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

Iida, T.; Overgaard, Angelica LU ; Komiyama, O.; Weibull, Andreas LU ; Baad-Hansen, L.; Kawara, M.; Sundgren, Pia LU ; List, T. and Svensson, P. (2014) In Journal of Oral Rehabilitation 41(2). p.93-100
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 20N. 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... (More)
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 20N. 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
brain activity, bruxism, functional magnetic resonance imaging, tooth, clenching
in
Journal of Oral Rehabilitation
volume
41
issue
2
pages
93 - 100
publisher
Wiley-Blackwell
external identifiers
  • wos:000329945800003
  • scopus:84892895650
ISSN
0305-182X
DOI
10.1111/joor.12128
language
English
LU publication?
yes
id
a2c749db-f86c-4945-85b8-ba7df49d0b39 (old id 4318935)
date added to LUP
2014-03-03 07:59:44
date last changed
2017-08-20 03:55:48
@article{a2c749db-f86c-4945-85b8-ba7df49d0b39,
  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 20N. 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&lt;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&lt;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.},
  author       = {Iida, T. and Overgaard, Angelica and Komiyama, O. and Weibull, Andreas and Baad-Hansen, L. and Kawara, M. and Sundgren, Pia and List, T. and Svensson, P.},
  issn         = {0305-182X},
  keyword      = {brain activity,bruxism,functional magnetic resonance imaging,tooth,clenching},
  language     = {eng},
  number       = {2},
  pages        = {93--100},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Oral Rehabilitation},
  title        = {Analysis of brain and muscle activity during low-level tooth clenching - a feasibility study with a novel biting device},
  url          = {http://dx.doi.org/10.1111/joor.12128},
  volume       = {41},
  year         = {2014},
}