Figure 8.

Mouse footfall analysis. Isolated frames from a right hind paw footfall during an uninterrupted stride of normal walking by a wild type (WT) and integrin α1-null (α1-null) female mouse (n = 12). Numbers above the images indicate frame numbers. Frames 20, 25, 30, and 33 from the footfall of the wild-type mouse have been enlarged below to demonstrate spatial resolution. Note how digits are splayed throughout footfall and that contact begins with digits 1, 2, and 5, followed quickly by the entire plantar surface. The heel and then the metatarsals are lifted, followed by digits 1 and 5, and finally digits 2, 3, and 4. Video captured at 240 fps, 720 ppi.