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Allometric scaling of brain regions to intra-cranial volume: An epidemiological MRI study.
https://arctichealth.org/en/permalink/ahliterature275481
Source
Hum Brain Mapp. 2016 Aug 25;
Publication Type
Article
Date
Aug-25-2016
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Author
Laura W de Jong
Jean-Sébastien Vidal
Lars E Forsberg
Alex P Zijdenbos
Thaddeus Haight
Sigurdur Sigurdsson
Vilmundur Gudnason
Mark A van Buchem
Lenore J Launer
Source
Hum Brain Mapp. 2016 Aug 25;
Date
Aug-25-2016
Language
English
Publication Type
Article
Abstract
There is growing evidence that sub-structures of the brain scale allometrically to total brain size, that is, in a non-proportional and non-linear way. Here, scaling of different volumes of interest (VOI) to intra-cranial volume (ICV) was examined. It was assessed whether scaling was allometric or isometric and whether scaling coefficients significantly differed from each other. We also tested to what extent allometric scaling of VOI was introduced by the automated segmentation technique. Furthermore, reproducibility of allometric scaling was studied different age groups and study populations. Study samples included samples of cognitively healthy adults from the community-based Age Gene/Environment Susceptibility-Reykjavik Study (AGES-Reykjavik Study) (N?=?3,883), the Coronary Artery Risk Development in Young Adults Study (CARDIA) (N =709), and the Alzheimer's Disease Neuroimaging Initiative (ADNI) (N?=?180). Data encompassed participants with different age, ethnicity, risk factor profile, and ICV and VOI obtained with different automated MRI segmentation techniques. Our analysis showed that (1) allometric scaling is a trait of all parts of the brain, (2) scaling of neo-cortical white matter, neo-cortical gray matter, and deep gray matter structures including the cerebellum are significantly different from each other, and (3) allometric scaling of brain structures cannot solely be explained by age-associated atrophy, sex, ethnicity, or a systematic bias from study-specific segmentation algorithm, but appears to be a true feature of brain geometry. Hum Brain Mapp, 2016. © 2016 Wiley Periodicals, Inc.
PubMed ID
27557999
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