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. 2009 Dec 23;4(12):e8466. doi: 10.1371/journal.pone.0008466

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Salvatore et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Mean for the age tested represented by horizontal line and the locomotor activities of test subjects represented by points. The young group was tested at 4 and 12 months and the old group tested at 22 and 30 months. a. movement number (ANOVA, group p<0.0001; post-hoc 12 vs. 30 mos, p<0.05): aging difference within group, 4 vs. 12 mos., p<0.05; 22 vs. 30 mos., p<0.05 (Student's paired t-test used for all within group comparisons). b. horizontal activity (ANOVA, group p<0.0001; post-hoc 12 vs. 30 mos., p<0.01): aging difference within group, 4 vs. 12 mos., p<0.05; 22 vs. 30 mos., p<0.05. c. time spent moving (ANOVA, group p<0.0001; post-hoc 12 vs. 30 mos., p<0.05): aging difference within group, 4 vs. 12 mos., p<0.05; 22 vs. 30 mos., p<0.05. Data not shown: total distance (ANOVA, group p<0.0001; post-hoc 12 vs. 30 mos, p<0.05): age difference within group, 4 vs. 12 mos., p<0.05; 22 vs. 30 mos., p>0.05, and movement velocity (ANOVA, group p<0.005; post-hoc 12 vs. 30 mos., p>0.05): aging difference within group, 4 vs. 12 mos., p<0.05; 22 vs. 30 mos., p<0.05.