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Head Movements during Chewing: Relation to Size and Texture of Bolus

¹ Department of Odontology, Clinical Oral Physiology, Umeå University, S-901 87 Umeå, Sweden; and
² Centre for Musculoskeletal Research, Gävle University, Sweden;

View larger version (32K): [in a new window]   Figure 1. Mandibular and head movement patterns for one subject during chewing of different boluses displayed in frontal view (A) and 3D movement amplitudes against time (B).

View larger version (23K): [in a new window]   Figure 2. Head extension in relation to start position (baseline) and in relation to mandibular movement cycles (A). Mean head extension for the group (n = 12), at the start of chewing cycles nos. 1, 2, 5, 10, 15, and 20 for the different boluses (B). Wilcoxon matched-pairs test for differences in head extension between these time points: * p < 0.05; ** p < 0.01. Note differences in head extension between start of cycle 1 and start of cycle 2 for all boluses. Definitions of preparatory head extension and head movements (C).

View larger version (13K): [in a new window]   Figure 3. Box and whisker plots (median, quartiles, and range) of head and mandibular movement amplitudes during chewing of boluses of different sizes and textures for the group (n = 12). P-values (Wilcoxon matched-pairs test) indicate differences in amplitudes in the chewing of boluses of different sizes and textures.