Regional Gray Matter Volume Links Rest-Activity Rhythm Fragmentation With Past Cognitive Decline.
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ABSTRACT: Objectives
We examined the extent to which measures of neurodegeneration and cerebrovascular disease explain the rest-activity rhythm (RAR)-cognition link.Methods
Seventy participants (mean age at MRI?=?86, standard deviation (SD)?=?2.6; 53% female) had cognitive, MRI, and accelerometer data. The slope of cognitive decline was defined applying a mixed model to 10 repeated Modified Mini Mental Status Test (3MS) measures over 14 years. Regional gray matter volume (GMV), white matter hyperintensities, and RARs were measured around year 12.Results
Past 3MS decline was related to RAR fragmentation (per SD ? = -0.43, 95% confidence interval: -0.73, -0.14) and lower posterior parietal GMV (per standard deviation ??=?0.47, 95% confidence interval: 0.14, 0.79). Higher RAR fragmentation was related to lower posterior parietal GMV (Pearson r = -0.39, n?=?70, p?=?0.0007), which attenuated the association of RAR fragmentation and past cognitive decline by 17%.Conclusions
Longitudinal studies are warranted to understand the temporal relations and mechanisms linking RAR fragmentation and neurodegeneration.
SUBMITTER: Smagula SF
PROVIDER: S-EPMC6980463 | biostudies-literature | 2020 Feb
REPOSITORIES: biostudies-literature
Publications
Regional Gray Matter Volume Links Rest-Activity Rhythm Fragmentation With Past Cognitive Decline.
Smagula Stephen F SF Chahine Lana L Metti Andrea A Rangarajan Anusha A Aizenstein Howard J HJ Tian Qu Q Rosano Caterina C
The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry 20190719 2
<h4>Objectives</h4>We examined the extent to which measures of neurodegeneration and cerebrovascular disease explain the rest-activity rhythm (RAR)-cognition link.<h4>Methods</h4>Seventy participants (mean age at MRI = 86, standard deviation (SD) = 2.6; 53% female) had cognitive, MRI, and accelerometer data. The slope of cognitive decline was defined applying a mixed model to 10 repeated Modified Mini Mental Status Test (3MS) measures over 14 years. Regional gray matter volume (GMV), white matte ...[more]
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