The daily use of masticatory muscles remains largely unclear, since continuous recordings were limited in space and time. This study’s purpose was to use radio-telemetry to examine daily muscle use and its inter- and intra-individual variations. A telemetric device was implanted into the rabbit masseter, and the transmitted signals were digitally stored for 7 days. Muscle use was analyzed by calculation of the total time each muscle was activated above 5, 20, and 50% of the day’s peak activity. Rabbits (n = 6) spent only 2% of the time chewing. Muscles were activated up to 20% of the total time at levels exceeding 5% of peak activity, and only about 0.5% of the time in forceful behaviors utilizing 50% of maximum contraction. It can be concluded that daily muscle use remained constant during succeeding days, but differed significantly among muscle regions and individuals.
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References
1.
Blanksma NG, Van Eijden TM, Weijs WA (1992). Electromyographic heterogeneity in the human masseter muscle. J Dent Res71:47–52.
2.
Blanksma NG, van Eijden TM, van Ruijven LJ, Weijs WA (1997). Electromyographic heterogeneity in the human temporalis and masseter muscles during dynamic tasks guided by visual feedback. J Dent Res76:542–551.
3.
Bredman JJ, Weijs WA, Moorman AF, Brugman P (1990). Histochemical and functional fibre typing of the rabbit masseter muscle. J Anat168:31–47.
4.
Bredman JJ, Weijs WA, Korfage HA, Brugman P, Moorman AF (1992). Myosin heavy chain expression in rabbit masseter muscle during postnatal development. J Anat180:263–274.
5.
Eason JM, Schwartz G, Shirley KA, English AW (2000). Investigation of sexual dimorphism in the rabbit masseter muscle showing different effects of androgen deprivation in adult and young adult animals. Arch Oral Biol45:683–690.
6.
English AW, Eason J, Pol M, Schwartz G, Shirley A (1998). Different phenotypes among slow/beta myosin heavy chain-containing fibres of rabbit masseter muscle: a novel type of diversity in adult muscle. J Muscle Res Cell Motil19:525–535.
7.
English AW, Eason J, Schwartz G, Shirley A, Carrasco DI (1999). Sexual dimorphism in the rabbit masseter muscle: myosin heavy chain composition of neuromuscular compartments. Cells Tissues Organs164:179–191.
8.
Henneman E (1981). Recruitment of motoneurones: the size principle. Prog Clin Neurophysiol9:26–60.
9.
Hensbergen E, Kernell D (1997). Daily durations of spontaneous activity in cat’s ankle muscles. Exp Brain Res115:325–332.
10.
Hensbergen E, Kernell D (1998). Circadian and individual variations in duration of spontaneous activity among ankle muscles of the cat. Muscle Nerve21:345–351.
11.
Hinch SG, Standen EM, Healey MC, Farrell AP (2002). Swimming patterns and behaviour of upriver-migrating adult pink (Oncorhynchus gorbuscha) and sockeye (O. nerka) salmon as assessed by EMG telemetry in the Fraser River, British Columbia, Canada. Hydrobiology483:147–160.
12.
Hodgson JA, Wichayanuparp S, Recktenwald MR, Roy RR, McCall G, Day MK, et al. (2001). Circadian force and EMG activity in hindlimb muscles of rhesus monkeys. J Neurophysiol86:1430–1444.
13.
Kato T, Montplaisir JY, Guitard F, Sessle BJ, Lund JP, Lavigne GJ (2003). Evidence that experimentally induced sleep bruxism is a consequence of transient arousal. J Dent Res82:284–288.
14.
Kernell D (1992). Organized variability in the neuromuscular system: a survey of task-related adaptations. Arch Ital Biol130:19–66.
15.
Langenbach GE, Hannam AG (1999). The role of passive muscle tensions in a three-dimensional dynamic model of the human jaw. Arch Oral Biol44:557–573.
16.
Langenbach GEJ, van Eijden TMGJ (2001). Mammalian feeding motor patterns. Am Zool41:1338–1351.
17.
Langenbach GE, Brugman P, Weijs WA (1992). Preweaning feeding mechanisms in the rabbit. J Dev Physiol18:253–261.
18.
Langenbach GE, van Ruijven LJ, van Eijden TM (2002). A telemetry system to chronically record muscle activity in middle-sized animals. J Neurosci Methods114:197–203.
19.
McMillan AS, Hannam AG (1992). Task-related behavior of motor units in different regions of the human masseter muscle. Arch Oral Biol37:849–857.
20.
Miyamoto K, Yamada K, Ishizuka Y, Morimoto N, Tanne K (1996). Masseter muscle activity during the whole day in young adults. Am J Orthod Dentofacial Orthop110:394–398.
21.
Miyamoto K, Ishizuka Y, Ueda HM, Saifuddin M, Shikata N, Tanne K (1999). Masseter muscle activity during the whole day in children and young adults. J Oral Rehabil26:858–864.
22.
Nuijens FW, Snelderwaard PC, Bout RG (1997). An electromyographic technique for small animals. J Neurosci Methods76:71–73.
23.
Pette D, Vrbová G (1999). What does chronic electrical stimulation teach us about muscle plasticity? Muscle Nerve22:666–677.
24.
Solberg WK, Clark GT, Rugh JD (1975). Nocturnal electromyographic evaluation of bruxism patients undergoing short term splint therapy. J Oral Rehabil2:215–223.
25.
Weijs WA (1994). Evolutionary approach of masticatory patterns in mammals. Adv Comp Environ Physiol18:281–320.
26.
Weijs WA, Dantuma R (1981). Functional anatomy of the masticatory apparatus in the rabbit (Oryctolagus cuniculus L.). Neth J Zool31:99–147.
27.
Yemm R (1976). The role of tissue elasticity in the control of mandibular resting posture. In: Mastication. Anderson DJ, Matthews B, editors. Bristol: John Wright, pp. 81–89.
