Variation in Daily Masticatory Muscle Activity in the Rabbit

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 mass...

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Bibliographic Details
Published in:Journal of dental research 2004-01, Vol.83 (1), p.55-59
Main Authors: Langenbach, G.E.J., van Wessel, T., Brugman, P., van Eijden, T.M.G.J.
Format: Article
Language:English
Subjects:
Analysis of Variance
Animals
Circadian Rhythm - physiology
Dentistry
Drinking - physiology
Electrodes, Implanted
Electromyography
Evoked Potentials - physiology
Male
Masseter Muscle - physiology
Mastication - physiology
Matched-Pair Analysis
Muscle Contraction - physiology
Rabbits
Signal Processing, Computer-Assisted
Telemetry - instrumentation
Time Factors
Videotape Recording
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Summary: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.
ISSN:0022-0345
1544-0591
DOI:10.1177/154405910408300111