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Frequency-dependent Modulation of Rhythmic Human Jaw Movements
T. Morimoto
Department of Oral Physiology and Department of Dental Prosthetics, Osaka University, Faculty of Dentistry, 1-8, Yamadaoka, Suita, Osaka, 565, Japan
T. Inoue
Department of Oral Physiology and Department of Dental Prosthetics, Osaka University, Faculty of Dentistry, 1-8, Yamadaoka, Suita, Osaka, 565, Japan
T. Nakamura
Department of Oral Physiology and Department of Dental Prosthetics, Osaka University, Faculty of Dentistry, 1-8, Yamadaoka, Suita, Osaka, 565, Japan
Y. Kawamura
Department of Oral Physiology and Department of Dental Prosthetics, Osaka University, Faculty of Dentistry, 1-8, Yamadaoka, Suita, Osaka, 565, Japan
Modulation of jaw movement patterns by alteration of the chewing rhythm was analyzed in nine subjects. Jaw movements were monitored by an electronic transducer system. The subjects were asked to chew gum either at voluntarily determined rates or at rates guided by a light flash that varied from 2 to 7 Hz at 1-Hz intervals. The results can be summarized as follows: (1) Chewing was generally conducted at rates below 3 Hz when the rhythm was voluntarily determined. When the rhythm was guided, however, the maximum chewing rate could occasionally be raised up to 6 Hz; (2) the duration of the chewing cycle was more closely related to changes in the duration of the opening and occlusion phases than to that of the closing phase; (3) at chewing rates below 3 Hz, the maximum gape did not appreciably change with the chewing rhythm, while it decreased linearly at rates above 3 Hz; and (4) at chewing rates below 3 Hz, the jaw opening velocity increased with speed of chewing, whereas it decreased or sometimes fluctuated over a wide range at rates above 3 Hz. It is concluded that, during normal mastication at rates below 3 Hz, chewing rhythm is altered by changing both the velocity of jaw opening and the duration of the occlusion phase.
REFERENCES
- Ahlgren, J. (1966): Mechanisms of Mastication, Acta Odontol Scand 24 (Suppl. 44):1-109.
- Ahlgren, J. (1976): Masticatory Movements in Man. In: Mastication, D.J. Anderson and B. Matthews, Eds., Bristol: Wright, pp. 119-130.
- Atkinson, H.F. and Faulkner, K.D.B. (1981): A Re-examination of Mandibular Movement using a Closed Circuit Television Detector, Aust Dent J 26: 390-394.[Medline]
[Order article via Infotrieve]
- Bates, J.F.; Stafford, G.D.; and Harrison, A. (1975): Masticatory Function-A Review of the Literature. (II) Speed of Movement of the Mandible, Rate of Chewing and Forces Developed in Chewing, J Oral Rehabil 2:349-369.
- Dubner, R.; Sessle, B.J.; and Storey, A.T. (1978): The Neural Basis of Oral and Facial Function. New York: Plenum, pp. 311-347.
- Gillings, B.R.D.; Graham, C.H.; and Duckmanton, N.A. (1973): Jaw Movements in Young Adult Men during Chewing, J Prosthet Dent 29:615-627.
- Gorniak, G.C. and Gans, C. (1980): Quantitative Assay of Electromyograms during Mastication in Domestic Cats (Felis catus), J Morphol 163:253-281.[CrossRef][Medline]
[Order article via Infotrieve]
- Hannam, A.G.; DE Cou, R.E.; Scott, J.D.; and Wood, W.W. (1977): The Relationship Between Dental Occlusion, Muscle Activity and Associated Jaw Movement in Man, Arch Oral Biol 22:25-32.[CrossRef][Medline]
[Order article via Infotrieve]
- Hiiemae, K.M. (1978): Mammalian Mastication: A Review of the Activity of the Jaw Muscles and the Movements They Produce in Chewing. In: Development, Function and Evolution of Teeth, Butler, P.M. and Josey, K.A., Eds., London: Academic Press, pp.359-398.
- Jankelson, B.; Swain, C.W.; Crane, P.F.; and Radke, J.C. (1975): Kinesiographic Instrumentation: A New Technology, JADA 90:834-839.
- Jemt, T.; Karlsson, S.; and Hedegard, B. (1979): Mandibular Movements of Young Adults Recorded by Intraorally Placed Light-emitting Diodes, J Prosthet Dent 42:669-673.[CrossRef][Medline]
[Order article via Infotrieve]
- Rugh, J.D. (1972): Variation in Human Masticatory Behaviour under Temporal Constraints, J Comp Physiol Psychol 80:169-174.[CrossRef][Medline]
[Order article via Infotrieve]
- Thexton, A.J.; Hiiemae, K.M.; and Crompton, A.W. (1980): Food Consistency and Bite Size as Regulators of Jaw Movement during Feeding in the Cat, J Neurophysiol 44:456-474.[Free Full Text]
Journal of Dental Research, Vol. 63, No. 11,
1310-1314 (1984)
DOI: 10.1177/00220345840630111201
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