# Properties of tonic episodes of masseter muscle activity during waking hours and sleep in subjects with and without history of orofacial pain
> Mude A.H.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_85032947871
Jurnal / Konferensi: Journal of Prosthodontic Research
Tahun terbit: 2018
DOI: https://doi.org/10.1016/j.jpor.2017.09.003
ISSN: 18831958
Kuartil SJR: Q1
Citations: 22

## Authors
- Mude A.H.

## Abstract
PURPOSE: To provide a scientific data related to the tonic activity of masseter muscle in subjects with and without history of orofacial pain during their normal daily life. METHODS: Thirty-three subjects were divided into two groups, a pain history group (PHG) and a non-pain history group (non-PHG), based on their responses to the Research Diagnostic Criteria for Temporomandibular Disorders questionnaire. After excluding four subjects with incomplete recordings, full-day masseter muscle surface EMGs of 29 subjects (10 men, 19 women; mean age 24.1 years) were analyzed. Tonic episode (TE) was defined as continuous EMG activity with a duration at least 2s with intensities above twice the baseline noise level. TEs were classified into 6 strength categories (<7.5%, 7.5-10%, 10-15%, 15-25%, 25-40% and >40% of the maximum voluntary clenching (MVC)). The mean duration of activity observed in the non-PHG+2 SD was adopted as a cutoff for identifying sustained TE. RESULTS: During waking hours, the incidence of sustained TEs was significantly higher in the PHG than in the non-PHG (p<0.05). The incidence and total duration of sustained TEs were significantly higher in the PHG than in the non-PHG at intensities of 7.5-10% MVC, 10-15% MVC, and 15-25% MVC (p<0.05). No significant difference was observed during sleep. CONCLUSIONS: Within the limitations of this study, it would be concluded that sustained TEs may have a correlation with orofacial pain and the intensity range of 7.5-25% MVC would be an important range for future clenching studies.

## Keywords
- Tonic (physiology)
- Orofacial pain
- Masseter muscle
- Sleep Bruxism
- Medicine
- Anesthesia
- Sleep (system call)
- Electromyography
- Dentistry
- Psychology
- Physical medicine and rehabilitation
- Physical therapy
- Internal medicine
- Computer science
- Operating system

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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