Normative data for subcortical regional volumes over the lifetime of the adult human brain

Auteur(s): Potvin, Olivier; Duchesne, Simon
Résumé: Normative data for volumetric estimates of brain structures are necessary to adequately assess brain volume alterations in individuals with suspected neurological or psychiatric conditions. Although many studies have described age and sex effects in healthy individuals for brain morphometry assessed via magnetic resonance imaging, proper normative values allowing to quantify potential brain abnormalities are needed. We developed norms for volumetric estimates of subcortical brain regions based on cross-sectional magnetic resonance scans from 2790 healthy individuals aged 18 to 94 years using 23 samples provided by 21 independent research groups. The segmentation was conducted using FreeSurfer, a widely used and freely available automated segmentation software. Models predicting subcortical regional volumes of each hemisphere were produced including age, sex, estimated total intracranial volume (eTIV), scanner manufacturer, magnetic field strength, and interactions as predictors. The mean explained variance by the models was 48%. For most regions, age, sex and eTIV predicted most of the explained variance while manufacturer, magnetic field strength and interactions predicted a limited amount. Estimates of the expected volumes of an individual based on its characteristics and the scanner characteristics can be obtained using derived formulas. For a new individual, significance test for volume abnormality, effect size and estimated percentage of the normative population with a smaller volume can be obtained. Normative values were validated in independent samples of healthy adults and in adults with Alzheimer's disease and schizophrenia.
Date de publication: 7 mai 2016
Date de la mise en libre accès: 7 mai 2017
Version du document: Accepted Manuscript
Lien permanent: http://hdl.handle.net/20.500.11794/1141
Ce document a été publié dans: NeuroImage
http://dx.doi.org/10.1016/j.neuroimage.2016.05.016
Academic Press
Autre version disponible: 10.1016/j.neuroimage.2016.05.016
Collection(s) :Articles publiés dans des revues avec comité de lecture

Fichier(s) :
TailleFormat 
Potvin Subcortical UL.pdf4.14 MBAdobe PDF    Demander une copie
Tous les documents dans CorpusUL sont protégés par la Loi sur le droit d'auteur du Canada.