FEMUR-BENDING PROPERTIES AS INFLUENCED BY GRAVITY .3. SEX-RELATED WEAKNESS AFTER 4-G MOUSE GROWTH

  • 1 January 1977
    • journal article
    • research article
    • Vol. 48  (11) , 1023-1025
Abstract
Optimum gravitational intensity for growth stimulation depends upon the type of growth measurement. Although the 4-g field resulted in relatively weaker male bones, relative bone size increased. The more moderate 3-g field also stimulated relative bone-strengh. Femurs from 36 male white mice demonstrated no growth of load-supporting ability Fu [bending force] after 1-8 wk of chronic centrifugation at 4-g from the 5th wk of age. Although measurable with 35 female mice, this growth tended to fall below the control rate. When compared to 82 younger control femurs of the same cross-sectional geometry, experimental female femurs could sustain comparable moments Mu [bending movement] while experimental male femurs could not.