Article (Scientific journals)
Activity/rest cycle and disturbances of structural backbone of cerebral networks in aging.
Baillet, Marion; Dilharreguy, Bixente; Pérès, Karine et al.
2017In NeuroImage, 146, p. 814-820
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Keywords :
Actigraphy; Activity-rest cycle; Aging; MRI; Diffusion Tensor Imaging
Abstract :
[en] OBJECTIVE: Although aging is associated with alterations of both activity/rest cycle and brain structure, few studies have evaluated associations between these processes. The aim of this study was to examine relationship between activity/rest cycle quality and brain structural integrity in aging subjects by exploring both grey and white matter compartments. MATERIAL AND METHODS: Fifty-eight elderly subjects (76±0.5 years; 41% female) without dementia, sleep disorders and medications were included in the analysis. Actigraphy was used to measure parameters of activity/rest cycle (24-h amplitude, 24-h fragmentation and 24-h stability) and sleep (total sleep time and sleep fragmentation) over a minimal period of 5 days. Whole brain linear regression analyses were performed on grey matter volumes maps using voxel based morphometry and on white matter integrity using tract based statistics analyses. RESULTS: A lower 24-h amplitude and a higher sleep fragmentation were independently associated with a reduction of white matter integrity in models including age and gender as covariates. The association between 24-h amplitude and white matter integrity decreased but remained significant in a model accounted for sleep fragmentation, indicating a specific effect of 24-h cycle disturbances. No association with grey matter volumes was observed. CONCLUSION: In elderly, not only sleep but also 24-h cycle disturbances were associated with altered structural connectivity. This alteration of structural backbone networks related to activity/rest cycle disturbances in aging might constitute a cerebral frailty factor for the development of cognitive impairment.
Disciplines :
Neurosciences & behavior
Author, co-author :
Baillet, Marion ;  Université de Liège - ULiège > GIGA CRC In vivo Imaging
Dilharreguy, Bixente
Pérès, Karine
Dartigues, Jean-François
Mayo, Willy
Catheline, Gwenaëlle
Language :
English
Title :
Activity/rest cycle and disturbances of structural backbone of cerebral networks in aging.
Publication date :
2017
Journal title :
NeuroImage
ISSN :
1053-8119
eISSN :
1095-9572
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
146
Pages :
814-820
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright © 2016 Elsevier Inc. All rights reserved.
Available on ORBi :
since 09 November 2020

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