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Journal of Dental Research
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Direction of a Bite Force Determines the Pattern of Activity in Jaw-closing Muscles

J. Mao

Department of Oral Biology, Faculty of Dentistry, University of Alberta, Edmonton, Alberta, Canada T6G 2N8

J.W. Osborn

Department of Oral Biology, Faculty of Dentistry, University of Alberta, Edmonton, Alberta, Canada T6G 2N8

Human individuals were hypothesized to use the same pattern of jaw muscle activity to produce the same bite force. To test this hypothesis, we used a 2-mm-thick force transducer to monitor the magnitude and direction of a bite force between a single pair of occluding first molars. Five subjects performed standardized bite force tasks. Six different magnitudes were tested, each in five directions. The surface electromyographic (EMG) activity in the left and right masseter and temporalis muscles was recorded, integrated, and normalized. Ratios of the EMG activity of paired muscles (e.g., the ratio of working temporalis and working masseter) were calculated for each bite force task. Each ratio was roughly constant for each direction of bite force, regardless of its magnitude. In contrast, when the magnitude of bite force was the same but the directions were different, the ratio was not constant. We conclude that the direction of a bite force, not its magnitude, determines the pattern of activity of jaw-closing muscles. The shared patterns of muscle activation may be the result of a subconscious optimization of jaw muscle forces to improve efficiency.

Key Words: 3D • Bite Force • Jaw Muscle • Recruitment • Motor Control

REFERENCES

  • Bakke M., Michler L., Han K., Moller E. (1989). Clinical significance of isometric bite force versus electrical activity in temporal and masseter muscles. Scand J Dent Res 97:539-551.[Medline] [Order article via Infotrieve]
  • Bishop B., Plesh O., McCall WD Jr (1990). Effects of chewing frequency and bolus hardness on human incisor trajectory and masseter muscle activity. Arch Oral Biol 35:311-318.[Medline] [Order article via Infotrieve]
  • Buchanan TS, Almdale DP, Lewis JL, Rymer WZ (1986). Characteristics of synergic relations during isometric contractions of human elbow muscles. J Neurophysiol 56:1225-1241.[Abstract/Free Full Text]
  • Dechow PC, Carlson DS (1986). Occlusal force and craniofacial biomechanics during growth in Rhesus monkeys. Am J Phys Anthropol 83:219-237.
  • Devlin H., Wastell DG (1985). Bite force and masseter muscle electromyographic activity during onset of an isometric clench in man. Arch Oral Biol 30:213-215.[Medline] [Order article via Infotrieve]
  • Diaz-Tay J., Jayasinghe N., Lucas PW, McCallum JC, Jones JT (1991). Association between surface electromyography of human jaw-closing muscle and quantified food breakdown. Arch Oral Biol 36:893-898.[Medline] [Order article via Infotrieve]
  • Eriksson P-O., Thornell L-E (1983). Histochemical and morphological muscle-fibre characteristics of the human masseter, the medial pterygoid and the temporal muscles. Arch Oral Biol 28:781-795.[CrossRef][Medline] [Order article via Infotrieve]
  • Floystrand F., Kleven E., ilo G. ( 1982). A novel miniature bite force recorder and its clinical application. Acta Odontol Scand 40:209-214.[Medline] [Order article via Infotrieve]
  • Georgopoulos AP, Kettner RE, Schwartz AB (1988). Primate motor cortex and free arm movements to visual targets in three-dimensional space. II. Coding of the direction of movement by a neuronal population. J Neurosci 8:2928-2937.[Abstract]
  • Georgopoulos AP, Schwartz AB, Kettner RE (1986). Neuronal population coding of movement direction. Science 233:1416-1419.[Abstract/Free Full Text]
  • Graf H., Grassl H., Aebfrhard HJ (1974). A method for measurement of occlusal forces in three directions. Helv Odontol Acta 18:7-11.
  • Griffin CJ, Munro RR (1969). Electromyography of the jaw-closing muscles in the open-close-clench cycle in man. Arch Oral Biol 14:141-149.[Medline] [Order article via Infotrieve]
  • Hagberg C., Agerberg G., Hagberg M. (1985). Regression analysis of electromyographic activity of masticatory muscles versus bite force. Scand J Dent Res 93:539-545.[Medline] [Order article via Infotrieve]
  • Haraldson T., Carlsson GE, Dahlstrom L., Jansson T. (1985). Relationship between myoelectric activity in masticatory muscles and bite force. Scand J Dent Res 93:539-545.[Medline] [Order article via Infotrieve]
  • Helkimo E., Carlsson GE, Carmeli Y. (1975). Bite force in patients with functional disturbances of the masticatory system. J Oral Rehabil 2:397-406.[CrossRef]
  • Herring SW (1976). The dynamics of mastication in pigs. Arch Oral Biol 21:473-480.[Medline] [Order article via Infotrieve]
  • Herring SW, Grimm AF, Grimm BR (1979). Functional heterogeneity in a multipinnate muscle. Am J Anat 154:563-576.[CrossRef][Medline] [Order article via Infotrieve]
  • Hylander WL (1978). Incisal bite force direction in humans and the functional significance of mammalian mandibular translation. Am J Phys Anthropol 48:1-8.[Medline] [Order article via Infotrieve]
  • Hylander WL, Johnson KR (1985). Temporalis and masseter muscle function during incision in macaques and humans. Int J Primatol 6:289-322.
  • Hylander WL, Johnson KR, Crompton AW (1987). Loading patterns and jaw movements during mastication in Macaca fascicularis: a bone-strain, electromyographic, and cineradiographic analysis. Am J Phys Anthropol 72:287-314.[CrossRef][Medline] [Order article via Infotrieve]
  • Jacobs R., van Ingen Schenau GJ (1992). Intermuscular coordination in a sprint push-off. J Biomechan 25:953-965.[Medline] [Order article via Infotrieve]
  • Kalaska JF, Cohen DAD, Hyde ML, Prud'homme M. (1989). A comparison of movement direction-related versus load direction-related activity in primate motor cortex, using a two-dimensional reaching task. J Neurosci 9:2080-2102.[Abstract]
  • Keshner EA, Campbell D., Katz RT, Peterson BW (1989). Neck muscle activation patterns in humans during isometric head stabilization. Exp Brain Res 75:335-344.[Medline] [Order article via Infotrieve]
  • Koolstra JH, van Eijden Tmgj, Weijs WA, Naeije M. (1988). A three-dimensional mathematical model of the human masticatory system predicting maximum possible bite forces. J Biomech 21:563-576.[CrossRef][Medline] [Order article via Infotrieve]
  • Lavender SA, Tsuang YH, Andersson GBJ, Hafezi A., Shin CC ( 1992). Trunk muscle cocontraction: the effects of moment direction moment magnitude. J Orthop Res 10:691-700.[Medline] [Order article via Infotrieve]
  • Lindauer SJ, Gay T., Rendell J. (1991). Electromyographic-force characteristics in the assessment of oral function. J Dent Res 70:1417-1421.
  • Linderholm H., Wennstrom A. (1970). Isometric bite force and its relation to general muscle force and body build. Acta Odontol Scand 28:679-689.[Medline] [Order article via Infotrieve]
  • Luschei ES, Goodwin GM (1974). Patterns of mandibular movement and jaw muscle activity during mastication in the monkey. J Neurophysiol 37:954-966.[Free Full Text]
  • MacDonald JWC, Hannam AG (1984). Relationship between occlusal contacts and jaw-closing muscle activity during tooth clenching: Part I. J Prosthet Dent 52:718-728.
  • Mackenna BR, Turker KS (1983). Jaw separation and maximum incising force. J Prosthet Dent 49:726-730.[CrossRef][Medline] [Order article via Infotrieve]
  • Macpherson JM (1988). Strategies that simplify the control of quadrupedal stance. II. Electromyographic activity. J Neurophysiol 60:218-231.[Abstract/Free Full Text]
  • Manns A., Miralles R., Palazzi C. (1979). EMG, bite force, and elongation of the masseter muscle under isometric voluntary contractions and variations of vertical dimensions. J Prosthet Dent 42:674-682.[CrossRef][Medline] [Order article via Infotrieve]
  • Mao J., Stein RB, Osborn JW (1992). The size and distribution of fiber types in jaw muscles: a review. J Craniomandib Disord Fac Oral Pain 6:192-201.[Medline] [Order article via Infotrieve]
  • Osborn JW, Baragar FA (1985). Predicted pattern of human muscle activity during clenching derived from a computer assisted model: Symmetric vertical bite forces. J Biomechan 18:599-612.[CrossRef][Medline] [Order article via Infotrieve]
  • Osborn JW, Baragar FA (1992). Predicted and observed shapes of human mandibular condyles. J Biomechan 25:967-974.[Medline] [Order article via Infotrieve]
  • Osborn JW, Mao J. (1993). A thin bite-force transducer with three-dimensional capabilities reveals a change in bite-force direction during jaw-muscle endurance tests. Arch Oral Biol 38:139-144.[Medline] [Order article via Infotrieve]
  • Pruim GJ, ten Bosch JJ, de Jongh HJ (1978). Jaw muscle EMG-activity and static loading of the mandible. J Biomechan 11:389-395.[CrossRef][Medline] [Order article via Infotrieve]
  • Ringqvist M. (1973). Fibre sizes of human masseter muscle in relation to bite force. J Neurol Sci 19:297-305.[Medline] [Order article via Infotrieve]
  • Rosenbaum DA (1980). Human movement initiation: Specification of arm, direction, and extent. J Exp Psychol: General 109:444-474.[CrossRef][Medline] [Order article via Infotrieve]
  • Schwartz G., Enomoto S., Valiquette C., Lund JP ( 1989). Mastication in the rabbit: a description of movement and muscle activity. J Neurophysiol 62:273-287.[Abstract/Free Full Text]
  • Soechting JF, Terzuolo CA (1990). Sensorimotor transformations and kinematics of arm movements in three-dimensional space. In: Attention and performance XIII. Jeannerod M, editor. Hillsdale: Erlbaum, pp. 479-494.
  • Stalberg E., Eriksson P-O., Antoni L., Thornell L-E (1986). Electrophysiological study of size and fibre distribution of motor units in the human masseter and temporal muscles. Arch Oral Biol 31:521-527.[Medline] [Order article via Infotrieve]
  • Stegenga B., Broekhuijsen ML, van Willingen JD (1990). Clinical significance of bite force reproduction ability. J Craniomandib Disord Fac Oral Pain 4:6-16.[Medline] [Order article via Infotrieve]
  • Stohler CS (1986). A comparative electromyographic and kinesiographic study of deliberate and habitual mastication in man. Arch Oral Biol 31:669-678.[Medline] [Order article via Infotrieve]
  • Van Eijden,TMGJ Brugman P., Weijs WA, Oosting J. (1990). Coactivation of jaw muscles: recruitment order and level as a function of bite force direction and magnitude. J Biomechan 23:475-485.[CrossRef][Medline] [Order article via Infotrieve]
  • Walker A. (1978). Functional anatomy of oral tissues: mastication and deglutition. In: Textbook of oral biology. Shaw JH, Sweeney DA, Cappuccino CC, Meller SM, editors. Philadelphia: Saunders, pp. 277-296.
  • Weijs WA, Dantuma R. (1975). Electromyography and mechanics of mastication in the albino rat. J Morphol 146:1-34.[CrossRef][Medline] [Order article via Infotrieve]

Journal of Dental Research, Vol. 73, No. 5, 1112-1120 (1994)
DOI: 10.1177/00220345940730051401
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