between antero-posterior DMN connectivity and measures of WM integrity, GM integrity and cerebral blood flow (CBF), assessed with an arterial spin labeling sequence. First, we replicated previous findings demonstrating DMN connectivity decreases in ageing and an association between antero-posterior DMN connectivity and memory scores. The results showed that the functional connectivity between posterior midline structures and the medial prefrontal cortex was related to measures of WM and GM integrity but not to CBF. Gray and WM correlates of anterio-posterior DMN connectivity included, but were not limited to, DMN areas and cingulum bundle. These results resembled patterns of age-related vulnerability which was studied by comparing the correlates of antero-posterior DMN with age-effect maps. These age-effect maps were obtained after performing an independent analysis with a second sample including both young and old subjects. We argue that antero-posterior connectivity might be a sensitive measure of brain ageing over the brain. By using a comprehensive approach, the results provide valuable knowledge that may shed further light on DMN connectivity dysfunctions in ageing.
Note: Reproducció del document publicat a: http://dx.doi.org/10.3389/fnagi.2014.00256
It is part of: Frontiers in Aging Neuroscience, 2014, vol. 6, num. 256
Related resource: http://dx.doi.org/10.3389/fnagi.2014.00256
URI: http://hdl.handle.net/2445/59266
ISSN: 1663-4365
Appears in Collections:Articles publicats en revistes (Psicologia Clínica i Psicobiologia)

Files in This Item:
File Description SizeFormat 
644158.pdf1.72 MBAdobe PDFView/Open


This item is licensed under a Creative Commons License Creative Commons