Understanding the role of osteoarthrosis on electromyographic activity of masticatory muscles and quality of life

Righetti, M.; Taube, Oswaldo Luiz Stamato; Palinkas, Marcelo; Gonçalves, Lígia Maria Napolitano; Rufato, Fernanda Cristina Toloi; Arnoni, Veridiana Wanshi; Silva, Nayara da; Regalo, Simone Cecílio Hallak; Siéssere, Selma

doi:10.4317/jced.56582

Cited by 7 publications

(5 citation statements)

References 23 publications

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“…Several studies have analyzed the electromyographic activity of masticatory muscles in different situations of urban populations such as age, sex, temporomandibular dysfunction, chronic degenerative diseases, dentition status, and oral parafunctional habits [15][16][17][18], but there is a gap in the literature that does not show the masticatory muscle behavior of specific populations with eating habits of native villagers, such as indigenous populations.…”

Section: Discussionmentioning

confidence: 99%

Stomathognatic system function in indigenous people from Brazilian Xingu villages: An electromyographic analysis

et al. 2020

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The maintenance of postural balance can be influenced by the lifestyle of a population. This study aimed to determine the electromyographic activity of the masseter and temporalis muscles during mandibular tasks and habitual and non-habitual chewing in indigenous individuals to reveal the differences among white Brazilian individuals. Sixty Brazilians (18 and 28 years) were divided into two groups: 30 Xingu indigenous individuals and 30 white Brazilian individuals, with 20 men and 10 women in each group. The individuals were assessed using the normalized electromyographic activity of mandibular tasks (rest, protrusion, right and left laterality) and electromyographic activity of masticatory cycles in habitual (peanuts and raisins) and non-habitual (Parafilm M) chewing. Data were analyzed using Student’s t-test (p < .05). Comparisons between the groups demonstrated significant differences. Indigenous individuals group presented a decrease in the normalized electromyographic activity of the masticatory muscles during mandibular rest [right masseter (p = .002) and left masseter (p = .004) muscles]. There was increase in the normalized electromyographic activity during protrusion [left temporal (p = .03) muscle]. There was increase in the electromyographic activity during chewing: peanuts [right masseter (p = .001), left masseter (p = .001) and right temporal (p = .01) muscles], raisins [right masseter (p = .001), left masseter (p = .002), right temporal (p = .008), left temporal (p = .01) muscles] and Parafilm M [left masseter muscle (p = .05)]. From the findings of this study, we concluded that in the comparison between indigenous and white individuals, positive changes were observed in the electromyographic pattern of the masticatory muscles in the mandibular postural conditions, with greater masticatory efficiency in the indigenous group.

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Section: Discussionmentioning

confidence: 99%

Stomathognatic system function in indigenous people from Brazilian Xingu villages: An electromyographic analysis

et al. 2020

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“…For the EMG evaluation, the masseter and temporalis muscles were analyzed in the following clinical conditions: rest (10s), right laterality (10s), left laterality (10s), protrusion (10s) and dental clenching with Parafilm M® (Pechinery Plastic Packaging, Batavia, IL, USA), folded (18x17x4mm, 245 mg) positioned between the occlusal surfaces of the superior and inferior first molars, bilaterally (10s). The EMG signals were collected during clinical conditions and verified using the root-mean-square (RMS) [ 20 ]. For the dynamic evaluation of forces during mastication, the efficiency of the masticatory cycles was verified utilizing the integrated linear envelope EMG of the masseter and temporalis muscles (bilaterally).…”

Section: Methodsmentioning

confidence: 99%

Electromyographic analysis of stomatognathic muscles in elderly after hippotherapy

et al. 2020

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The aging process affects the entire human body, including the stomatognathic system, and can trigger not only occlusal but also postural imbalances involving other muscular chains. Hippotherapy has been used to promote cervical, postural, and balance control in individuals with diverse impairments. The present study used electromyography to evaluate the masseter and temporal muscles in an elderly population pre-and post-hippotherapy. Participants included 17 individuals, mean age 66,5±7 years. Electromyographic recording of the bilateral masseter and temporal muscles was performed during the postural resting condition and activities that involved the active participation of these muscles in different conditions. The practitioner performed no other type of activity or exercise during the intervention because the objective is to evaluate the effect of the three-dimensional movement provided by the horse. Raw electromyographic data were tabulated using commercially available software (IBM ® SPSS ® Statistics 234.0) and subjected to statistical analysis, in which p � 0.05 was considered to be statistically significant. Post-hippotherapy, there was lower electromyographic activity for the masseter and temporalis muscles in all the static mandibular tasks, with significant effect for time for the right temporal muscle (p = 0.038), the left temporal muscle (p = 0.028) and in the all dynamic mandibular tasks for the left temporal muscle (p = 0.025) and the left masseter muscle (p = 0.027). Hippotherapy promotes a reduction in the myoelectric activity of the masticatory muscles of elderly individuals.

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“…Muscle activity was measured by means of electromyographic records (microvolts/second) of mandibular tasks according to the standard established by the electromyography laboratory from the University [15,16]. Dental clenching during maximum voluntary contraction was used to normalize the electromyographic data.…”

Section: Electromyographic Analysismentioning

confidence: 99%

“…At the time of data collection, the participants remained seated in comfortable chairs, in upright posture, feet at on the oor, and palms at on their thighs. The Frankfurt's horizontal plane was kept parallel to the ground [16,17].…”

Section: Electromyographic Analysismentioning

confidence: 99%

Crossfit Practice: An Electromyographic Analysis of Masticatory Muscles

Silva¹,

Palinkas²,

Fioco³

et al. 2020

Preprint

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Background: CrossFit is a regular high-intensity physical conditioning exercise for skeletal striated muscles, which promotes functional changes in the human body. The aim of this study was to investigate the impact of CrossFit exercise on the electromyographic activity of the masseter and temporalis muscles. Methods: Forty participants were divided into two groups: athletes who practiced CrossFit (n=20) and controls who did not practice sports (n=20). The electromyographic activities of the masseter and temporalis muscles were measured using mandibular tasks at rest, protrusion, right laterality, left laterality, and dental clenching in maximum voluntary contraction and habitual chewing of peanuts and raisins. Both the groups were matched for age, sex, and body mass index. The data were analyzed using the t-test with a 5% significance level. Results: Reduced electromyographic activities were found in all mandibular tasks in the CrossFit group than in the control group, with a significant difference for the right masseter (p=0.01), left masseter (p=0.001), and left temporal muscles (p=0.001) at mandibular rest; right (p=0.001) and left (p=0.001) masseter in chewing of peanuts. Conclusion: The results of this study suggest that CrossFit promotes positive changes in electromyographic activity of the masticatory muscles, especially in the mandibular rest and chewing of hard food. CrossFit exercise practiced within the appropriate technical protocols improves masticatory muscle function.

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Understanding the role of osteoarthrosis on electromyographic activity of masticatory muscles and quality of life

Abstract: Osteoarthrosis on electromyographic activity of masticatory muscles and quality of life e342

Cited by 7 publications

References 23 publications

Stomathognatic system function in indigenous people from Brazilian Xingu villages: An electromyographic analysis

Stomathognatic system function in indigenous people from Brazilian Xingu villages: An electromyographic analysis

Electromyographic analysis of stomatognathic muscles in elderly after hippotherapy

Crossfit Practice: An Electromyographic Analysis of Masticatory Muscles

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