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Auteur Elizabeth A. MOLLOY |
Documents disponibles écrits par cet auteur (1)
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A pediatric twin study of brain morphometry / Gregory L. WALLACE in Journal of Child Psychology and Psychiatry, 47-10 (October 2006)
[article]
Titre : A pediatric twin study of brain morphometry Type de document : Texte imprimé et/ou numérique Auteurs : Gregory L. WALLACE, Auteur ; Michael A. ROSENTHAL, Auteur ; Michael C. NEALE, Auteur ; Kenneth S. KENDLER, Auteur ; Liv S. CLASEN, Auteur ; Elizabeth A. MOLLOY, Auteur ; Sarah ORDAZ, Auteur ; Essi VIDING, Auteur ; Rhoshel LENROOT, Auteur ; J. Eric SCHMITT, Auteur ; Jay N. GIEDD, Auteur Année de publication : 2007 Article en page(s) : p.987–993 Langues : Anglais (eng) Mots-clés : Brain-development brain-imaging pediatric twin behavioral-genetics Index. décimale : PER Périodiques Résumé : Background: Longitudinal pediatric neuroimaging studies have demonstrated increasing volumes of white matter and regionally-specific inverted U shaped developmental trajectories of gray matter volumes during childhood and adolescence. Studies of monozygotic and dyzygotic twins during this developmental period allow exploration of genetic and non-genetic influences on these developmental trajectories.
Method: Magnetic resonance imaging brain scans were acquired on a pediatric sample of 90 monozygotic twin pairs, 38 same-sex dyzygotic twin pairs, and 158 unrelated typically developing singletons. Structural equation modeling was used to estimate the additive genetic, common environment, and unique environment effects, as well as age by heritability interactions, on measures of brain volumes from these images.
Results: Consistent with previous adult studies, additive genetic effects accounted for a substantial portion of variability in nearly all brain regions with the notable exception of the cerebellum. Significant age by heritability interactions were observed with gray matter volumes showing a reduction in heritability with increasing age, while white matter volume heritability increased with greater age.
Conclusion: Understanding the relative contributions of genetic and nongenetic factors on developmental brain trajectories may have implications for better understanding brain-based disorders and typical cognitive development.En ligne : http://dx.doi.org/10.1111/j.1469-7610.2006.01676.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=788
in Journal of Child Psychology and Psychiatry > 47-10 (October 2006) . - p.987–993[article] A pediatric twin study of brain morphometry [Texte imprimé et/ou numérique] / Gregory L. WALLACE, Auteur ; Michael A. ROSENTHAL, Auteur ; Michael C. NEALE, Auteur ; Kenneth S. KENDLER, Auteur ; Liv S. CLASEN, Auteur ; Elizabeth A. MOLLOY, Auteur ; Sarah ORDAZ, Auteur ; Essi VIDING, Auteur ; Rhoshel LENROOT, Auteur ; J. Eric SCHMITT, Auteur ; Jay N. GIEDD, Auteur . - 2007 . - p.987–993.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 47-10 (October 2006) . - p.987–993
Mots-clés : Brain-development brain-imaging pediatric twin behavioral-genetics Index. décimale : PER Périodiques Résumé : Background: Longitudinal pediatric neuroimaging studies have demonstrated increasing volumes of white matter and regionally-specific inverted U shaped developmental trajectories of gray matter volumes during childhood and adolescence. Studies of monozygotic and dyzygotic twins during this developmental period allow exploration of genetic and non-genetic influences on these developmental trajectories.
Method: Magnetic resonance imaging brain scans were acquired on a pediatric sample of 90 monozygotic twin pairs, 38 same-sex dyzygotic twin pairs, and 158 unrelated typically developing singletons. Structural equation modeling was used to estimate the additive genetic, common environment, and unique environment effects, as well as age by heritability interactions, on measures of brain volumes from these images.
Results: Consistent with previous adult studies, additive genetic effects accounted for a substantial portion of variability in nearly all brain regions with the notable exception of the cerebellum. Significant age by heritability interactions were observed with gray matter volumes showing a reduction in heritability with increasing age, while white matter volume heritability increased with greater age.
Conclusion: Understanding the relative contributions of genetic and nongenetic factors on developmental brain trajectories may have implications for better understanding brain-based disorders and typical cognitive development.En ligne : http://dx.doi.org/10.1111/j.1469-7610.2006.01676.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=788