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

Headache
Tomoko IkomaP Svensson

Abstract

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. 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. 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....Continue Reading

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Citations

Nov 30, 2018·Clinical Oral Investigations·Carlos Eduardo FassicolloCláudia Maria de Felício
Jul 1, 2021·Journal of Oral Rehabilitation·Simple Futarmal KothariPeter Svensson

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