Journal
JOURNAL OF DENTAL RESEARCH
Volume 83, Issue 11, Pages 864-868Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/154405910408301108
Keywords
bolus; chewing; head; neck; jaw
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Coordinated mandibular and head-neck movements during jaw opening-closing activities suggest a close functional linkage between the jaw and the neck regions. The present study investigated whether size and texture of bolus can influence head-neck behavior during chewing. Using an optoelectronic 3-D recording technique, we analyzed concomitant mandibular and head-neck movements in 12 healthy adults chewing small ( 3 g) and large ( 9 g) boluses of chewing gum and Optosil(R). The main finding was a head extension during chewing, the amount of which was related mainly to bolus size. Furthermore, each chewing cycle was accompanied not only by mandibular movements, but also by head extension-flexion movements. Larger head movement amplitudes were correlated with larger size and, to some extent, also with harder texture of the bolus. The results suggest that head-neck behavior during chewing is modulated in response to changes in jaw sensory-motor input.
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