Analysis of temporal variation in human masticatory cycles during gum chewing.

Autor: Crane EA; Department of Biologic and Materials Sciences, School of Dentistry, Ann Arbor, MI 48109-1078, USA. bcrane@umich.edu, Rothman ED, Childers D, Gerstner GE
Jazyk: angličtina
Zdroj: Archives of oral biology [Arch Oral Biol] 2013 Oct; Vol. 58 (10), pp. 1464-74. Date of Electronic Publication: 2013 Jul 31.
DOI: 10.1016/j.archoralbio.2013.06.009
Abstrakt: Objective: The study investigated modulation of fast and slow opening (FO, SO) and closing (FC, SC) chewing cycle phases using gum-chewing sequences in humans.
Design: Twenty-two healthy adult subjects participated by chewing gum for at least 20s on the right side and at least 20s on the left side while jaw movements were tracked with a 3D motion analysis system. Jaw movement data were digitized, and chewing cycle phases were identified and analysed for all chewing cycles in a complete sequence.
Results: All four chewing cycle phase durations were more variant than total cycle durations, a result found in other non-human primates. Significant negative correlations existed between the opening phases, SO and FO, and between the closing phases, SC and FC; however, there was less consistency in terms of which phases were negatively correlated both between subjects, and between chewing sides within subjects, compared with results reported in other species.
Conclusions: The coordination of intra-cycle phases appears to be flexible and to follow complex rules during gum-chewing in humans. Alternatively, the observed intra-cycle phase relationships could simply reflect: (1) variation in jaw kinematics due to variation in how gum was handled by the tongue on a chew-by-chew basis in our experimental design or (2) by variation due to data sampling noise and/or how phases were defined and identified.
(Copyright © 2013 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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