Analysis of brain and muscle activity during low-level tooth clenching : a feasibility study with a novel biting device

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Analysis of brain and muscle activity during low-level tooth clenching : a feasibility study with a novel biting device

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Publication Article, peer reviewed scientific
Title Analysis of brain and muscle activity during low-level tooth clenching : a feasibility study with a novel biting device
Author(s) Lida, T ; Overgaard, A ; Komiyama, O ; Weibull, A ; Baad-Hansen, Lene ; Kawara, M ; Sundgren, PC ; List, Thomas ; Svensson, Peter
Date 2014
English abstract
In electromyographic (EMG) and functional magnetic resonance imaging (fMRI) studies, muscle and brain activity was compared during low levels of tooth clenching using a novel biting device to control bite force. A total of 21 healthy subjects performed motor tasks, comprising tooth clenching at 5, 10 and 20 N. During all measurements, subjects kept the novel bite device between the anterior teeth during tooth clenching. The EMG study (n = 15) characterised jaw muscle activity for the three motor tasks and demonstrated significant differences in root mean square (RMS) EMG amplitude between 5-, 10- and 20-N tooth clenching (F = 46.21, P < 0.001). There were no differences in variability of muscle activity between the three tooth-clenching levels. In an fMRI pilot study (n = 6), statistical comparisons were used to identify brain regions with significant activation in the subtraction of baseline from 5- or 20-N tooth-clenching activity. 5- and 20-N tooth clenching significantly and bilaterally activated the sensorimotor cortex, supplementary motor area, cerebellum and basal ganglia (P < 0.05, corrected for multiple comparisons). However, activation of each brain region did not differ significantly between two tooth-clenching tasks. Based on these preliminary findings, we propose that the novel biting device may be useful in further fMRI studies on controlled jaw muscle activation patterns in different craniofacial pain conditions. In addition, our fMRI result suggests that there are no significant differences in brain activity within low levels of tooth clenching with controlled force
DOI http://dx.doi.org/10.1111/joor.12128 (link to publisher's fulltext)
Publisher Wiley
Host/Issue Journal of oral rehabilitation;2
Volume 41
ISSN 0305-182X
Pages 93-100
Language eng (iso)
Subject(s) Medicine
Research Subject Categories::ODONTOLOGY
Handle http://hdl.handle.net/2043/18008 (link to this page)

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