Changes in jaw and neck muscle coactivation and coordination in patients with chronic painful TMD disk displacement with reduction during chewing

Fassicollo, Carlos Eduardo; Garcia, Doroti de Oliveira; Machado, Bárbara Cristina Zanandréa; Felício, Cláudia Maria de

doi:10.1016/j.physbeh.2020.113267

Cited by 17 publications

(29 citation statements)

References 32 publications

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“…In a survey of Turkish university students, unilateral chewing was significantly associated with TMD, which disturbed the rhythmic coordination of the jaw and neck muscles during chewing contributing to TMD symptoms [ 31 ]. Interestingly, those participating in the previous study with longer chewing cycles and length had more prevalence of experiencing TMD, which was consistent with the current findings [ 32 ]. It was explained that oral parafunctional habits might cause TMD symptoms due to the overloading of musculoskeletal structures.…”

Section: Discussionsupporting

confidence: 91%

Temporomandibular disorders among medical students in China: prevalence, biological and psychological risk factors

Wu¹,

Huang

Chen³

et al. 2021

BMC Oral Health

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Background The purpose of the present study is to evaluate the prevalence of temporomandibular disorders (TMD) and their associated biological and psychological factors in Chinese university students. Methods A total of 754 students were included from Zunyi Medical University, each participant completed questionnaires and clinical examinations according to the Diagnostic Criteria for Temporomandibular Disorders. Results The overall prevalence of TMD was 31.7% among medical students. Subjects with TMD had a high prevalence of bruxism, empty chewing, unilateral chewing, chewing gum, anterior teeth overbite, anterior teeth overjet, depression, anxiety, and sleep disturbance. Moreover, sleep bruxism, empty chewing, unilateral chewing, anterior teeth overbite, depression, and anxiety were the strongest risk factors for TMD. Conclusions Individuals with TMD have a high prevalence of psychological distress and oral parafunctional habits. Except for the psychological factors associated with TMD, bruxism, abnormal chewing, and malocclusion also shared similar risks for TMD.

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Section: Discussionsupporting

confidence: 91%

Temporomandibular disorders among medical students in China: prevalence, biological and psychological risk factors

Wu¹,

Huang

Chen³

et al. 2021

BMC Oral Health

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“…Moreover, we used activity and asymmetry indices to standardize and compare sEMG results. In addition, both normalized sEMG values and sEMG RMS data were used to compare sEMG results [40][41][42][43].…”

Section: Discussionmentioning

confidence: 99%

The Relationship between Stress and Masticatory Muscle Activity in Female Students

Zieliński

Ginszt

Zawadka

et al. 2021

JCM

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The aim of the study was to analyze the relationship between stress measured by the perceived stress scale (PSS-10) questionnaire and masticatory muscle activity. Experimental design assumed the study of healthy young women without temporomandibular disorders, dividing them into three groups depending on the result of the stress level and then comparing these groups in terms of bioelectrical activity of the masticatory muscles. After the exclusion criteria were applied, 63 female students (mean age: 22.3 ± 2.4 years) from Medical University of Lublin were included in the study. The subjects were then divided into 3 groups: with low (n = 18), medium (n = 18) and high stress level (n = 27), according to PSS-10 results. Resting and functional activity of temporalis anterior (TA) and masseter (MM) muscles were measured by electromyograph BioEMG III. There were statistically significant effects of group on the absolute value of asymmetry index (AsI) of TA and MM during maximum voluntary clenching on dental cotton rollers (both p = 0.02). Post hoc analysis shows that there were statistically significant differences between medium and high stress groups in AsI TA (p = 0.01) and between low and high stress groups in AsI MM (p = 0.02). Perceived stress measured by PSS-10 questionnaire seems to be associated with changes in muscular asymmetry in functional clenching activity.

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“…The sEMG technique has also been studied, but methodological problems tend to compromise its ability to predict and distinguish the TMD patients from the healthy controls. A previous study showed altered coactivation and coordination strategies of the jaw muscles during mastication, resulting in higher relative energy expenditure and impaired differential recruitment [ 22 ]. Another study showed that women with TMD myalgia had greater jaw muscle work than healthy control subjects [ 9 ].…”

Section: Discussionmentioning

confidence: 99%

Masticatory Myoelectric Side Modular Ratio Asymmetry during Maximal Biting in Women with and without Temporomandibular Disorders

et al. 2022

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There is no consensus on the role of electromyographic analysis in detecting and characterizing the asymmetries of jaw muscle excitation in patients with temporomandibular disorders (TMD). To analyze the TMD patients (n = 72) in comparison with the healthy controls (n = 30), the surface electromyography (sEMG) of the temporalis anterior muscle (TA) and masseter muscle (M) was recorded while a maximal biting task was performed. The differences in the asymmetry of the relationship between the masseter muscles were assessed in a module to determine the sensitivity (Sn) of binomial logistic models, based on the dominance of the TA or the M muscle, in accurately predicting the presence of TMD. All assumptions were met, and comparisons between the groups showed significant differences for the TA muscle ratio (p = 0.007), but not for the M muscle ratio (p = 0.13). The left side was predominant over the right side in the TMD group for both the TA (p = 0.02) and M muscles (p = 0.001), while the non-TMD group had a higher frequency of the right side. Binary logistic regression showed a significant model (χ2 = 9.53; p = 0.002) for the TA muscle with Sn = 0.843. The model for the M muscle also showed significance (χ2 = 8.03; p = 0.005) with Sn = 0.837. The TMD patients showed an increased TA muscle ratio and asymmetry of left dominance, compared to the healthy subjects. Both of the binomial logistic models, based on muscle dominance TA or M, were moderately sensitive for predicting the presence of TMD.

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Changes in jaw and neck muscle coactivation and coordination in patients with chronic painful TMD disk displacement with reduction during chewing

Cited by 17 publications

References 32 publications

Temporomandibular disorders among medical students in China: prevalence, biological and psychological risk factors

Temporomandibular disorders among medical students in China: prevalence, biological and psychological risk factors

The Relationship between Stress and Masticatory Muscle Activity in Female Students

Masticatory Myoelectric Side Modular Ratio Asymmetry during Maximal Biting in Women with and without Temporomandibular Disorders

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