Pattern of maximum voluntary contraction in patients with temporomandibular disorder before and after speech therapy with and without use of elastic bandages / Padrão de contração voluntária máxima em pacientes com disfunção temporomandibular antes e após terapia fonoaudiológica com e sem uso de bandagem elástica

ABSTRACT Purpose: to verify if there is an electromyographic difference during maximal (maximum) voluntary contraction of the masseter and temporalis muscles in patients with temporomandibular disorders, before and after speech therapy intervention with and without the use of therapeutic elastic bandages. Methods: an analysis of secondary data from a clinical intervention study, carried out with 17 adult volunteers, diagnosed with temporomandibular muscle dysfunction with or without disc displacement with reduction. The Bandage Group received manual therapy associated with elastic bandages and the No Bandage Group received only manual therapy. Surface electromyography was performed to record the Maximum Voluntary Contraction before and after four weeks of speech therapy intervention. For exploratory analysis, the Mann Whitney and Wilcoxon paired tests were used, with P<0.05. Results: in the Bandage Group, there was a statistically significant decrease in electrical activity during Maximum Voluntary Contraction in the masseter and temporalis muscles on the left side at the post-therapeutic moment. Comparing the pre- and post-intervention between Bandage Group and No Bandage Group, a statistical difference was found in the electrical activity values of the Maximum Voluntary Contraction in the left temporal muscle. Conclusion: manual myofunctional speech therapy, associated or not with the use of therapeutic elastic bandages, impacts the muscle activity of the masseter and temporal muscles during Maximum Voluntary Contraction, whether the values demonstrate relaxation and/or equivalence of the electromyographic values of the masticatory muscles.

RESUMO Objetivo: verificar se há diferença eletromiográfica durante contração voluntária máxima dos músculos masseter e temporal de pacientes com disfunção temporomandibular, antes e após intervenção fonoaudiológica com e sem uso de bandagem elástica terapêutica. Métodos: foi realizada a análise de dados secundários de estudo do tipo intervenção clínica, com 17 voluntárias, adultas, com diagnóstico de disfunção temporomandibular muscular com ou sem deslocamento de disco com redução. O Grupo Bandagem recebeu terapia manual associada à bandagem elástica e o Grupo Sem Bandagem recebeu apenas terapia manual. Foi realizada eletromiografia de superfície para registro da contração voluntária máxima antes e após quatro semanas de intervenção fonoaudiológica. Para análise exploratória foram utilizados os testes: Mann Whitney e Wilcoxon Pareado, com p<0,05. Resultados: no Grupo Bandagem, houve diminuição estatisticamente significante da atividade elétrica durante a Contração Voluntária Máxima nos músculos masseter e temporal do lado esquerdo no momento pós-terapêutico. Na comparação do pré e pós-intervenção entre Grupo Bandagem e Grupo Sem Bandagem, constatou-se diferença estatística nos valores da atividade elétrica de Contração Voluntária Máxima no músculo temporal esquerdo. Conclusão: a terapia fonoaudiológica miofuncional manual, associada ou não ao uso da bandagem elástica terapêutica, impacta a atividade muscular dos músculos masseter e temporal durante a Contração Voluntária Máxima, sejam os valores demonstrando relaxamento e/ou equivalência dos valores eletromiográficos da musculatura mastigatória.

The squat exercise recruits core muscles as much as localized exercises / O exercício de agachamento recruta músculos do tronco tanto quanto exercícios localizados

Abstract Introduction In the context of resistance training, which encompasses both strengthening and rehabilitation, the incorporation of global range exercises demands intense activation of the trunk muscle groups, which play a primary role in body stabilization. The squat, notorious for its complexity and effectiveness in activating stabilizers during execution, raises a central question: whether this exercise recruits the muscles more significantly compared to localized exercises, such as push-ups and trunk exten-sions. Objective To identify the degree of activation of the trunk muscles during squats and compare it with localized exercises for the trunk muscles: lumbar and abdominal. Methods Using surface electromyography, the activation of the iliocostalis, multifidus, internal oblique, external oblique and rectus abdominis muscles was evaluated. The sample included 16 physically active volunteers of both sexes. A repeated measures t-test (α < 0.05) was used as an analysis method. Results The iliocostalis, multifidus and internal oblique muscles showed similar levels of activation both in the squat and in their respective isolated exercises, while the rectus abdominis and external oblique muscles showed greater activity during trunk flexion. Conclusion It is possible to infer that squats are an effective exercise for training the iliocostalis, multifidus and internal oblique muscles, while localized exercises are more suitable for strengthening the external oblique and rectus abdominis muscles. Such conclusion can contribute to optimizing the planning of exercise sessions by replacing isolated trunk exercises with squats.

Resumo Introdução No contexto do treinamento resistido, que engloba tanto o fortalecimento quanto a reabilitação, a incorporação de exercícios de alcance global demanda uma intensa ativação dos grupos musculares do tronco, os quais desempenham um papel primordial na estabilização corporal. O agachamento, notório por sua complexidade e eficácia na ativação dos estabilizadores durante a execução, suscita uma questão central: se o agachamento recruta de forma mais acentuada a musculatura do tronco comparativamente a exercícios localizados, tais como flexões e extensões do tronco. Objetivo Identificar o grau de ativação dos músculos do tronco durante o agachamento e confrontá-lo com exercícios localizados para a musculatura do tronco: lombar e abdominal. Métodos Através da aplicação da eletromiografia de superfície, avaliou-se a ativação dos músculos iliocostal, multífido, oblíquo interno, oblíquo externo e reto abdominal. A amostra englobou 16 voluntários de ambos os gêneros, fisicamente ativos. Empregou-se um teste t de medidas repetidas (α < 0,05) como método de análise. Resultados Os músculos iliocostal, multífido e oblíquo interno manifestaram níveis semelhantes de ativação tanto no agachamento quanto em seus respectivos exercícios isolados, enquanto os músculos reto abdominal e oblíquo externo apresentaram maior atividade durante a flexão do tronco. Conclusão É possível inferir que o agachamento se configura como um exercício eficaz para o treinamento do iliocostal, multífido e oblíquo interno, enquanto os exercícios localizados se revelam mais indicados para o fortalecimento do oblíquo externo e dos músculos reto abdominais. Tais conclusões podem contribuir para a otimização do planejamento de sessões de exercícios, mediante a substituição de exercícios isolados de tronco pelo agachamento.

Perfil clínica y electromiográfico de las distrofias musculares en República Dominicana / Clinical and electromyographic profile of muscular dystrophies in the Dominican Republic

Introducción: Las distrofias musculares son trastornos miogénicos hereditarios caracterizados por una atrofia muscular progresiva y una debilidad de distribución y gravedad variable. La población de Republica Dominicana es fruto de una mezcla de etnias, haciéndola portadora de una herencia cromosómica y ADN diverso, siendo susceptibles a poder presentar cualquier desorden de carácter hereditario. Material y métodos: Con una muestra de 17 pacientes obtenidos entre septiembre 2019- marzo 2020, se realizó un estudio retrospectivo, descriptivo y transversal, en el cual se hizo una revisión de los expedientes de la clínica de miopatías en la consulta de neurología pediátrica del Hospital Infantil Doctor Robert Reid Cabral, para describir el perfil clínico de los pacientes con distrofia muscular y los hallazgos de electromiografía en los casos que la misma. Resultados: se encontró que la distribución de la edad correspondió a 5-9 años en un 53%, siendo el sexo masculino, el más frecuente. En el 70.59% presentaron antecedentes familiares de distrofia muscular. Los principales motivos de consulta fueron cansancio y caídas frecuentes. Conclusión: En los hallazgos de electromiografía, el porcentaje de pacientes que presentó esta prueba con alteraciones fue de 88.24% y sin alteraciones el 11.76%. Esto nos demuestra, la gran utilidad de dicho estudio en el diagnóstico de las distrofias musculares en países donde no se cuenta con estudio molecular, siendo una de las pruebas esenciales en el abordaje diagnóstico de los pacientes con sospecha clínica de dichas patologías.

Introduction: Muscular dystrophies are hereditary myogenic disorders characterized by progressive muscular atrophy and weakness of variable distribution and severity. The population of the Dominican Republic is the result of a mixture of ethnic groups, making it the bearer of a diverse chromosomal inheritance and DNA, being susceptible to presenting any hereditary disorder. Methods: With a sample of 17 patients obtained between September 2019-March 2020, a retrospective, descriptive and cross-sectional study, in which a review of the files of the myopathies clinic was made in the pediatric neurology consultation of the Children's Hospital Doctor Robert Reid Cabral, to describe the clinical profile of patients with muscular dystrophy and the electromyography findings in the cases with the same. Results: The age distribution corresponded to 5-9 years; 53%, being the masculines, the most frequent sex. In 70.59%, there was a family history of muscular dystrophy. The main reasons for consultation were fatigue and frequent falls. Conclusion: In the electromyography findings, the percentage of patients who presented this test with alterations was 88.24% and 11.76% without alterations. This result shows us the great utility of said study in the workup of muscular dystrophies in countries with no availabilities for molecular studies, being one of the essential tests in the diagnostic approach of patients with clinical suspicion of said pathologies.

Multisensory Conflict Impairs Cortico-Muscular Network Connectivity and Postural Stability: Insights from Partial Directed Coherence Analysis / 神经科学通报·英文版

Sensory conflict impacts postural control, yet its effect on cortico-muscular interaction remains underexplored. We aimed to investigate sensory conflict's influence on the cortico-muscular network and postural stability. We used a rotating platform and virtual reality to present subjects with congruent and incongruent sensory input, recorded EEG (electroencephalogram) and EMG (electromyogram) data, and constructed a directed connectivity network. The results suggest that, compared to sensory congruence, during sensory conflict: (1) connectivity among the sensorimotor, visual, and posterior parietal cortex generally decreases, (2) cortical control over the muscles is weakened, (3) feedback from muscles to the cortex is strengthened, and (4) the range of body sway increases and its complexity decreases. These results underline the intricate effects of sensory conflict on cortico-muscular networks. During the sensory conflict, the brain adaptively decreases the integration of conflicting information. Without this integrated information, cortical control over muscles may be lessened, whereas the muscle feedback may be enhanced in compensation.

Effect of the staging comprehensive treatment with acupuncture-moxibustion on Bell's facial palsy in the acute stage / 中国针灸

OBJECTIVES@#To compare the clinical effect on Bell's facial palsy in the acute stage between the staging comprehensive treatment with acupuncture-moxibustion and western medication.@*METHODS@#Sixty patients with Bell's facial palsy in the acute stage were randomly divided into an observation group and a control group, with 30 cases in each one. The patients in the control group were administered orally with prednisone acetate tablets and methylcobalamin tablets until the 28th day of illness. In the observation group, the staging comprehensive treatment with acupuncture-moxibustion was adopted. On the affected side, Qianzheng (EX-HN 16), Yifeng (TE 17), Sibai (ST 2), Yangbai (GB 14), Jiache (ST 6), Dicang (ST 4) and Touwei (ST 8), etc. were stimulated. In the acute stage (Day 1 to 7 of illness), the routine acupuncture and the point-toward-point needle insertion were delivered, no any manipulation was exerted at acupoints, and the needles were retained for 30 min. In the subacute stage (Day 8 to 14 of illness), on the base of the treatment as the acute stage, the depth of needle insertion was adjusted at a part of acupoints and the even needling technique was operated by twisting needle. Besides, electroacupuncture (EA) was attached to Qianzheng (EX-HN 16) and Dicang (ST 4), with continuous wave of low intensity and high frequency, 100 Hz, for 20 min. In the recovery stage (Day 15 to 28 of illness), on the base of the treatment as the subacute stage, the heavy stimulation of acupuncture was given, in which, the sticking and lifting needle techniques were delivered after the needles were inserted from Sibai (ST 2) toward Dicang (ST 4), and from Dicang (ST 4) toward Jiache (ST 6), separately; warm needling was operated at Yifeng (TE 17), and EA changed to stimulate the acupoints with the intermittent wave of high intensity and low frequency, 2 Hz, for 30 min. Acupuncture-moxibustion was given once every other day until the end of the 28th day of illness. The level of House-Brackmann facial nerve function rating scale (H-B grade),the score of Sunnybrook facial nerve grading system (Sunnybrook), the score of facial disability index (FDI), the temperature difference in the infrared thermal imaging facial area and electromyogram (EMG) situation of the affected muscle group were observed before and after treatment in the two groups. Using musculoskeletal ultrasound,the facial nerve diameter was detected and the clinical effect was compared between the two groups.@*RESULTS@#After treatment, the level of H-B grade, Sunnybrook score, the scores of physical function and social life function in FDI were improved when compared with those before treatment in the patients of either group (P<0.01, P<0.05), and the results of these evaluations in the observation group were better than those of the control group (P<0.05). After treatment, the temperature difference of the frontal area, the eye area, the zygomatic area and the mouth corner was declined in comparison with that before treatment in the two groups (P<0.05), and the temperature difference in each area in the observation group was lower than that of the control group (P<0.05).The root mean square (RMS) of the frontal muscle group, the zygomatic muscle group and the orbicularis muscle group on the affected side increased in comparison with that before treatment in the two groups (P<0.01), and RMS of the observation group was higher than that of the control group (P<0.05) after treatment. Before treatment, the diameter of the facial nerve on the affected side was larger than that on the healthy side (P<0.01), and after treatment, the diameter on the affected side was reduced when compared with that before treatment in the two groups (P<0.01); the diameter of the facial nerve on the affected side in the observation group was smaller than that of the control group (P<0.05), while, the diameter on the affected side was larger when compared with the healthy side in the control group (P<0.05). The total effective rate of the observation group was 93.3% (28/30), higher than that of the control group (83.3% [25/30], P<0.05).@*CONCLUSIONS@#The staging comprehensive treatment with acupuncture-moxibustion is clearly effective on Bell's facial palsy in the acute stage, which affirms the effectiveness of acupuncture-moxibustion for the acute stage of Bell's facial palsy in comparison with conventional western medication.

Electrophysiological evaluation of the neuromuscular junction: a brief review / Avaliação eletrofisiológica da junção neuromuscular: breve revisão

Abstract The nerve terminal and muscle membrane compose the neuromuscular junction. After opening the voltage-gated calcium channels, action potentials from the motor axons provoke a cascade for the acetylcholine release from synaptic vesicles to the synaptic cleft, where it binds to its receptor at the muscle membrane for depolarization. Low amplitude compound muscle action potential typically presents in presynaptic disorders, increasing by more than 100% after a 10-second effort in the Lambert-Eaton myasthenic syndrome and less in botulism. Needle electromyography may show myopathic motor unit action potentials and morphological instability ("jiggle") due to impulse blocking. Low-frequency repetitive nerve stimulation (RNS) is helpful in postsynaptic disorders, such as myasthenia gravis and most congenital myasthenic syndromes, where the number of functioning acetylcholine receptors is reduced. Low-frequency RNS with a decrement >10% is abnormal when comparing the 4th to the first compound muscle action potential amplitude. High-frequency RNS is helpful in presynaptic disorders like Lambert-Eaton myasthenic syndrome, botulism, and some rare congenital myasthenic syndromes. The high-frequency RNS releases more calcium, increasing the acetylcholine with a compound muscle action potential increment. Concentric needle records apparent single-fiber action potentials (spikes). A voluntary activation measures the jitter between spikes from two endplates. An electrical activation measures the jitter of one spike (one endplate). The jitter is the most sensitive test for detecting a neuromuscular junction dysfunction. Most neuromuscular junction disorders are responsive to treatment.

Resumo O nervo terminal e a membrana muscular compõem a junção neuromuscular. Após a abertura dos canais de cálcio dependentes de voltagem, os potenciais de ação do axônio motor provocam uma cascata de eventos que libera acetilcolina das vesículas para a fenda sináptica, ligando-se ao receptor na membrana muscular para despolarização. O potencial de ação muscular composto de baixa amplitude ocorre nas desordens pré-sinápticas, aumentando em mais de 100% após esforço de 10 segundos na síndrome miastênica de Lambert-Eaton e menos no botulismo. A eletromiografia pode mostrar potenciais de ação da unidade motora miopáticos e instabilidade morfológica ("jiggle") devido ao bloqueio do impulso. Estimulação nervosa repetitiva (ENR) de baixa frequência é útil nos distúrbios pós-sinápticos, como miastenia gravis e a maioria das síndromes miastênicas congênitas, quando há número reduzido de receptores de acetilcolina funcionantes. ENR de baixa frequência com decremento >10% é anormal comparando-se à amplitude do quarto com o primeiro potencial de ação muscular composto. ENR de alta frequência é útil nas doenças pré-sinápticas, como síndrome miastênica de Lambert-Eaton, botulismo e algumas síndromes miastênicas congênitas raras. ENR de alta frequência libera mais cálcio, aumenta acetilcolina, resultando em incremento do potencial de ação muscular composto. O eletrodo de agulha concêntrico registra potenciais de ação aparente de fibra única (PAAFU). Ativação voluntária mede jitter entre dois PAAFUs (duas junções neuromusculares). Ativação elétrica mede jitter de um PAAFU (uma junção neuromuscular). Jitter é o teste mais sensível para detectar disfunção de junção neuromuscular. A maioria dos distúrbios juncionais é responsiva ao tratamento.

Uso de Electromiografía de Alta Densidad en las Distrofias Musculares: una Mirada Actual / Use of high-density electromyography in muscular dystrophies: a current look

Introducción. Las distrofias musculares son trastornos genéticamente heredados que causan la degeneración progresiva de las fibras musculares. La electromiografía, especialmente la de alta densidad, se ha convertido en una herramienta valiosa para el diagnóstico y el estudio de la función muscular de trastornos neuromusculares. Objetivo. Describir y discutir el uso actual de esta técnica en las distrofias musculares. Métodos. Se realizó un Scoping Review sobre el uso de electromiografía de alta densidad en personas con distrofia muscular. Se buscó en PubMed, ScienceDirect, Scopus, Web of Science y Biblioteca Cochrane Plus, usando palabras clave en inglés y español. Se consideraron estudios desde 2015 a la fecha. Se identificaron tres artículos que cumplían con los criterios establecidos. Resultados. Los estudios se centraron en aplicaciones clínicas y de bioingeniería para personas con distrofia muscular de Duchenne y distrofia facioescapulohumeral. Los resultados sugieren que variables como la fatiga, la activación temporo-espacial y la dimensionalidad en gestos motores están determinados por la degeneración de las fibras musculares, el reemplazo por tejido fibrótico, los cambios adaptativos y la debilidad muscular progresiva característica de este grupo de condiciones. Se resalta la utilidad de la electromiografía de alta densidad en la evaluación y el manejo de la distrofia muscular. Conclusiones. El uso de esta técnica en estos trastornos neuromusculares sigue en aumento, pero se hace necesario explorar más aristas para ampliar su uso como herramienta en el estudio y en el desarrollo de intervenciones terapéuticas en esta condición por parte de profesionales de la salud.

Background. Muscular dystrophies are genetically inherited disorders that cause progressive degeneration of muscle fibers. Electromyography, especially high-density electromyography, has become a valuable tool for the diagnosis and study of muscle function in neuromuscular disorders, so the objective of this study is to describe and discuss the current use of this technique in muscular dystrophies. Methods. A Scoping Review was carried out on the use of high density electromyography in people with muscular dystrophy. PubMed, ScienceDirect, Scopus, Web of Science, and Cochrane Plus Library were searched using keywords in English and Spanish. Studies from 2015 to date were considered. Three articles were identified that met the established criteria. Results. The studies focused on clinical and bioengineering applications for people with Duchenne muscular dystrophy and facioscapulohumeral dystrophy. The results suggest that variables such as fatigue, temporal-spatial activation and dimensionality in motor gestures are determined by the degeneration of muscle fibers, replacement by fibrotic tissue, adaptive changes and progressive muscle weakness characteristic of this group of conditions. The usefulness of high-density electromyography in the evaluation and management of muscular dystrophy is highlighted. Conclusions. The use of this technique in these neuromuscular disorders continues to increase, but it is necessary to explore more aspects to expand its use as a tool in the management of this condition.

A web-based survey to map the electromyography practice in Brazil / Uma enquete via internet para mapear a prática de eletromiografia no Brasil

Abstract Background Detailed information about the electromyography practice in Brazil is largely unavailable. Objective To evaluate where and how electromyography is performed in Brazil, as well as regional disparities and the professional and academic credentials of electromyographers. Methods We conducted an internet-based survey of active Brazilian electromyographers. The websites of health insurance companies, professional academies, medical cooperatives, online search engines, and social networks in each Brazilian state were screened and we evaluated the credentials of each electromyographer listed in the Brazilian Federal Medical Board (BFMB) registration website and their online curricula vitae in the Brazilian National Council for Scientific and Technological Development (Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, in Portuguese). We also evaluated the same parameters in a control group of non-electromyographer neurologists randomly matched by geographical distribution and gender. Results We found 469 electromyographers (384 neurologists and 85 non-neurologists), with a male predominance. In total, 81.9% were BFMB-certified neurologists, 49.9%, BFMB-certified clinical neurophysiologists, and 10.4%, BFMB-certified physiatrists. Among the non-neurologists, 48.2% were physiatrists. Most electromyographers practiced in states on the Southern and Southeastern regions of Brazil. When adjusted by population, the Federal District and the states of Mato Grosso do Sul and Goiás presented the highest of eletromyographers density. Electromyographers were not more likely to have current/past academic affiliations. Conclusion In Brazil, electromyography is performed predominantly by neurologists, and half of them are BFMB-certified clinical neurophysiologists. The present study highlights regional disparities and may guide government-based initiatives, for instance, to improve the diagnosis of leprosy and the management of neuromuscular disorders within the Brazilian territory.

Resumo Antecedentes Informações detalhadas sobre a prática de eletromiografia no Brasil são em grande parte indisponíveis. Objetivo Avaliar onde e como a eletromiografia é realizada no Brasil, as disparidades regionais, e as credenciais profissionais e acadêmicas dos eletromiografistas. Métodos Realizamos uma enquete via internet de eletromiografistas brasileiros ativos. Foram rastreados sites de operadoras de planos de saúde, academias profissionais médicas, cooperativas médicas, ferramentas de busca online e redes sociais em cada estado brasileiro. Em seguida, avaliamos as credenciais de cada eletromiografista listado no site de registro do Conselho Federal de Medicina (CFM) e seus curricula vitae online no Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). Também avaliamos os mesmos parâmetros em um grupo controle de neurologistas não eletromiografistas pareados aleatoriamente por distribuição geográfica e gênero. Resultados Encontramos 469 eletromiografistas (384 neurologistas e 85 não neurologistas), com predominância do sexo masculino. Ao todo, 81,9% eram neurologistas com certificação confirmada pelo site do CFM, 49,9%, neurofisiologistas clínicos com certificação confirmada pelo site do CFM, e 10,4%, fisiatras com certificação confirmada pelo mesmo site. Entre os não neurologistas, 48,2% eram fisiatras. A maioria dos eletromiografistas atuava nos estados do Sul e do Sudeste. Quando ajustados pela população, o Distrito Federal e os estados de Mato Grosso do Sul e Goiás apresentaram a maior densidade de eletromiografistas. Os eletromiografistas não eram mais propensos a ter vínculos acadêmicos atuais/passados. Conclusão No Brasil, a eletromiografia é realizada predominantemente por neurologistas, e metade deles são neurofisiologistas clínicos com certificação confirmada pelo site do CFM. Este estudo destacou as disparidades regionais, e pode orientar ações governamentais para, por exemplo, melhorar o diagnóstico da hanseníase e o manejo das doenças neuromusculares no território brasileiro.

Repouso eletromiográfico dos músculos mastigatórios de pacientes com disfunção temporomandibular antes e após intervenção fonoaudiológica com e sem bandagem elástica / Electromyographic rest of the masticatory muscles of patients with temporomandibular disorders before and after speech therapy with and without elastic bandage / Resto electromiográfico de los músculos masticatorios de pacientes con trastornos temporomandibulares antes y después de logopedia con y sin venda elástica

Objetivo: A pesquisa tem por objetivo verificar os limiares de repouso eletromiográfico dos músculos masseter e temporal em pacientes com disfunção temporomandibular (DTM) antes e após intervenção fonoaudiológica com e sem a utilização de bandagem elástica terapêutica. Métodos: A coleta contou com 14 participantes do sexo feminino, com idade entre 18 e 40 anos, com diagnóstico de DTM muscular ou mista. As pacientes foram divididas entre dois grupos classificados em: pacientes com bandagem associada à terapia tradicional (CB) e grupo de terapia tradicional (SB). As pacientes inicialmente foram avaliadas pelo exame de eletromiografia de superfície nas situações de contração voluntária máxima e repouso, e após quatro semanas de intervenção, foi realizada nova avaliação com os mesmos instrumentos. A análise dos dados ocorreu de forma quantitativa e qualitativa. Resultados:No grupo SB o músculo masseter direito apresentou aumento dos valores de repouso com significância, foi observado que o mesmo ocorreu para todos os músculos deste grupo, influenciando no equilíbrio da musculatura ipsilateral e contralateral, no entanto sem evidência estatística. O grupo CB não demonstrou valores estatísticos significativos, porém qualitativamente os valores de repouso muscular diminuíram e equilibraram-se de forma contralateral. Conclusão: Não foram observadas mudanças estatisticamente significantes nos limiares eletromiográficos durante repouso dos músculos masseter e temporal em ambos os grupos. Qualitativamente houve aumento dos valores eletromiográficos após terapia manual tradicional em todos os músculos do grupo SB. Com relação ao grupo CB, houve diminuição dos valores do repouso eletromiográfico após terapia, embora sem evidências estatísticas. (AU)

Purpose: Objective: The research aims to verify the electromyographic rest thresholds of the masseter and temporal muscles in patients with temporomandibular disorders (TMD) before and after speech therapy intervention with and without the use of therapeutic elastic bandage. Methods: The collection included 14 female participants, aged between 18 and 40 years, who had a diagnosis of muscular or mixed TMD. The patients were divided into two groups: with traditional therapy (CB) bandage and traditional therapy (SB) only group. The patients underwent initial evaluation, as well as surface electromyography in situations of maximum voluntary contraction and rest and at the end of the four weeks of intervention, a new evaluation was performed with the same instruments. Data analysis occurred quantitatively and qualitatively. Results: In the SB group, the right masseter muscle showed a significant increase in resting values. It was observed that the same occurred for all muscles in this group, influencing the balance of the ipsilateral and contralateral muscles, although without statistical evidence. The CB group did not show statistically significant values, but qualitatively the muscle rest values decreased and balanced in a contralateral way. Conclusion: No statistically significant changes were observed in the resting electromyographic thresholds of the masseter and temporalis muscles in both groups. Qualitatively, there was an increase in electromyographic values after traditional manual therapy in all muscles in the SB group. Regarding the CB group, there was a decrease in electromyographic resting values after therapy, although without statistical evidence. (AU)

Objetivo: La investigación tiene como objetivo verificar los umbrales electromiográficos de reposo de los músculos masetero y temporal en pacientes con trastornos temporomandibulares (TMD) antes y después de la terapia del habla con y sin el uso de venda elástica terapéutica. Métodos: La colección incluyó a 14 participantes mujeres, con edades entre 18 y 40 años, diagnosticadas con TTM muscular o mixta. Los pacientes fueron divididos en dos grupos clasificados en: pacientes con vendaje asociado a terapia tradicional (CB) y grupo de terapia tradicional (SB). Los pacientes fueron inicialmente evaluados mediante electromiografía de superficie en situaciones de máxima contracción voluntaria y reposo, luego de cuatro semanas de intervención se realizó una nueva evaluación con los mismos instrumentos. El análisis de datos se llevó a cabo cuantitativa y cualitativamente. Resultados: En el grupo SB, el músculo masetero derecho presentó un aumento significativo en los valores de reposo, se observó que lo mismo ocurrió para todos los músculos de este grupo, influyendo en el equilibrio de los músculos ipsilaterales y contralaterales, sin embargo, sin evidencia estadística. El grupo CB no mostró valores estadísticamente significativos, pero cualitativamente los valores de descanso muscular disminuyeron y se equilibraron contralateralmente. Conclusión: No se observaron cambios estadísticamente significativos en los umbrales electromiográficos en reposo de los músculos masetero y temporal en ambos grupos. Cualitativamente, hubo un aumento de los valores electromiográficos después de la terapia manual tradicional en todos los músculos del grupo SB. En cuanto al grupo CB, hubo una disminución de los valores electromiográficos de reposo después de la terapia, aunque sin evidencia estadística. (AU)

Assessment of diaphragmatic function through surface electromyography in healthy individuais. A cross-section observational study

Introduction: Diaphragmatic surface electromyography is a procedure designed to assess the diaphragm. The physiological values of the electrical activity may have potential use in rehabilitation, sports training, ventilatory support withdrawal in critical care units and follow-up of respiratory disease. Objective: To assess and describe the diaphragmatic function through surface electromyography in a population of individuals during spontaneous and forced breathing. Methods: Observational, exploratory cross-sectional study including subjects with no comorbidities. Diaphragmatic surface EMG was performed measuring the mean quadratic root during tidal volume and vital capacity breathing. The body composition of the participants was also assessed. Results: 28 males and 22 females were included in the study. The mean quadratic root of the tidal volume for two minutes was 13.94 nV for females and 13.31 nV for males. The vital capacity was 23.24 nV for males and 22.4 nV for females. A correlation was identified between the mean quadratic root, weight, and body surface. Conclusions: Mean quadratic root values of tidal volume in two minutes in healthy females and males have been documented. The mean quadratic root values are correlated with the physiological and functional characteristics of the participants.

Introducción: La electromiografía de superficie diafragmática es un procedimiento para la evaluación diafragmática. Los valores fisiológicos de la actividad eléctrica tendrían aplicaciones potenciales en rehabilitación, entrenamiento deportivo, en el retiro ventilatorio en unidades de cuidado crítico y en el seguimiento a patologías respiratorias. Objetivo: Evaluar y describir la función diafragmática a través de electromiografía de superficie diafragmática en una población de sujetos durante la respiración espontánea y la respiración forzada. Métodos: Estudio observacional exploratorio de corte transversal en el que se incluyeron sujetos sin comorbilidades. Se realizó electromiografía de superficie diafragmática midiendo la raíz cuadrática media durante respiraciones de volumen corriente y capacidad vital. Adicionalmente, se valoró la composición corporal de los participantes. Resultados: Se incluyeron 28 hombres y 22 mujeres. La raíz cuadrática media de volumen corriente por dos minutos fue de 13,94 µV para mujeres y 13,31 µV para hombres, mientras que la capacidad vital fue 23,24 µV para hombres y 22,4 µV para mujeres. Se encontró una correlación entre la raíz cuadrática media, el peso y la superficie corporal. Conclusiones: Se han documentado los valores de la raíz cuadrática media de volumen corriente por dos minutos en mujeres y hombres sanos. Los valores de la raíz cuadrática media se correlacionan con características fisiológicas y funcionales de los participantes.

Assessment of electromyography in evaluating masseter muscle activity in oral submucous fibrosis with different treatment modalities: a systematic review

Electromyography (EMG) is used for the measurement of muscle activity to characterize the nature of muscle contraction in Oral submucous fibrosis (OSMF). Aim: To assess the efficacy of EMG in evaluating masseter muscle activity in the management of OSMF. This review identified 73 records from standard databases which were rigorously screened with eligibility criteria and 3 clinical studies were identified based on our inclusion criteria. The quality of included studies was assessed by the PEDro scale and data was synthesized with detailed characterization. The Risk of Bias assessment among studies was done using the ROBINS-I tool and a meta-analysis could not be done due to high clinical heterogeneity. Our result recommends that EMG be used as an objective prognosis assessment tool by quantifying the management of OSMF irrespective of the intervention applied. However, it is not to be considered the gold standard as of now with limited data pooled and needs to be further assessed with clinical trials. EMG can be advocated as a reliable adjunct assessment for measuring the interventional outcome of OSMF irrespective of treatment modalities.

La electromiografía se ha utilizado para medir la actividad muscular y caracterizar la naturaleza de la contracción muscular. Nuestra revisión sistemática tuvo como objetivo evaluar la eficacia de EMG en la evaluación de la actividad del músculo masetero en el manejo de OSMF. Esta revisión identificó 73 registros de bases de datos estándar que se revisaron rigurosamente con criterios de elegibilidad y se identificaron 3 estudios clínicos según nuestros criterios de inclusión. La calidad de los estudios incluidos se evaluó mediante la implementación de la escala PEDro y los datos se sintetizaron con una caracterización detallada. La evaluación del riesgo de sesgo entre los estudios se realizó mediante la herramienta ROBINS-I y no se pudo realizar un metanálisis debido a la alta heterogeneidad clínica. Nuestro resultado recomienda que la EMG podría utilizarse como una herramienta objetiva de evaluación del pronóstico mediante la cuantificación en el manejo de OSMF independientemente de la intervención aplicada. Sin embargo, no debe considerarse el estándar de oro a partir de ahora con datos agrupados limitados, y debe volver a evaluarse en el futuro después de la disponibilidad de ensayos clínicos extensos. A partir de ahora, la EMG se puede recomendar como un equipo de evaluación complementario confiable para medir el resultado de la intervención de la fibrosis submucosa oral, independientemente de las modalidades de tratamiento.

Confiabilidade teste-reteste de um protocolo de coleta do sinal eletromiográfico do músculo masseter em indivíduos com disfunção temporomandibular / Test-retest reliability of a protocol for recording the electromyographic signal from the masseter muscle on patients with temporomandibular disorders

Introdução: A eletromiografia (EMG) tem sido utilizada para avaliar alterações no sistema mastigatório proporcionada pela disfunção temporomandibular (DTM). Objetivos: Verificar a confiabilidade teste-reteste de um protocolo de coleta do sinal EMG do músculo masseter em indivíduos com DTM. Métodos: Estudo transversal composto por 20 indivíduos com DTM. Os testes foram realizados em duas sessões com 7 dias de intervalo. O sinal EMG foi avaliado pelas variáveis integral (iEMG) e a raiz quadrada da média do sinal (RMS). Resultados: Na análise intradia a confiabilidade para o RMS (ICC2,k: 0.85 a 0.96 ) e iEMG ICC2,k: 0.85 a 0.95) foi excelente, enquanto que a confiabilidade teste/reteste foi pobre para ambas as variáveis RMS (ICC2,1: 0.03 a 0.29) e iEMG (ICC2,1: 0.08 a 0.39). Conclusões: O protocolo de coleta do sinal EMG do músculo masseter em indivíduos com DTM demonstrou que os dados são reprodutíveis somente na mesma sessão de coletas enquanto que, para coletas em dias alternados a confiabilidade foi pobre.

Introduction: Electromyography (EMG) has been used to assess alterations in the masticatory system caused by temporomandybular disorders (TMD). Objectives: The aim of this study was to verify the test-retest reliability of a protocol for recording the EMG signal from masseter muscle in TMD patients. Methods: This is a cross-sectional study comprising 20 individuals with TMD. Tests were performed in two sessions 7 days apart. The EMG signal was evaluated by the variables integral (iEMG) and the root mean square of the signal (RMS). Results: In the intraday analysis the reliability for the RMS (ICC2,k: 0.85 to 0.96) and iEMG (ICC2,k: 0.85 to 0.95) was excellent, while the test/retest reliability was poor for both RMS (ICC2,1: 0.03 to 0.29) and iEMG (ICC2,1: 0.08 to 0.39) variables. Conclusions: The protocol for collecting the EMG signal from the masseter muscle in an individual with TMD demonstrated that the data are reproducible only in the same recording session, whereas for c recording on alternate days, the reliability was poor.

Diagnostic Contradictions in Carpal Tunnel Syndrome / Contradições diagnósticas na síndrome do túnel do carpo

Abstract Objective Given the divergence of opinions on the need for complementary tests such as ultrasonography (US) and electroneuromyography (ENMG) for the diagnosis of carpal tunnel syndrome (CTS), we aimed to elucidate which of them presents greater accuracy for the confirmation of the presence or not of this condition. Methods A total of 175 patients from a hand surgery outpatient clinic were clinically evaluated, and the results of clinical trials (Tinel, Phalen and Durkan), US (normal or altered), and ENMG (normal, mild, moderate and severe) were noted, crossed, and submitted to a statistical analysis to verify the agreement between them. Results with the sample had a mean age of 53 years, with a prevalence of female patients (159 cases). Of the patients with positive clinical test, 43.7% had normal US and 41.7% had no alterations on the ENMG. Negative results were found on the Tinel in 46.9%, on the Phalen in 47.4%, and on the Durkan in 39.7%. In the crossing between the results of the ENMG and those of the other diagnostic methods, there was little statistical agreement between them. Conclusion There was no agreement between the results of the clinical examinations, the US and the ENMG in the diagnosis of CTS, and there is no clinical or complementary examination for CTS that accurately determines the therapeutic approach. Level of Evidence IV, Case Series.

Resumo Objetivo Diante da divergência sobre a necessidade de exames complementares, como ultrassonografia (US) e eletroneuromiografia (ENMG) para o diagnóstico da síndrome do túnel do carpo (STC), objetivamos elucidar qual deles apresenta maior precisão na confirmação da presença ou não desta afecção. Métodos Um total de 175 pacientes de um ambulatório de cirurgia da mão foram avaliados clinicamente, e os resultados dos testes clínicos (Tinel, Phalen e Durkan), da US (normal ou alterada) e da ENMG (normal, leve, moderada e grave) foram anotados, cruzados, e submetidos a análise estatística para verificar a concordância entre eles. Resultados A idade média da amostra era de 53 anos, sendo prevalente o sexo feminino (159 casos). Dos pacientes com teste clínico positivo, 43,7% apresentavam US normal, e 41,7%, ENMG sem alterações. Foram encontrados resultados negativos no Tinel em 46,9% no Phalen em 47,4%, e no Durkan em 39,7%. No cruzamento entre a ENMG e os demais métodos diagnósticos, houve pouca concordância estatística. Conclusão Não houve concordância entre os resultados dos exames clínicos, da US e da ENMG no diagnóstico da STC, e não há exame clínico ou complementar para STC que determine a conduta terapêutica com precisão. Nível de Evidência IV, Série de Casos.

The potential applicability of facial nerve monitoring as a navigation tool in parotid gland surgery

Abstract Objectives: The aim of this study was to assess the relationship between the stimulation amplitude and the distance to the facial nerve. Methods: This study was designed as a prospective clinical study. A total of 20 patients (12 males, 8 females) were included. Partial superficial parotidectomy was performed in all patients with intraoperative facial monitoring. Measurements were made on the main trunk and major branches. Stimulation was started at 1 mA and incrementally increased to 2 and 3mA's. The shortest distance creating a robust response (>100mV) was recorded. Results: At 1 mA, 2 mA and 3 mA stimulation intensity, the average distance between the tip of the stimulation probe and the main trunk was 2.20±0.76 mm (range 1-3 mm), 3.80±0.95 mm (range 2-5 mm), 4.80±1.05 mm (range 3-7 mm) respectively. The stimulus intensity was inversely proportional in respect to the distance between the nerve and the tip of the stimulus probe (P < .00). The same relation was present in the facial nerve major branch measurements (P < .00). Conclusion: The proportional stimulation amplitude and distance to the facial nerve is thought to be a reliable auxillary method to assist the surgeon by facilitating the estimation of the distance to the facial nerve during extracapsular dissection and minimally invasive cases where the facial nerve isn't routinely dissected. Level of evidence: Level 3.

Neuropathy in multiple sclerosis patients treated with teriflunomide

SUMMARY OBJECTIVE: Teriflunomide is an oral medication approved for the treatment of patients with multiple sclerosis. The primary effect of teriflunomide is to reduce de novo pyrimidine synthesis by inhibiting mitochondrial dihydroorotate dehydrogenase, thereby causing cell-cycle arrest. We aimed to investigate the occurrence of peripheral neuropathy, a rare side effect of teriflunomide, in patients receiving teriflunomide. METHODS: Multiple sclerosis patients receiving teriflunomide (n=42) or other disease modifying therapies (n=18) and healthy controls (n=25) were enrolled in this cross-sectional study between January 2020 and 2021. The mean duration of teriflunomide treatment was 26 months (ranging from 6 to 54 months). All participants underwent neurological examination and nerve conduction studies of tibial, peroneal, sural, superficial peroneal, median, and ulnar nerves by using surface recording bar and bipolar stimulating electrodes. RESULTS: The mean superficial peroneal nerve distal latency and conduction velocity were significantly slower, and the mean superficial peroneal nerve action potential amplitude was lower in patients using teriflunomide (2.50 ms, p<0.001; 47.35 m/s, p=0.030; and 11.05 μV, p<0.001, respectively). The mean peroneal motor nerve distal latency was significantly longer and amplitude was lower in teriflunomide patients (3.68 ms, p<0.001, and 5.25 mV, p=0.009, respectively). During the study period, treatment switching to another disease-modifying therapy was planned in 10 patients, and all neuropathic complaints were reversed after switching. CONCLUSION: Teriflunomide has the potential to cause peripheral neuropathy. The awareness of peripheral neuropathy, questioning the symptoms, and if suspected, evaluation with electromyography and switching the therapy in patients under teriflunomide treatment are crucial.

Electromyographic analysis of suprahyoid musculature before and after therapy taping in young women

ABSTRACT Purpose: to compare the effects of a tongue coupling program with and without therapy taping on suprahyoid muscles in young women. Methods: participants were 14 women aged 19 to 25 years, allocated into two groups. The Experimental Group did 15-second tongue coupling in combination with tape use without tension, while the Control Group only did tongue coupling. Electromyography was used to analyze the suprahyoid muscles before, during, and after training, at rest, in maximum voluntary contraction, and in swallowing. The domains of amplitude and frequency of the electromyography signal were considered, in situations before, after and during the intervention, after which, the therapy taping appreciation questionnaire was administered. The chi-square test was used for clinical variables, Student's t-test, Wilcoxon test, and Mann-Whitney U test were used to compare before and after the intervention, and the Friedman ANOVA test was used for the training. The significance level was set at 5%. Results: no statistically significant differences were found in muscle activity when comparing values before and after the intervention at rest and in swallowing in either group or between them. However, there was a general increase in maximum voluntary contraction in both regions, in both groups. There were positive impressions regarding tape use. Conclusion: this approach in this population did not interfere with muscle activity, although there were positive qualitative results regarding the perception of the stimulated area.

Comparison of muscular activity on ergometric bicycle and elliptical trainer in subjects with incomplete spinal cord injury / Comparação da atividade muscular em bicicleta ergométrica e aparelho elíptico em indivíduos com lesão medular incompleta

Abstract Introduction Spinal cord injury generates muscle weakness, impairing orthostatism and gait. The elliptical trainer (ET) and the ergometric bicycle (EB) are rehabilitation options for this subject. Understanding the pattern of muscle activation generated by these methods is important to answer questions arising from clinical practice. Objective To verify muscle activation with ET and EB with and without electromyographic biofeedback in subjects with incomplete spinal cord injury (ISCI). Methods Cross-sectional crossover study, enrolled in Clinical Trials (NCT05118971). Subjects with spinal cord injury (incomplete spinal cord injury group - ISCIG) and without spinal cord injury (reference group - RG) were randomized into four groups: elliptical group (EG), elliptical + biofeedback group (EBG), bicycle group (BG) and bicycle + biofeedback group (BBG). Subjects were assessed for functionality by the Functional Independence Measure, injury classification by the ASIA Scale, muscle tone by the modified Ashworth scale, and muscle activity by electromyography. Results There was greater activation of the tibialis anterior on cycling compared to other modalities in ISCIG. Biofeedback offered no difference in any of the groups. In RG the vastus medialis was the most activated muscle in all modalities, with more expressive activation in the ET. In this same group, the tibialis anterior was more activated on the EB. Conclusion This study showed that both ET and EB are safe and effective in recruiting the muscles investigated, encouraging its use by rehabilitation professionals when the objective is to strength muscles involved in gait.

Resumo Introducão A lesão medular gera fraqueza muscular, preju-dicando o ortostatismo e a marcha. O aparelho elíptico (EL) e a bicicleta ergométrica (BE) são opções de reabilitação para estes sujeitos. Compreender o padrão de ativação muscular gerado por esses métodos é importante para esclarecer dúvi-das advindas da prática clínica. Objetivo Verificar a ativação muscular com EL e BE com e sem biofeedback eletromiográfico em indivíduos com lesão medular incompleta (LMI). Métodos Estudo transversal do tipo crossover, inscrito no Clinical Trials (NCT05118971). Sujeitos com lesão medular (grupo lesão medular incompleta - GLMI) e sem lesão medular (grupo refe-rência - GR) foram randomizados em quatro grupos: elíptico (GE), elíptico + biofeedback (GEB), bicicleta (GB) e bicicleta + biofeedback (GBB). Os indivíduos foram avaliados quanto à funcionalidade pela Medida de Independência Funcional, classificação da lesão pela Escala ASIA, tônus muscular pela escala modificada de Ashworth e atividade muscular por eletromiografia. Resultados Houve maior ativação do tibial anterior no ciclismo em comparação com outras modalidades no GLMI. O biofeedback não ofereceu nenhuma diferença em nenhum dos grupos. No GR, o vasto medial foi o músculo mais ativado em todas as modalidades, com ativação mais expressiva no EL. Neste mesmo grupo, o tibial anterior foi mais ativado na BE. Conclusão Este estudo mostrou que tanto o EL quanto a BE são seguros e eficazes no recrutamento dos músculos investigados, incentivando seu uso por profissionais da reabilitação quando o objetivo é fortalecer os músculos envolvidos na marcha.

Influence of the spring constant change on the electromyography activity of muscles of the powerhouse and shoulder during the long stretch exercise / Influencia del cambio de la constante elástica de las muelles en la actividad electromiográfica de los músculos del powerhouse y del hombro durante el ejercicio de long stretch / Influência da mudança na constante elástica da mola na atividade eletromiográfica de músculos do powerhouse e do ombro durante o exercício de long stretch

ABSTRACT This study aimed to verify the effect of the spring constant change on the electromyographic activity of the powerhouse and shoulder muscles during the long stretch exercise. In total, 15 Pilates practitioners performed the Long Stretch exercise on the reformer with three different spring constants: (1) k=0.19kg/cm with 1 red spring; (2) k=0.27kg/cm with 1 red spring and 1 yellow; and (3) k=0.38kg/cm with 2 red springs. The Electromyographic activity of Rectus Abdominis (RA), External Oblique (EO), Internal Oblique/Transversus abdominis (OI/TS), Multifidus (MU), Iliocostalis (IC), Longissimus (LG), Lower Trapezius (LT), and Anterior Deltoid (AD) were evaluated. We observed that as the spring constant increases, the RA, OE, OI/TS muscles decrease their EMG activity, while the AD, LT, and LG increase their EMG activity. The MU and IC muscles were not influenced in their EMG activities. Therefore, we observed an influence of the change of the spring constant on the electromyographic activity of the RA, OE, OI/LG, AD, and LT muscles. However, we found no influence of the spring constant on the EMG activities of the MU and IC muscles during the long stretch.

RESUMEN El objetivo de este estudio fue evaluar el efecto del cambio de la constante de la muelle en la actividad electromiográfica (EMG) de los músculos del powerhouse y del hombro durante el ejercicio de long stretch. En el estudio participaron quince practicantes de pilates que realizaron el ejercicio long stretch en el reformer con tres constantes elásticas: (1) k=0,19kg/cm, representado por 1 muelle roja; (2) k=0,27kg/cm, representado por 1 muelle roja y 1 muelle amarilla; y (3) k=0,38kg/cm, representado por 2 muelles rojas. Se evaluaron las actividades EMG de los músculos recto abdominal (RA), oblicuo externo (OE), oblicuo interno/transverso (OI/TS), multífidos (MU), iliocostal (IC), longuissimus (LG), deltoides anterior (DA) y trapecio inferior (TI). Se pudo observar que a medida que aumenta la constante elástica de la muelle, los músculos RA, OE, OI/TS disminuyen su actividad EMG, mientras que los músculos DA, TI y LG aumentan su actividad EMG. Los músculos MU e IC no fueron influenciados en sus actividades EMG. Se puede concluir que hubo influencia del cambio en la constante elástica de la muelle sobre la actividad EMG de los músculos RA, OE, OI/TS, LG, DA y TI durante el long stretch, pero no hubo influencia en las actividades EMG de los músculos MU e IC.

RESUMO O objetivo deste estudo é verificar o efeito da mudança da constante elástica na atividade eletromiográfica (EMG) dos músculos do powerhouse e do ombro durante o exercício de long stretch. Participaram da pesquisa 15 praticantes de Pilates que executaram o exercício de long stretch no reformer com três constantes elásticas: (1) k=0,19kg/cm, representado por uma mola vermelha; (2) k=0,27kg/cm, representado por uma mola vermelha e uma mola amarela; e (3) k=0,38kg/cm, representado por duas molas vermelhas. Foram avaliadas as atividades EMGs dos músculos reto abdominal (RA), oblíquo externo (OE), oblíquo interno/transverso (OI/TS), multífidos (MU), iliocostal (IC), longuíssimo (LG), deltoide anterior (DA) e trapézio inferior (TI). Pode-se observar que, conforme a constante elástica aumenta, os músculos RA, OE, OI/TS diminuem suas atividades EMG, enquanto os músculos DA, TI e LG as aumentam. Os músculos MU e IC não foram tiveram suas atividades EMG influenciadas. Portanto, conclui-se que houve influência da mudança da constante elástica sobre as atividades EMG dos músculos RA, OE, OI/TS, LG, DA e TI durante o long stretch, mas não nas atividades EMG dos músculos MU e IC.

Removable dentures and electrical activity of masticatory muscles in individuals with Parkinson's disease

ABSTRACT Purpose: to assess the influence of dentures on the electromyographic activity of masticatory muscles in individuals with Parkinson's disease. Methods: an analytical, quantitative, cross-sectional study conducted at a public teaching hospital in 2017, assessing the stage of the disease, non-denture (ND) wearing, upper removable partial denture wearing (DW1), upper and lower removable partial denture wearing (DW2), and upper complete denture + lower removable partial denture wearing (DW3). The Student-Newman-Keuls test was used to compare the maximum voluntary muscle contraction between sides and between the denture wearing and non-denture wearing groups. Significance was set at α<0.05. Results: after applying the eligibility criteria, 41 patient records were included in the sample. The association between the stage of the disease and denture wearing showed predominance of DW2 in stage 1 (43%). A significant difference was found in the masseter muscle analysis between the non-denture wearing group and DW2 and DW3 (p=0.0018). As for the anterior temporalis muscle, there was a significant difference (p=0.0034) in three of the analysis groups (ND vs. DW2, ND vs. DW3, and DW1 vs. DW3). Conclusion: denture wearing has a negative impact on the electrical activity of masticatory muscles when compared with individuals who do not wear dentures and have natural teeth.

Correlação entre achados da avaliação clínica miofuncional orofacial, a pressão e a atividade eletromiográfica da língua na deglutição em indivíduos com diferentes alterações da motricidade orofacial / Correlation between findings of the oral myofunctional clinical assessment, pressure and electromyographic activity of the tongue during swallowing in individuals with different orofacial myofunctional disorders

RESUMO Objetivo correlacionar os achados da avaliação clínica miofuncional orofacial, pressão de língua e da eletromiografia de superfície (EMGs) da deglutição de grupos de pacientes com diferentes alterações da motricidade orofacial. Método 44 pacientes (20 homens e 24 mulheres com idades entre 17 e 63 anos), com diferentes alterações miofuncionais orofaciais foram avaliados por meio da Avaliação Miofuncional Orofacial com Escores Expandido (AMIOFE-E), avaliação da amplitude mandibular e antropometria facial, mensuração da pressão de língua (ponta e dorso) e exame de Eletromiografia de Superfície (EMGs) em região supra hioidea na tarefa de deglutição de saliva e diferentes volumes de água. Resultados a análise estatística encontrou algumas correlações fracas que envolvem a pressão do dorso de língua e sugerem que quanto maior for a medida do terço inferior, menor será a pressão do dorso da língua; quanto maior for a medida dos trespasses (vertical e horizontal) maior será a pressão do dorso da língua; quanto maior for a pontuação da avaliação de postura e funções orofaciais, maior será a pressão do dorso de língua e quanto maior for a pressão do dorso de língua, maior será a pressão da ponta da língua. Conclusão os resultados sugerem que as alterações miofuncionais orofaciais encontradas nos diferentes grupos de pacientes estão mais relacionadas às discrepâncias maxilomandibulares do que às patologias pesquisadas no presente estudo.

ABSTRACT Purpose To correlate the findings regarding the myofunctional orofacial examination, tongue pressure and surface electromyography (sEMG) of deglutition in individuals with different orofacial myofunctional disorders. Methods 44 patients (20 males and 24 females, aged between 17 and 63 years old) with different orofacial myofunctional changes were clinically assessed using the Expanded Protocol of Orofacial Myofunctional Evaluation with Scores (OMES-E). In addition, the range of mandibular movements and facial anthropometry were measured, along with the assessment of the tongue pressure (tip and dorsum) and of the electrical activity of the suprahyoid muscles during deglutition, using surface electromyography (sEMG). Results The statistical analysis found weak correlations between tongue dorsum pressure values, suggesting that the greater the measurement of the lower third of the face, the lower the pressure of the tongue dorsum; the greater the measurement of the overlaps (vertical and horizontal), the higher the pressure of the tongue dorsum; the higher the score from the orofacial evaluation and orofacial functions assessment, the higher the pressure of the tongue dorsum; and the higher the pressure of the tongue dorsum, the higher the pressure of the tongue tip. Conclusion The present study results indicate that the orofacial myofunctional changes found in different groups of patients are more related to the maxillomandibular discrepancies than to the pathologies investigated herein.