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First published online August 17, 2007
Journal of Experimental Biology 210, 3117-3125 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.006544
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Increased non-linear locomotion alters diaphyseal bone shape

Kristian J. Carlson1,* and Stefan Judex2

1 Department of Anatomy, New York College of Osteopathic Medicine, Northern Boulevard, Old Westbury, NY 11568-8000, USA
2 Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794, USA


Figure 1
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  		Fig. 1. The first experimental group (A; linear mice) was housed in a standard rat container with a modified tunnel apparatus designed to emphasize linear locomotion. The second experimental group (B; turning mice) was housed in the same type of container, but with a modified tunnel apparatus designed to emphasize changes in travel direction during locomotion (i.e. turning). Food and water sources were available at either end of the cages.

 

Figure 2
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  		Fig. 2. Plots for group shape ratios (Iy/Ix) at femoral 35% diaphysis (A) and 50% diaphysis (B). Values are means ± 1 s.d. Note that the highest mean values are observed in the turning group at both diaphyseal locations. *Group with statistically significant difference in the plotted shape ratio.

 

Figure 3
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  		Fig. 3. Representative femoral midshaft cross sections from linear group (top), turning group (middle) and control group (bottom). Note the slightly greater mediolateral distribution of bone in the turning subject relative to subjects from the other two groups, which both have slightly more circular cross sections (black areas).

 

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© The Company of Biologists Ltd 2007