• Archives of oral biology · Nov 2015

    Effect of a repeated jaw motor task on masseter muscle performance.

    • Takashi Iida, Osamu Komiyama, Hisae Honki, Yoshihiro Komoda, Lene Baad-Hansen, Misao Kawara, and Peter Svensson.
    • Department of Oral Function and Rehabilitation, Nihon University School of Dentistry at Matsudo, Japan; Section of Clinical Oral Physiology, Department of Dentistry, Aarhus University, Denmark. Electronic address: iida.takashi96@nihon-u.ac.jp.
    • Arch. Oral Biol. 2015 Nov 1; 60 (11): 1625-31.

    ObjectiveThe aim of this study was to investigate the effects of 5-days repeated jaw-motor tasks on masseter muscle accuracy performance.DesignSixteen healthy participants performed a tooth-clenching task (TCT) of 58-minutes on five consecutive days. During measurements, electromyography (EMG) of both masseter muscles was recorded. Each day, the 100% maximum voluntary contraction (MVC) level was determined before the TCT. In the first and third TCT series, participants were instructed to target force levels without visual feedback. During the second TCT series, visual feedback on muscle activity level was displayed. One series consisted of three force levels (10%, 20%, and 40% MVC). In the series, participants alternated between a 30-s rest-block and a 30-s task-block for 360 s. In the task-block, participants alternated between a 5-s rest-block and a 5-s task-block. EMG activity during epochs of 5-s was quantified by calculation of the root-mean-square (RMS) values. To evaluate the accuracy of the performance, the coefficient of determination (CD) of the target force level-EMG curve was calculated from all series.ResultsNo significant day-to-day differences in EMG RMS amplitudes were observed during MVC. CDs differed significantly between the five days (P<0.001). CDs in the first series on day 1 were significantly lower than CDs in the first series on days 4 and 5 (P<0.05).ConclusionsThe findings suggest that a rigorous training paradigm may improve the performance of masseter muscles in terms of accuracy but not MVC. This might have implications for understanding the rehabilitation of patients with functional disorders in the stomatognathic system.Copyright © 2015 Elsevier Ltd. All rights reserved.

      Pubmed     Full text   Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…