Fig. 4. Kinematic profiles of relative gape distance over time for one male hamster during (A) mastication, (B) pouching large food items and (C) pouching small food items, measured in arbitrary scale units (a function of image size on the video display, to the nearest 0.5 unit) using points on the lower jaw and rostrum. Measurements end where views were obstructed (A,B) or where the pouching event ended (C). Shaded areas at maximum gape distance (B,C) illustrate `gape phase'. Note that `0' refers to the minimum gape distance for each set of measurements, and in B, does not indicate full occlusion.