Fig. 5. An example of corrective roll turn performed by a spinalized animal. (A,B) The side and top views in twelve consecutive frames are analogous to those in Fig. 2.(C–E) The curvature plots in the transverse plane for frames 4, 8 and 12; they are analogous to frames 3, 13 and 18 in Fig. 3: rolling accelerates, rolling decelerates, body is straightened. In frame 4, the level of spinalization is indicated with arrows; the part of the body caudal to the spinalization site is shown in grey. The curvature graph for the body part rostral to the spinalization level is shown with solid lines, while that for the part caudal to the spinalization is shown with broken lines. R, right; L, left; D, dorsal; V, ventral sides of the body. White dots in A and B are the white markers attached to the skin along the dorsal midline.