scholarly journals Electromyographic Patterns of Masticatory Muscles in Relation to Active Myofascial Trigger Points of the Upper Trapezius and Temporomandibular Disorders

Diagnostics ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 580
Author(s):  
Grzegorz Zieliński ◽  
Aleksandra Byś ◽  
Jacek Szkutnik ◽  
Piotr Majcher ◽  
Michał Ginszt
Keyword(s):  
Diagnostic Criteria ◽  
Temporomandibular Disorders ◽  
Masseter Muscle ◽  
Mouth Opening ◽  
Trigger Points ◽  
Masticatory Muscles ◽  
Healthy Adults ◽  
Bioelectric Activity ◽  
Myofascial Trigger Points ◽  
Upper Trapezius

The presented study aimed to analyze and compare the electromyographic patterns of masticatory muscles in subjects with active myofascial trigger points (MTrPs) within upper trapezius, patients with temporomandibular disorders (TMDs) and healthy adults. Based on the diagnostic criteria of MTrPs according to Travell & Simons and the Research Diagnostic Criteria for Temporomandibular Disorders, 167 people were qualified for the study. Subjects were divided into 3 groups: with active MTrPs in the upper trapezius, with diagnosed temporomandibular disorders (TMDs) and healthy adults. Measurements of the bioelectric activity of the temporalis anterior (TA) and masseter muscle (MM) were carried out using the BioEMG III ™. Based on statistical analysis, significantly lower values of TA resting activity were observed among controls in comparison to MTrPs (1.49 μV vs. 2.81 μV, p = 0.00) and TMDs (1.49 μV vs. 2.97 μV, p = 0.01). The POC index values at rest differed significantly between MTrPs and TMDs (86.61% vs. 105%, p = 0.04). Controls presented different electromyographic patterns within AcI in comparison to both MTrPs (4.90 vs. −15.51, p = 0.00) and TMDs (4.90 vs. −16.49, p = 0.00). During clenching, the difference between MTrPs and TMDs was observed within MVC TA (91.82% vs. 116.98%, p = 0.02). TMDs showed differences within AcI in comparison to both MTrPs group (−42.52 vs. 20.42, p = 0.01) and controls (−42.52 vs. 3.07, p = 0.00). During maximum mouth opening, differences between MTrPs and TMDs were observed within the bioelectric activity of masseter muscle (16.45 μV vs. 10.73 μV, p = 0.01), AsI MM (0.67 vs. 11.12, p = 0.04) and AcI (13.04 vs. −3.89, p = 0.01). Both the presence of MTrPs in the upper trapezius and TMDs are related to changes in electromyographic patterns of masticatory muscles.

scholarly journals Acute Effect of the Compression Technique on the Electromyographic Activity of the Masticatory Muscles and Mouth Opening in Subjects with Active Myofascial Trigger Points

2020 ◽  
Vol 10 (21) ◽  
pp. 7750 ◽  
Author(s):  
Michał Ginszt ◽  
Grzegorz Zieliński ◽  
Marcin Berger ◽  
Jacek Szkutnik ◽  
Magdalena Bakalczuk ◽  
...  
Keyword(s):  
Mouth Opening ◽  
Trigger Points ◽  
Acute Effect ◽  
Masticatory Muscles ◽  
Study Group ◽  
Electromyographic Activity ◽  
Compression Technique ◽  
Myofascial Trigger Points ◽  
Stomatognathic System ◽  
Before And After

Active myofascial trigger points (MTrPs) in masticatory muscles are associated with a reduced range of motion and muscle weakness within the stomatognathic system. However, it is hard to identify the most effective treatment technique for disorders associated with MTrPs. The objective of this study was to analyze the acute effect of the compression technique (CT) on active maximal mouth opening (MMO) and electromyographic activity of the masseter (MM) and temporalis anterior (TA) muscles in subjects with active myofascial trigger points in the MM muscles. The study group comprised 26 women (mean age 22 ± 2) with bilateral active myofascial trigger points (MTrPs) in the MM. The control group comprised 26 healthy women (mean age 22 ± 1) without the presence of MTrPs in the MM. Masticatory muscle activity was recorded in two conditions (during resting mandibular position and maximum voluntary clenching) before and after the application of the CT to the MTrPs in MM. After the CT application, a significant decrease in resting activity (3.09 μV vs. 2.37 μV, p = 0.006) and a significant increase in clenching activity (110.20 μV vs. 139.06 μV, p = 0.014) within the MM muscles were observed in the study group, which was not observed within TA muscles. Controls showed significantly higher active MMO values compared to the study group before CT (50.42 mm vs. 46.31 mm, p = 0.024). The differences between the study group after CT and controls, as well as among the study group before and after CT did not reach the assumed level of significance in terms of active MMO. The compression technique appears to be effective in the improvement of the active maximal mouth opening and gives significant acute effects on bioelectric masticatory muscle activity. Therefore, CT seems to be effective in MTrPs rehabilitation within the stomatognathic system.

Thermal Evaluation of Myogenous Temporomandibular Disorders and Myofascial Trigger Points in the Masticatory Muscles

2017 ◽  
pp. 329-350
Author(s):  
Denise Sabbagh Haddad ◽  
Marcos Leal Brioschi ◽  
Emiko Saito Arita
Keyword(s):  
Temporomandibular Disorders ◽  
Infrared Imaging ◽  
Trigger Points ◽  
Masticatory Muscles ◽  
Imaging Method ◽  
Myofascial Trigger Points ◽  
Functional Changes ◽  
Cutaneous Temperature ◽  
Vasomotor Activity ◽  
Temperature Levels

It is known that the myofascial trigger points (MTP) and myogenous temporomandibular disorders (TMDs) cause regional sympathetic hyperactivity in local temperature due to the cutaneous vasomotor activity and, for detection of functional changes, thermography is used as a complementary diagnostic imaging method. This chapter intends to study two masticatory muscles, masseter and anterior temporalis, in measurement of the cutaneous temperature of volunteers with and without myogenous TMD and MTP. Results: The temperature levels measured at both muscles regions in myogenous TMD volunteers were significantly lower than those measured in controls. Infrared imaging indicated differences between referred and local pain in MTPs of 0.5ºC. Conclusions: Infrared imaging measurements seem to indicate that it can be used as an aid in complimentary diagnosing of TMDs and MTPs in masticatory muscles.

Changes in active mouth opening following a single treatment of latent myofascial trigger points in the masseter muscle involving post-isometric relaxation or strain/counterstrain

2006 ◽  
Vol 10 (3) ◽  
pp. 197-205 ◽  
Author(s):  
Cleofás Rodríguez Blanco ◽  
César Fernández de las Peñas ◽  
Juan Elicio Hernández Xumet ◽  
Carolina Peña Algaba ◽  
Manual Fernández Rabadán ◽  
...  
Keyword(s):  
Masseter Muscle ◽  
Mouth Opening ◽  
Trigger Points ◽  
Single Treatment ◽  
Myofascial Trigger Points

Thermal Evaluation of Myogenous Temporomandibular Disorders and Myofascial Trigger Points in the Masticatory Muscles

2017 ◽  
pp. 119-140
Author(s):  
Denise Sabbagh Haddad ◽  
Marcos Leal Brioschi ◽  
Emiko Saito Arita
Keyword(s):  
Temporomandibular Disorders ◽  
Infrared Imaging ◽  
Trigger Points ◽  
Masticatory Muscles ◽  
Imaging Method ◽  
Myofascial Trigger Points ◽  
Functional Changes ◽  
Cutaneous Temperature ◽  
Vasomotor Activity ◽  
Temperature Levels

It is known that the myofascial trigger points (MTP) and myogenous temporomandibular disorders (TMDs) cause regional sympathetic hyperactivity in local temperature due to the cutaneous vasomotor activity and, for detection of functional changes, thermography is used as an complementary diagnostic imaging method. This chapter intends to study two masticatory muscles, masseter and anterior temporalis, in measurement of the cutaneous temperature of volunteers with and without myogenous TMD and MTP. Results: The temperature levels measured at both muscles regions in myogenous TMD volunteers were significantly lower than those measured in controls. Infrared imaging indicated differences between referred and local pain in MTPs of 0.5ºC. Conclusions: Infrared imaging measurements seem to indicate that it can be used as an aid in complimentary diagnosing of TMDs and MTPs in masticatory muscles.

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