EMG spectral characteristics of masticatory muscles and upper trapezius during maximum voluntary teeth clenching

Lodetti, Gianluigi; Mapelli, A; Musto, Federica; Rosati, Riccardo; Sforza, Chiarella

doi:10.1016/j.jelekin.2011.10.008

Cited by 21 publications

(14 citation statements)

References 45 publications

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“…The results are not directly comparable with those from previous investigations, because no force‐controlled studies at maximum grinding‐force and no recordings of the deeper neck muscles are available. However, previous findings of co‐contractions for the SCM, SH and IH complexes, reported for maximum jaw muscle activation, are confirmed by our results. It should be emphasised that the experiment was performed on subjects consciously performing grinding tasks.…”

Section: Discussioncontrasting

confidence: 91%

Co‐contraction behaviour of masticatory and neck muscles during tooth grinding

Giannakopoulos

Schindler

Hellmann

2018

J of Oral Rehabilitation

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The objective of this study was to analyse the co-contraction behaviour of jaw and neck muscles during force-controlled experimental grinding in the supine position. Twelve symptom-free subjects were enrolled in the experimental study. Electromyographic (EMG) activity of semispinalis capitis, splenius capitis and levator scapulae muscles was recorded bilaterally with intramuscular fine-wire electrodes, whereas that of sternocleidomastoideus, infrahyoidal, suprahyoidal, masseter and anterior temporalis muscles were registered with surface electrodes. EMG and force measurements were performed during tasks simulating tooth grinding on custom-made intraoral metal splints. The mean EMG activity normalised by maximum voluntary contraction (% MVC) of each of the neck muscles studied during grinding was analysed and compared with previous data from jaw clenching at identical force (100 N) and (supine) position. The occurrence of low-level, long-lasting tonic activation (LLTA) of motor units was also documented. The mean three-dimensional force vector of the grinding forces was 106 ± 74 N. In the frontal plane, the incline to the midsagittal plane ranged between 10° and 15°. In the midsagittal plane, the incline to the frontal plane was negligibly small. Posterior neck muscle activity during grinding ranged between 4.5% and 12% MVC and during clenching with 100 N between 1.8% and 9.9% MVC. Masticatory muscle activity during grinding ranged between 17% and 21% MVC for contralateral masseter and ipsilateral temporalis and between 4% and 6.5% for ipsilateral masseter and contralateral temporalis. LLTA had an average duration of 195 ± 10 seconds. The findings from this study do not support pathophysiological muscle chain theories postulating simple biomechanical coupling of neck and jaw muscles. Co-contractions of neck and masticatory muscles may instead occur as a result of complex neurophysiological interactions.

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Section: Discussioncontrasting

confidence: 91%

Co‐contraction behaviour of masticatory and neck muscles during tooth grinding

Giannakopoulos

Schindler

Hellmann

2018

J of Oral Rehabilitation

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“…In the amplitude domain, Tartaglia et al (2011Tartaglia et al ( , 2008 used the RMS processing with normalized data; Santana-Mora et al (2014) and Santana-Mora et al (2009) used the integrated processing with non-normalized data. In the frequency domain, Lauriti et al (2013) and Lodetti et al (2012) used the mean and median frequency of the electromyographic signal processed by the Fast Fourier Transformed.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of the surface electromyography RMS processing for the diagnosis of myogenous temporomandibular disorder

Berni

Dibai‐Filho

Pires

et al. 2015

Journal of Electromyography and Kinesiology

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“…In humans, Wang et al (2004) reported increased cervical muscle EMG recorded from sternocleidomastoid muscles following noxious injection into the masseter muscle. Evidence of this inter-relationship is also seen by increased activation of both anterior and posterior superficial, and deep cervical muscles during maximal and submaximal clenching (Lodetti et al, 2012;Hellmann et al, 2012;Giannakopoulos et al, 2013a;2013b). Based on this evidence, reduction in upper cervical mobility may be explained by activation of masticatory (Torisu et al, 2007;Manfredini et al, 2013) as well as cervical muscles during conscious teeth contact (Giannakopoulos et al, 2013b).…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 96%