Figure 7. Trajectory of circling mouse.

The IsK^−/− mouse was filmed from above while it made five complete turns on wood surface (Fig. 4B). This figure illustrates the third turn. Cineradiography film captured at 250 Hz and data sampling at 50 Hz. A, trajectories in the horizontal plane of the extremities of the four limbs (abbreviations as in Fig. 5A). B, trajectories in the horizontal plane of the snout, the pelvis, the scapula and diaphragm (dia). The beginning and end of the trajectories are marked by circles and arrowheads, respectively.