Fig. 2. Midline kinematics in x–y coordinate space derived from the digitized outlines of each video frame (250 Hz). Colored circles correspond to each video frame shown in Fig. 1 for a response under low strain (A) and a response under high strain (B), starting with dark red colors and progressing through the colors of the rainbow to violet. Arrows denote orientation of the head as an extension of the first two digitized segments.