scholarly journals Electromyography as a Means of Assessing Masticatory Muscle Activity in Patients with Pain-Related Temporomandibular Disorders

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Liliana Szyszka-Sommerfeld ◽  
Monika Machoy ◽  
Mariusz Lipski ◽  
Krzysztof Woźniak
Keyword(s):  
Electrical Activity ◽  
Muscle Activity ◽  
Temporomandibular Disorders ◽  
Masseter Muscle ◽  
Mixed Dentition ◽  
Masticatory Muscle ◽  
Temporalis Muscle ◽  
Pain Group ◽  
Axis I ◽  
Masseter Muscles

Aim. The aim of this study was to evaluate masticatory muscle electrical activity in patients with pain-related and pain-free temporomandibular disorders (TMDs) as well as in subjects with no TMD. Methods. Ninety children with mixed dentition were recruited to the study. Of this total, 30 subjects were diagnosed with pain-related TMD (TMD-P), 30 with pain-free TMD (TMD-PF), and 30 without TMD. We used Axis I of the Research Diagnostic Criteria for TMD (RDC/TMD) to assess the presence of TMD in the examined children. The electromyographical (EMG) potentials of the temporalis and masseter muscles were measured with a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) at rest and during maximum voluntary clenching (MVC). Results. An analysis of the EMG recordings showed statistically significant intergroup differences in masticatory muscle electrical activity at rest and during MVC. Significantly higher rest temporalis muscle activity was noted in pain-related TMD subjects compared with that children from the pain-free TMD and non-TMD groups, as well as in TMD-PF children in relation to those without TMD. The EMG potentials of the temporalis muscle during MVC were much lower in patients with TMD-P than in pain-free TMD and non-TMD subjects. Masseter muscle activity at rest in the TMD-pain group was significantly greater, and masseter muscle EMG potentials during clenching were markedly lower than in patients with no TMD diagnosis. Conclusion. The use of electromyography to assess masticatory muscle function revealed alterations in the pattern of temporalis and masseter muscle activity in patients with pain-related TMD compared with the pain-free subjects.

scholarly journals Assessment of Masticatory Muscle Function in Patients with Bilateral Complete Cleft Lip and Palate and Posterior Crossbite by means of Electromyography

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Liliana Szyszka-Sommerfeld ◽  
Agata Budzyńska ◽  
Mariusz Lipski ◽  
Sławomir Kulesza ◽  
Krzysztof Woźniak
Keyword(s):  
Muscle Activity ◽  
Muscle Function ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Emg Activity ◽  
Masticatory Muscle ◽  
Temporalis Muscle ◽  
Posterior Crossbite ◽  
Electrical Potentials ◽  
Masseter Muscles

Aim. The aim of this study was to evaluate the electrical activity of the masticatory muscles in children with a bilateral complete cleft lip and palate (BCCLP) and posterior crossbite as well as in noncleft subjects with no malocclusion. Another purpose of the study was to examine the possible factors associated with this muscle activity. Methods. The study included 52 children with mixed dentition and Class I occlusions (20 patients with nonsyndromic BCCLP and 32 subjects with no clefts). All the cleft patients had posterior crossbite. The surface electromyography (sEMG) was used to identify the electrical potentials of the temporalis and masseter muscles. The electromyographical (EMG) recordings were taken with a DAB-Bluetooth Instrument (zebris Medical GmbH, Germany) at rest and during maximum voluntary clenching (MVC). The relationships between muscle EMG activity and independent variables were identified through multivariate logistic regression analysis. Results. The EMG activity of the temporalis muscles at rest was significantly higher in BCCLP patients with malocclusion in comparison with the noncleft subjects with normal occlusion. During MVC, significantly lower electrical potentials of the temporalis and masseter muscles were observed in cleft patients compared to the noncleft group. The presence of BCCLP, unilateral posterior crossbites, increased vertical overlap, and increased overjet are factors strongly associated with higher temporalis muscle EMG activity at rest. Conclusion. The use of surface electromyography in imaging muscle function showed that children with BCCLP and posterior crossbite exhibited altered masticatory muscle potentials at rest and during clenching. The presence of unilateral posterior crossbites, increased vertical overlap, and increased overjet had a significant impact on temporalis muscle activity in cleft patients. This knowledge is important in the aspect of early and proper diagnosis and orthodontic treatment of malocclusions, thereby achieving correct occlusion and improvement in muscle function.

The immediate effect of masseter trigger points compression on masticatory muscle activity

2017 ◽  
Vol 13 (2) ◽  
pp. 78-88 ◽  
Author(s):  
Michał Ginszt ◽  
Marcin Berger ◽  
Piotr Gawda ◽  
Andrzej Bożyk ◽  
Joanna Gawda ◽  
...  
Keyword(s):  
Electrical Activity ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Trigger Points ◽  
Masticatory Muscle ◽  
Myofascial Trigger Points ◽  
Pain Thresholds ◽  
Pressure Pain ◽  
Pressure Pain Thresholds ◽  
Masticatory Muscle Activity

Masticatory muscle pain (MMP) is the most prevalent source of pain related to temporomandibular disorders. Some authors suggest that MMP may be related to the presence of myofascial trigger points (TrPs). Aim. The aim of the present study was to evaluate the immediate effect of masseter (MM) trigger point compressions technique on masticatory muscle activity and pressure pain thresholds (PPT). Material and methods. The participants were 15 healthy adults (10 women and 5 men; mean age 23.1±3.6). All participants included into the study had unilateral latent trigger points (TrPs) in the masseter muscle. Compression technique (CoT) of the latent TrPs in the masseter muscle was performed by pressing with index finger using constant, calibrated pressure of 2 kg/cm2 on the TrPs for 90 seconds. The electrical activity of the examined muscles and pressure pain thresholds for masseter muscles were recorded prior and after CoT. Results. Mean surface electrical activity of the MM muscle with TrPs and both sides of digastric muscle (DA) during resting mandibular position after CoT was significantly lower than before CoT (mean differences: MM 1=-0.783, p=0.001; DA 1=-0.312, p=0.01; DA 2=-0.229, p=0.025). Mean PPT of the MM muscles with TrPs after CoT was significantly higher comparing to baseline (1.819 vs.1.529 kg, respectively; p=0.001). Conclusions. CoT of the TrPs in masseter muscle reduces masticatory muscles resting activity. The use of CoT applied to the TrPs in masseter muscle increases pain pressure threshold. CoT may be effective in the management of MMP. (Ginszt M, Berger M, Gawda P, Bożyk A, Gawda J, Szkutnik J, Suwała M, Majcher P, Kapelan M. The immediate effect of masseter trigger points compression on masticatory muscle activity. Orthod Forum 2017; 13: 79-88).

scholarly journals Electromyographic Analysis of Masticatory Muscles in Cleft Lip and Palate Children with Pain-Related Temporomandibular Disorders

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Liliana Szyszka-Sommerfeld ◽  
Teresa Matthews-Brzozowska ◽  
Beata Kawala ◽  
Marcin Mikulewicz ◽  
Monika Machoy ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Temporomandibular Disorders ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Maximum Voluntary Contraction ◽  
Masticatory Muscles ◽  
Voluntary Contraction ◽  
Axis I ◽  
Masseter Muscles ◽  
Rest Activity

Aim. The aim of this study was to assess the electrical activity of temporalis and masseter muscles in children with cleft lip and palate (CLP) and pain-related temporomandibular disorders (TMD-P). Methods. The sample consisted of 31 CLP patients with a TMD-P (mean age 9.5 ± 1.8 years) and 32 CLP subjects with no TMD (mean age 9.2 ± 1.7 years). The children were assessed for the presence of temporomandibular disorders (TMD) using Axis I of the Research Diagnostic Criteria for TMD (RDC/TMD). Electromyographical (EMG) recordings were performed using a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany) in the mandibular rest position and during maximum voluntary contraction (MVC). Results. The rest activity of the temporalis and masseter muscles was significantly higher in TMD-P group compared with non-TMD children. A significant decrease in temporalis muscle activity during MVC was observed in TMD-P patients. There was a significant increase in the Asymmetry Index for temporalis and masseter muscle rest activity in the TMD-P group. Conclusion. Cleft children diagnosed with TMD-P have altered masticatory muscle activity, and this can affect their muscle function.

scholarly journals Masseter muscle surface electromyography in college students with a high degree of anxiety and temporomandibular disorder

Revista CEFAC ◽  
2018 ◽  
Vol 20 (1) ◽  
pp. 44-52 ◽  
Author(s):  
Eduarda de Lima Amarante ◽  
Jully Anne Soares de Lima ◽  
Rafael Nóbrega Bandeira ◽  
Ana Paula Arruda de Moura ◽  
Luciane Spinelli de Figueiredo Pessoa ◽  
...  
Keyword(s):  
College Students ◽  
Electrical Activity ◽  
Masseter Muscle ◽  
Speech Therapy ◽  
Temporomandibular Disorder ◽  
P Value ◽  
Voluntary Activity ◽  
Group 2 ◽  
High Degree ◽  
Masseter Muscles

ABSTRACT Objective: to compare the electrical activity of masseter muscles, bilaterally, according to the presence or absence of Temporomandibular Disorder (TMD) in college students with a high degree of anxiety. Methods: the study was conducted with a randomized sample of 31 Speech Therapy students aged between 17 and 32 years; 61.3% (n = 19) were females and 38.7% (n = 12) were males. They were divided into two groups, Group 1 (G1), comprising 11 students with TMD, and Group 2 (G2), composed of 20 students without TMD. The college students answered the State-Trait Anxiety Inventory (STAI) for anxiety investigation, and were evaluated by the protocol Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) for TMD diagnosis. The evaluation of muscular electrical activity took into account the records in the conditions of rest, Sustained Maximum Voluntary Activity (SMVA) and habitual chewing (HC). The data were analyzed using the version 22 IBM Statistical Package for Social Sciences (SPSS) software. The statistical analysis was performed using Student t test to compare means between groups, considering < 0,05 as the significant p-value. Results: college students, of both groups, presented high levels of anxiety traits. Significant statistical differences were observed on the percentage of electrical activity of right masseter muscle in chewing function, as well as muscle fibers recruitment during chewing, which were higher on the group without TMD. Conclusion: college students with TMD and a high degree of anxiety presented lower means of masseter muscle electromyografic activity during chewing, in most conditions assessed, as compared to volunteers without TMD, except for the left masseter muscle in rest and chewing.

Masticatory muscle activity during maximum voluntary clench in different research diagnostic criteria for temporomandibular disorders (RDC/TMD) groups

2008 ◽  
Vol 13 (5) ◽  
pp. 434-440 ◽  
Author(s):  
Gianluca M. Tartaglia ◽  
Marco Antonio Moreira Rodrigues da Silva ◽  
Stefano Bottini ◽  
Chiarella Sforza ◽  
Virgilio F. Ferrario
Keyword(s):  
Diagnostic Criteria ◽  
Muscle Activity ◽  
Temporomandibular Disorders ◽  
Masticatory Muscle ◽  
Masticatory Muscle Activity ◽  
Research Diagnostic Criteria

scholarly journals Functional Changes of Temporomandibular Joint Mechanoreceptors Induced by Reduced Masseter Muscle Activity in Growing Rats

2009 ◽  
Vol 79 (5) ◽  
pp. 978-983 ◽  
Author(s):  
Takayoshi Ishida ◽  
Tadachika Yabushita ◽  
Kunimichi Soma
Keyword(s):  
Temporomandibular Joint ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Growth Period ◽  
Control Group ◽  
Functional Changes ◽  
Male Wistar Rats ◽  
Masseter Muscles ◽  
Experimental Group ◽  
Indirect Stimulation

Abstract Objective: To determine the influence of masseter muscle activity during growth on the functional characteristics of temporomandibular joint (TMJ) mechanoreceptors. Materials and Methods: Sixty-six 3-week-old male Wistar rats were divided into an experimental group, in which the masseter muscles were bilaterally resected at 3 weeks of age, and a control group. Single-unit activities of the TMJ mechanoreceptors were evoked by indirect stimulation of passive jaw movement. Electrophysiologic recordings of TMJ units were made at 5, 7, and 9 weeks of age. Results: During this period, the firing threshold of the TMJ units was significantly lower and the maximum instantaneous frequency of the TMJ units was significantly higher in the experimental group than in the control group. Conclusion: Reduced masseter activity during the growth period alters the response properties of TMJ mechanoreceptors.

The Vestibular System Modulates Masseter Muscle Activity

1993 ◽  
Vol 3 (2) ◽  
pp. 163-171
Author(s):  
E. Tolu ◽  
M. Pugliatti
Keyword(s):  
Vestibular System ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Motor Units ◽  
Electrical Activation ◽  
Evoked Responses ◽  
Unilateral Lesion ◽  
Vestibular Input ◽  
Head Displacement ◽  
Masseter Muscles

The aim of this study was to investigate whether, and in what way, the vestibular input may influence the activity of the masseter muscles. The variations in the spontaneous electrical activity and the evoked responses in the masseter motor units to natural or electrical activation of the vestibular afferents were recorded in anesthetized guinea pigs. The effects of a unilateral lesion of the labyrinth on the firing rate of the masseter motor units were also studied. Results show that: 1) vestibular input elicited an excitatory tonic control on masseter muscle activity; 2) a faster labyrinthine control is driven to the contralateral than the homolateral masseter muscles; 3) vestibular macular input does exert an asymmetrical control on masseteric muscles of both sides, in relation to the head displacement in space. The latencies of responses recorded from the masseter motor units suggest that polysynaptic pathways are involved in connecting the vestibular system to the trigeminal complex. The possible anatomical substrates for this vestibulomasseteric reflex are discussed.

Sign in / Sign up

Export Citation Format

Share Document