Figure 7. The movement of the anterior tongue marker (see Fig. 2A) relative to the palate during complete sequences of feeding on soft food (chicken spread, left) and hard food (cookie, right). The tongue surface cycles so that it is traveling upward and forward as the teeth come into full occlusion, then forward and downward in the last stages of the intercuspal phase (as the teeth come out of occlusion) and in the first part of opening. This Fig. shows the progressive palatal (upward) ‘migration’ of the tongue surface cycle as the feeding sequence proceeds. The pattern of that migration differs between hard and soft foods. From Palmer et al.(1997), with permission from Pergamon Press.