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2004 FEB 5 - (NewsRx.com & NewsRx.net) -- Genes and environmental factors power postural balance in older females.
"The aim of the present study was to determine the relative roles of genetic and environmental influences on postural balance in older women. The participants were 97 monozygotic (MZ) and 102 dizygotic (DZ) female twins, aged 64 - 76 years. Postural sway was measured during side-by-side stance with eyes open and eyes closed, and during semitandem stance with eyes open on a force platform," investigators in Finland report.
"Sway data were condensed into four first-order and one second-order latent factors. The second-order factor, named balance, incorporates sway data from multiple tests and thus best describes the phenotype of postural balance. The contribution of genetic and environmental influences on the variability of the latent factors was assessed by using structural equation modeling," said S. Pajala and colleagues, University of Jyvaskyla, Finnish Center for Interdisciplinary Gerontology.
"Additive genetic influences accounted for 35% and shared environmental influences accounted for 24% of the total variance in the balance factor," they reported.
"In the present study, postural ...
Source: HighBeam Research, Genes and environmental factors power postural balance in older...