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 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.

scholarly journals The Electrical Activity of the Temporal and Masseter Muscles in Patients with TMD and Unilateral Posterior Crossbite

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Krzysztof Woźniak ◽  
Liliana Szyszka-Sommerfeld ◽  
Damian Lichota
Keyword(s):  
Electrical Activity ◽  
Muscle Activity ◽  
Maximum Voluntary Contraction ◽  
Voluntary Contraction ◽  
Asymmetry Index ◽  
Subjective Symptoms ◽  
Posterior Crossbite ◽  
Rest Position ◽  
Torque Coefficient ◽  
Masseter Muscles

The aim of this study was to assess the influence of unilateral posterior crossbite on the electrical activity of the temporal and masseter muscles in patients with subjective symptoms of temporomandibular dysfunctions (TMD). The sample consisted of 50 patients (22 female and 28 male) aged 18.4 to 26.3 years (mean 20.84, SD 1.14) with subjective symptoms of TMD and unilateral posterior crossbite malocclusion and 100 patients without subjective symptoms of TMD and malocclusion (54 female and 46 male) aged between 18.4 and 28.7 years (mean 21.42, SD 1.06). The anamnestic interviews were conducted according to a three-point anamnestic index of temporomandibular dysfunction (Ai). Electromyographical (EMG) recordings were performed using a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany). Recordings were carried out in the mandibular rest position and during maximum voluntary contraction (MVC). Analysis of the results of the EMG recordings confirmed the influence of unilateral posterior crossbite on variations in spontaneous muscle activity in the mandibular rest position and maximum voluntary contraction. In addition, there was a significant increase in the Asymmetry Index (As) and Torque Coefficient (Tc), responsible for a laterodeviating effect on the mandible caused by unbalanced right and left masseter and temporal muscles.

scholarly journals Effects of Therapeutic and Aerobic Exercise Programs on Pain, Neuromuscular Activation, and Bite Force in Patients with Temporomandibular Disorders

2021 ◽  
Vol 11 (11) ◽  
pp. 1170
Author(s):  
Paula Manuela Mendes Moleirinho-Alves ◽  
Pedro Miguel Teixeira Cravas Cebola ◽  
Paulo Duarte Guia dos Santos ◽  
José Pedro Correia ◽  
Catarina Godinho ◽  
...  
Keyword(s):  
Aerobic Exercise ◽  
Temporomandibular Disorders ◽  
Rating Scale ◽  
Maximum Voluntary Contraction ◽  
Exercise Program ◽  
Masticatory Muscles ◽  
Voluntary Contraction ◽  
Bite Force ◽  
Exercise Programs ◽  
Neuromuscular Activation

Pain in masticatory muscles is one of the most frequent symptoms in patients with temporomandibular disorders (TMD) and can lead to changes in the patterns of neuromuscular activity of masticatory muscles and decrease in bite force. This study assesses the effects of three eight-week exercise programs on pain intensity, neuromuscular activation, and bite force of masticatory muscles in patients with TMD. Forty-five patients were divided into three groups: a therapeutic exercise program (G1), a therapeutic and aerobic exercise program (G2), and an aerobic exercise program (G3). The masticatory muscles’ pain was evaluated using the numeric pain rating scale (NPRS), surface electromyographic (sEMG) activity of the masseter was recorded during maximum voluntary contraction and at rest, and bite force was evaluated using a dynamometer. These parameters were evaluated twice at baseline (A01/A02), at the end of the eight-week intervention period (A1), and 8–12 weeks after the end of the intervention (A2). After intervention, G2 showed the best results, with a significantly decrease in masticatory muscles’ pain and increase in bite force. These results suggest that interventions to reduce pain in patients with TMD should be multimodal.

Electromyographic Investigation of Masticatory Muscles in Unilateral Cleft Lip and Palate Patients with Anterior Crossbite

1998 ◽  
Vol 35 (5) ◽  
pp. 415-418 ◽  
Author(s):  
Weiran Li ◽  
Jiuxiang Lin ◽  
Minkui Fu
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Masticatory Muscles ◽  
Asymmetry Index ◽  
Chinese Patients ◽  
Control Group ◽  
Electromyographic Activity ◽  
Normal Individuals ◽  
Masseter Muscles ◽  
Electromyographic Investigation

Objective To evaluate the characteristics of masticatory muscle activity in operated unilateral cleft lip and palate (UCLP) patients with anterior crossbite compared with normal individuals. Subjects Sixteen male and 13 female Chinese patients with UCLP and anterior crossbite. Fifteen male and 13 female Chinese individuals without cleft abnormalities served as a control group. Design Electromyographic activity of the masseter muscles and anterior temporalis muscles was recorded bilaterally in different mandibular positions using bipolar surface electrodes. Results Compared to noncleft controls, patients with UCLP demonstrated (1) higher activation levels of masseter and temporalis muscles in the rest position, (2) lower potential function of masseter and temporalis, (3) inharmonious activity of the masticatory muscles during mandibular border movement, (4) a higher asymmetry index of the masseter and temporalis muscles, and (5) longer silent periods of the two muscles. Conclusions The function of masticatory muscles is different in patients with UCLP with anterior crossbite. Muscle function should be considered when evaluating cleft patients for orthodontic treatment and orthognathic surgery.

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.

Upper extremity muscle activity during household floor vacuuming with upright cleaners

2018 ◽  
Vol 62 (1) ◽  
pp. 1018-1021
Author(s):  
Haerim Bak ◽  
Clive D’Souza ◽  
Gwanseob Shin
Keyword(s):  
Upper Extremity ◽  
Muscle Activity ◽  
Maximum Voluntary Contraction ◽  
Voluntary Contraction ◽  
Activity Levels ◽  
Physical Demands ◽  
Study Results ◽  
Musculoskeletal Problems ◽  
Muscle Groups ◽  
Intensive Work

Physical demands of household carpet vacuuming and associated risks for musculoskeletal problems have received little attention although the level of muscle exertions is often assumed to be similar to that of occupational vacuuming. The aim of this study was to quantitatively assess the level of muscle activities of the upper extremity during carpeted floor vacuuming with household upright vacuum cleaners. Eighteen participants conducted four different carpet vacuuming tasks with two different cleaner models. Electromyography data from seven upper extremity muscles were collected. Median muscle activity ranged from 4.5% to 47.5% of the maximum voluntary contraction capacity for female participants and from 2.7% to 23.6% for male participants. Normalized muscle activity levels were significantly higher in women compared to men across tasks and muscle groups. Study results suggest that home vacuuming with upright vacuum cleaners is physically intensive work, especially for female users who are less physically capable.

Quality of Life and Temporomandibular Disorders in Patients With Skeletal Class III Malocclusion With Cleft Lip and Palate

2021 ◽  
pp. 105566562110434
Author(s):  
Bernardo Olsson ◽  
Isabela Polesi Bergamaschi ◽  
Erika Calvano Küchler ◽  
Aline Monise Sebastiani ◽  
Guilherme dos Santos Trento ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Temporomandibular Disorders ◽  
Psychological Factors ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Skeletal Class ◽  
Better Than

Objective The aim of the study was to assess the quality of life (QOL), oral health-related QOL (OHRQOL), temporomandibular disorders (TMDs), and psychological factors in patients with skeletal Class III malocclusion with cleft lip and palate (CLP) and without CLP. Design Case–control. Setting Primary care, institutional practice. Patients One hundred thirty-six patients with skeletal Class III malocclusion with CLP (n = 68) and without CLP (n = 68). Main outcome measures QOL and OHRQOL were assessed using the World Health Organization Quality of Life-BREF (WHOQOL-BREF) questionnaire and the Oral Health Impact Profile-14 questionnaire, respectively. TMDs and psychological factors were assessed using the Research Diagnostic Criteria for TMD (RDC/TMD). Results No differences in QOL were found between the groups ( P >  0.05). Patients with CLP reported a better OHRQOL ( P = 0.025) in the physical pain, physical disability, and psychological disability domains ( P <  0.05). Patients with CLP presented with less myofascial pain (OR, 0.28; 95% CI, 0.11-0.71] and other articular conditions (OR 0.24; 95% CI 0.06-0.90]. More patients with CLP reported no chronic pain ( P = 0.012). The QOL of patients with CLP with no depression or with no nonspecific physical symptoms including pain (NSPSIP) was better than that of patients without CLP. The OHRQOL of patients with CLP without TMDs or no psychological factors was better than that of patients without CLP. Conclusions Patients with skeletal Class III malocclusion who require orthognathic surgery with CLP have better OHRQOL and present with fewer TMDs than those patients without CLP.

Wrist and Shoulder Muscle Activity Changes Across Computer Tasks

2002 ◽  
Vol 46 (13) ◽  
pp. 1129-1132 ◽  
Author(s):  
Jack Dennerlein ◽  
Maria-Helena DiMarino ◽  
Ted Becker ◽  
Peter Johnson
Keyword(s):  
Muscle Activity ◽  
Maximum Voluntary Contraction ◽  
Trapezius Muscle ◽  
Surface Emg ◽  
Voluntary Contraction ◽  
Office Work ◽  
Shoulder Muscle ◽  
Physical Risk Factors ◽  
Computer Workstation ◽  
Muscle Groups

The computer workstation is a ubiquitous tool in the office work environment; however, its use varies across many different tasks from surfing the Internet to typing. The question, therefore, is how does exposure to different physical risk factors for musculoskeletal disorders vary across tasks? Fifteen adults (10 females, 5 males) completed tasks simulating work at a computer workstation. The tasks were typing text, completing an html-based form, editing a document, a graphics task, and finally navigating through a series of web pages. During these tasks the muscle activity of the wrist prime movers and three shoulder muscle groups were recorded using surface EMG. For the wrist, the extensors were the most active ranging on average from 8 to 25 percent of Maximum Voluntary Contraction amplitude, with the greatest activity occurring in the typing task. The wrist activity decreased when the work changed from a keyboard-based activity to predominantly mouse-based activity. For the shoulder, the greatest activity was in the Trapezius muscle. The shoulder muscles were most active when both the mouse and the keyboard were required by the task. in summary, wrist and shoulder muscle activities at a computer workstation depend upon the type of task at hand.

scholarly journals The electrical activity of the masticatory muscles in children with cleft lip and palate

2017 ◽  
Vol 28 (2) ◽  
pp. 257-265 ◽  
Author(s):  
Liliana Szyszka-Sommerfeld ◽  
Krzysztof Woźniak ◽  
Teresa Matthews-Brzozowska ◽  
Beata Kawala ◽  
Marcin Mikulewicz ◽  
...  
Keyword(s):  
Electrical Activity ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Masticatory Muscles

scholarly journals Motor planning perturbation: muscle activation and reaction time

2018 ◽  
Vol 120 (4) ◽  
pp. 2059-2065
Author(s):  
Stefan Delmas ◽  
Agostina Casamento-Moran ◽  
Seoung Hoon Park ◽  
Basma Yacoubi ◽  
Evangelos A. Christou
Keyword(s):  
Reaction Time ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Maximum Voluntary Contraction ◽  
Motor Planning ◽  
Reaction Time Task ◽  
Voluntary Contraction ◽  
Voluntary Activation ◽  
Time Interval ◽  
Voluntary Activity

Reaction time (RT) is the time interval between the appearance of a stimulus and initiation of a motor response. Within RT, two processes occur, selection of motor goals and motor planning. An unresolved question is whether perturbation to the motor planning component of RT slows the response and alters the voluntary activation of muscle. The purpose of this study was to determine how the modulation of muscle activity during an RT response changes with motor plan perturbation. Twenty-four young adults (20.5 ±1.1 yr, 13 women) performed 15 trials of an isometric RT task with ankle dorsiflexion using a sinusoidal anticipatory strategy (10–20% maximum voluntary contraction). We compared the processing part of the RT and modulation of muscle activity from 10 to 60 Hz of the tibialis anterior (primary agonist) when the stimulus appeared at the trough or at the peak of the sinusoidal task. We found that RT ( P = 0.003) was longer when the stimulus occurred at the peak compared with the trough. During the time of the reaction, the electromyography (EMG) power from 10 to 35 Hz was less at the peak than the trough ( P = 0.019), whereas the EMG power from 35 to 60 Hz was similar between the peak and trough ( P = 0.92). These results suggest that perturbation to motor planning lengthens the processing part of RT and alters the voluntary activation of the muscle by decreasing the relative amount of power from 10 to 35 Hz. NEW & NOTEWORTHY We aimed to determine whether perturbation to motor planning would alter the speed and muscle activity of the response. We compared trials when a stimulus appeared at the peak or trough of an oscillatory reaction time task. When the stimulus occurred at the trough, participants responded faster, with greater force, and less EMG power from 10-35 Hz. We provide evidence that motor planning perturbation slows the response and alters the voluntary activity of the muscle.

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