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Effects of Low-Intensity Contractions of Different Craniofacial Muscles in Healthy Participants - An Experimental Cross-Over Study

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Title: Effects of Low-Intensity Contractions of Different Craniofacial Muscles in Healthy Participants - An Experimental Cross-Over Study
Authors: Ikoma, Tomoko Browse this author
Bendixen, Karina Haugaard Browse this author
Arima, Taro Browse this author →KAKEN DB
Dawson, Andreas Browse this author
Yamaguchi, Taihiko Browse this author →KAKEN DB
List, Thomas Browse this author
Svensson, Peter Browse this author
Keywords: experimental muscle pain
tooth clenching
orbicularis oculi
orbicularis oris
orofacial pain
Issue Date: Apr-2018
Publisher: John Wiley & Sons
Journal Title: Headache
Volume: 58
Issue: 4
Start Page: 559
End Page: 569
Publisher DOI: 10.1111/head.13280
Abstract: Objective.-Repetitive jaw-muscle activity characterized by clenching or grinding of the teeth and/or by bracing or thrusting of the mandible, ie, bruxism, is traditionally linked to pain and unpleasantness in the active muscles. The aim of this study was to investigate the effects of standardized craniofacial muscle contractions on self-reported symptoms. Methods.-Sixteen healthy volunteers performed six 5-minute bouts of 20% maximal voluntary contraction task of the jaw-closing (Jaw), the orbicularis-oris (O-oris), and the orbicularis-oculi (O-oculi) muscles. Participants rated their perceived pain, unpleasantness, fatigue, and mental stress levels before, during, and after the contraction tasks on 0-10 Numeric Rating Scales (NRS). Each muscle contraction task (= 1 session) was separated by at least 1 week and the order of the sessions was randomized in each subject. Results.-All muscle contraction tasks evoked significant increases in NRS scores of pain (mean +/- SD: Jaw; 3.8 +/- 2.7, O-oris; 1.9 +/- 2.2, O-oculi; 1.4 +/- 1.3, P < .014), unpleasantness (Jaw; 4.1 +/- 2.5, O-oris; 2.1 +/- 1.9, O-oculi; 2.9 +/- 1.8, P<.001), fatigue (Jaw; 5.8 +/- 2.0, O-oris; 3.2 +/- 2.3, O-oculi; 3.6 +/- 1.9, P<.001), and mental stress (Jaw; 4.1 +/- 2.1, O-oris; 2.2 +/- 2.7, O-oculi; 2.9 +/- 2.2, P<.001). The Jaw contractions were associated with higher NRS scores compared with the O-oris and the O-oculi contractions (P<.005) without differences between the O-oris and the O-oculi (P>.063). All symptoms disappeared within 1 day (P>.469). Conclusions.-The results showed that submaximal static contractions of different craniofacial muscle groups could evoke transient, mild to moderate levels of muscle pain and fatigue and increased stress scores. The fatigue resistance may differ between different muscle groups. Further studies are warranted to better understand the contribution of specific craniofacial muscle groups for the characteristic presentation of musculoskeletal pain conditions in the head.
Rights: This is the peer reviewed version of the following article: [Effects of Low‐Intensity Contractions of Different Craniofacial Muscles in Healthy Participants – An Experimental Cross‐Over Study], which has been published in final form at []. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
Appears in Collections:歯学院・歯学研究院 (Graduate School of Dental Medicine / Faculty of Dental Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 有馬 太郎

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