Mice were placed into an activity chamber for 20 minutes (1,200 sec). Measurements taken were time with large ambulatory movements (A, D), distance traveled (B, E), and resting time when no movement was detected (C, D). Results represent the mean ± SD from six animals in the sham groups (A–C) and seven animals in the DMM groups (E–H). *p<0.05, **p<0.01.