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Pesqui. bras. odontopediatria clín. integr ; 22: e210131, 2022. tab, graf
Article in English | LILACS, BBO | ID: biblio-1365225


Abstract Objective: To analyze and compare changes of quality of life parameter among dental patients rehabilitated by the implant-supported overdentures with different attachment systems. Material and Methods: Forty-eight patients were recruited as a study cohort. The implant placement procedure was based on the results obtained by CBCT scanning and individualized surgical templates manufactured for correct implant placement. Each individual received two k3Pro Implants (Sure Type with 4.0 or 4.5 mm in diameter) at the intraforaminal area due to standard protocol of implantation provided by the manufacturer under local anesthesia. All patients were distributed between two groups based on the fact of using either Locator- or ball-attachments. Rank correlation was measured using Spearman correlation coefficient, while linear correlation was evaluated by Pearson correlation coefficient. Results: No statistically meaningful differences were noted regarding patients' distribution among groups considering age (p>0.05) and gender (p>0.05). Provided patient-level analysis demonstrated that increase of conventional full denture service time was positively correlated with escalation of OHIP-EDENT scores. The most prominent inter-correspondences were noted specifically between longevity of denture service and elevation of scores within "Functional limitation" (r=0.61; p<0.05), "Physical pain" (r=0.51; p<0.05) and "Physical disability" (r=0.57; p<0.05) subdomains. No statistically argumented regressions were noted between increase tendency of OHIP-EDENT scores and gender (p>0.05) or age (p>0.05) parameters. Conclusion: Significant improvements of quality of life measured with OHIP-EDENT were noted for both types of attachments compared to the pre-treatment situation independently of additionally provided surface electromyography-based alignment.

Humans , Male , Female , Middle Aged , Aged , Aged, 80 and over , Quality of Life , Dental Prosthesis, Implant-Supported/instrumentation , Electromyography/instrumentation , Masticatory Muscles , Ukraine , Surveys and Questionnaires , Regression Analysis , Cohort Studies , Statistics, Nonparametric , Occlusal Adjustment , Adaptation to Disasters , Dental Implantation , Denture, Complete , Denture, Overlay
Adv Rheumatol ; 60: 31, 2020. tab, graf
Article in English | LILACS | ID: biblio-1130800


Abstract Introduction Evaluating small nerve fibers in patients with systemic lupus erythematosus (SLE) using cutaneous silent period (CSP) and skin biopsy and assesssing the relationship between clinical signs, autoantibodies and neuropathic pain score. Objective - methods Fifty one SLE patients and 46 healthy volunteers were included in this study. Nerve conduction studies and CSP were performed both on upper and lower limbs in subjects. Skin biopsy was performed and the number of epidermal nerve density and IL-6 staining were evaluated. Results In SLE patients, CSP latencies were significantly prolonged both in lower and upper limbs and lower and upper extremity CSP durations were significantly shorter when compared to controls ( p < 0.001). The number of epidermal nerve was significantly lower in SLE patients when compared to healthy controls ( p < 0.001). Conclusion We detected marked small nerve fiber damage in both lower and upper limbs in SLE patients using CSP. Decreased epidermal nerve density also supports this finding.(AU)

Humans , Small Fiber Neuropathy/etiology , Lupus Erythematosus, Systemic/physiopathology , Skin Diseases/pathology , Electromyography/instrumentation , Small Fiber Neuropathy/diagnostic imaging
Adv Rheumatol ; 60: 28, 2020. tab, graf
Article in English | LILACS | ID: biblio-1130791


Abstract Background: Rheumatoid arthritis (RA) is an inflammatory and chronic autoimmune disease that leads to muscle mass loss and functional capacity impairment, potentiated by physical inactivity. Despite evidences demonstrate neuromuscular impairments in RA patients, aging effects may have masked the results of similar previous studies. The aim of study was to verify (i) the effects of RA on functional capacity and muscle properties in middle-aged patients and (ii) the association between age, clinical characteristics, quadriceps muscle properties and functional capacity. Methods: Thirty-five RA women and 35 healthy age-matched women were compared with the following outcomes: (i) physical activity level through the International Physical Activity Questionnaire (IPAQ); (ii) timed-up and go (TUG) test; (iii) isometric knee extensor muscular strength; and (iv) vastus lateralis muscle activation and muscle architecture (muscle thickness, pennation angle and fascicle length) during an isometric test. An independent Student t-test and partial correlation (controlled by physical activity levels) were performed, with p < 0.05. Results: Compared with healthy women, RA presented (i) lower physical activity level (- 29.4%; p < 0.001); (ii) lower isometric knee extensor strength (- 20.5%; p < 0.001); (iii) lower TUG performance (- 21.7%; p < 0.001); (iv) smaller muscle thickness (- 23.3%; p < 0.001) and pennation angle (- 14.1%; p = 0.011). No differences were observed in muscle activation and fascicle length. Finally, the correlation demonstrated that, with exception of TUG, muscle strength and muscle morphology were not associated with age in RA, differently from healthy participants. Conclusion: Middle-aged RA patients' impairments occurred due to the disease independently of the aging process, except for functional capacity. Physical inactivity may have potentiated these losses.(AU)

Humans , Female , Arthritis, Rheumatoid/physiopathology , Muscular Atrophy , Exercise , Electromyography/instrumentation , Quadriceps Muscle , Muscle Strength
Acta cir. bras ; 34(3): e201900304, 2019. tab
Article in English | LILACS | ID: biblio-989064


Abstract Purpose: To evaluate if the type of electrode (needle vs. surface) affects the electromyoneurography parameters in rats. Methods: Twenty male rats were anesthetized, then compound muscle action potential were recorded using a Neuropack S1 MEB- 9400©. All animals were submitted to two electroneuromyography analysis: first with surface electrode and then by needle electrode. We evaluated the latency, amplitude, duration and area of the negative peak of the gastrocnemius and cranial tibial muscles. Results: There were no significant differences between the groups in the mean of duration, latency, amplitude or area of the negative peak in gastrocnemius and cranial tibial muscles. Conclusion: The type of electrode does not affect the electroneuromyography parameters.

Animals , Male , Rats , Action Potentials/physiology , Muscle, Skeletal/physiology , Electrodes , Electromyography/instrumentation , Neural Conduction/physiology , Reaction Time , Rats, Wistar
Acta fisiátrica ; 24(4): 186-192, dez. 2017.
Article in English, Portuguese | LILACS | ID: biblio-968624


A alteração na temperatura de um tecido pode promover efeitos fisiológicos que levam a alterações circulatórias e nervosas, tais como vasodilatação e aumento na flexibilidade. Objetivo: Avaliar, através de uma avaliação neuromuscular não invasiva, como a termoterapia influencia na força muscular e nos sinais mioelétricos do bíceps braquial em contração isométrica. Métodos: Dezessete voluntários foram orientados a fazer contração isométrica do músculo bíceps braquial concomitantemente com a eletromiografia de superfície. A avaliação eletromiográfica e de força foram realizadas antes e após a intervenção com recursos termoterapêuticos: gelo (15 minutos) e ultrassom continuo (1MHz, 0.8W/cm2, 7 minutos). Resultados: Mostraram que as mulheres possuem menos força e ativam menos unidades motoras. No entanto, a frequência de disparos elétricos nas vias efetoras é maior, o que indica maior propensão à fadiga. Após a aplicação do calor, não foram observadas diferenças na resposta neuromuscular do bíceps braquial em contração. Já a crioterapia, promoveu redução significativa na força e no número de unidades motoras ativadas durante a contração. O resfriamento do tecido muscular promove a diminuição da ação das fibras musculares, uma vez que há redução da velocidade da condução do impulso nervoso e do reflexo do arco miotático. Além disso, a crioterapia também diminui a sensibilidade dos órgãos tendinosos de Golgi, aumenta a viscosidade sanguínea, provoca a vasoconstrição. Todos estes fatores, somam-se para culminar na diminuição da ativação neuromuscular e, consequentemente, na redução da força do músculo

The change in temperature of a biological tissue can promote physiological effects that lead to circulatory and nerve changes, such as vasodilation and increased flexibility. Objective: The objective of this study was to evaluate, through a noninvasive neuromuscular assessment, how thermotherapy influences the muscular strength and the myoelectric signals of the biceps brachial in isometric contraction. Methods: Seventeen volunteers were instructed to perform isometric contraction of the brachial biceps muscle concomitantly with surface electromyography. Electromyographic and force evaluation were performed before and after the intervention with thermotherapeutic resources that consisted of ice therapy for 15 minutes and continuous ultrasound (1MHz, 0.8W/cm2) for 7 minutes. Results: Women have less strength and fewer motor units. However, the frequency of electric inputs of the effector pathways is higher, which indicates a greater propensity to fatigue. After the application of heat, no differences were observed in the neuromuscular response of the contracting brachial biceps. The cryotherapy, however, promoted a significant reduction in the strength and number of motor units activated during the contraction. Conclusion: The cooling of muscle tissue promotes a decrease of muscle fibers activities, since there is a reduction in the velocity of nerve impulse conduction and the reflex of the myotatic arch. In addition, cryotherapy also decreases the sensitivity of the Golgi tendon organs, increases blood viscosity, and causes vasoconstriction. All these factors are combined to culminate in the decrease of neuromuscular activation and, consequently, in the reduction of muscle strength

Humans , Ultrasonic Therapy/instrumentation , Cryotherapy/instrumentation , Electromyography/instrumentation , Muscle Strength , Isometric Contraction
Acta fisiátrica ; 24(4): 200-206, dez. 2017.
Article in English | LILACS | ID: biblio-968632


Carpal Tunnel Syndrome is the most common compressive neuropathy in the general population, and it may lead to disabling symptoms and significant functional limitation. This systematic review covered Pubmed, Medline, Embase, Cochrane, CINAHL, LILACS, and SCIELO databases, with no time or language delimitations. The PICO strategy defined the search strategy with keywords extracted from the Medical Subjects Headings, and the quality of the studies was evaluated by the Agency for Healthcare Research and Quality (AHRQ) scale. Overall, 857 studies were identified, of which only 10 fulfilled the inclusion criteria. Despite the good results shown, a noticeable heterogeneity was observed among the studies included, associated with methodological discrepancy and to limited sample size in a few of them. Four studies showed no correlation between electrophysiological findings and clinical symptoms and signs, whereas three could demonstrate such association and other three studies had equivocal results. Other studies are necessary, with better methodological standards and more homogeneous and precise evaluations, so as to improve the level of scientific evidence

A síndrome do Túnel do Carpo é a neuropatia compressiva mais frequente na população geral que pode levar a sintomas incapacitantes e significativa limitação funcional. Uma revisão sistemática foi realizada nas bases de dados Pubmed, Medline, Embase, Cochrane, CINAHL, LILACS e SCIELO, sem delimitação de tempo ou idioma. Utilizou-se da estratégia PICO para a pesquisa, palavras-chave extraídas dos Descritores de Ciências da Saúde (Decs) e a qualidade dos estudos foi avaliada através da escala Agency for Healthcare Research and Quality (AHRQ). Identificaram-se 857 estudos dos quais, somente 10 obedeceram aos critérios de inclusão. Apesar dos bons resultados apresentados, verificou-se uma expressiva heterogeneidade existente entre os estudos incluídos, associado à discrepância metodológica, e um limitado tamanho amostral em alguns deles. São necessários estudos com melhor padrão metodológico, bem como avaliações mais homogêneas e precisas, a fim de melhorar o nível de evidência científica

Humans , Carpal Tunnel Syndrome/physiopathology , Median Neuropathy , Electrodiagnosis/instrumentation , Electromyography/instrumentation , Neural Conduction
Acta fisiátrica ; 24(2): 77-81, jun. 2017.
Article in English, Portuguese | LILACS | ID: biblio-906909


Polirradiculopatia inflamatória, aguda, de caráter progressivo, a Síndrome de Guillain Barré normalmente acontece pós exposição a um agente infeccioso, ou a um estímulo, desencadeando o comprometimento dos motoneurônios periféricos. Objetivo: Comparar alterações eletrofisiológicas com ganhos funcionais na SGB, observando a relação entre prognóstico e alteração no exame eletroneuromiográfico e verificando a condição dos pacientes após um ano do início do quadro clínico. Métodos: Revisão de prontuários dos pacientes atendidos no Centro de Reabilitação e Readaptação Dr. Henrique Santillo ­ CRER, no período de 2008 a 2014. Resultados: Inicialmente localizados quarenta e oito casos, destes apenas dezenove, inicialmente, foram selecionados por terem estado internados no CRER no período selecionado para o estudo, houve exclusão de um paciente por não constar em prontuário o resultado da eletroneuromiografia, permanecendo na pesquisa, então, dezoito pacientes. Conclusão: A reabilitação tem um papel fundamental no resultado final e cuidados ao longo prazo em pacientes que tiveram SGB, sendo um trabalho diferenciado a internação em centro de reabilitação melhorando a capacidade de diminuir os danos causados pela doença, independente dos déficits funcionais adquiridos. Os dados apontaram que os ganhos funcionais ao longo de um ano após início da doença, não têm relação direta com o que é encontrado no exame eletroneuromiográfico

Progressive acute inflammatory polyradiculopathy, Guillain Barré syndrome (GBS) is commonly associated to a post exposition to an infectious agent or a stimulus, thereby compromising peripheral motor neurons. Objective: The objective is to compare electrophysiological changes with functional improvements of GBS on the relation between prognosis and alterations of the electroneuromyography assessment, and to evaluate patients after one year of onset GBS. Methods: Retrospective study based on medical reports of the Centro de Reabilitação e Readaptação Dr. Henrique Santillo ­ CRER of patients registered from 2008 to 2014. Results: Forty-eight cases were found, nineteen reports were selected, once they attended the time period criteria. One of these was excluded due to lack of electroneuromyography data, therefore data of eighteen patients were analyzed. Conclusion: Rehabilitation is substantial in the final results and in the long term of patients with GBS, whereas rehabilitation program for hospitalized patients is a distinctive work to diminish the losses imposed by GBS, regardless of the functional deficits. The data have shown that the functional improvements acquired one year after GBS onset have no evident relation to what is found in electroneuromyography

Humans , Rehabilitation Centers , Guillain-Barre Syndrome/rehabilitation , Electromyography/instrumentation , Retrospective Studies , Longitudinal Studies , Observational Study
Acta fisiátrica ; 23(3): 130-134, set. 2016.
Article in English, Portuguese | LILACS | ID: biblio-848946


A Síndrome da Dor Femoropatelar (SDFP) tem como uma das causas a lateralização excessiva da patela, que ocorre frequentemente pelo enfraquecimento do músculo Vasto Medial (VM). Dessa forma, na prevenção e reabilitação da SDFP, o fortalecimento de VM é imprescindível. Objetivo: Comparar o nível de ativação do VM em quatro diferentes exercícios utilizados na prevenção e na reabilitação da SDFP compreendendo isometria de extensão de joelhos a 30° e 60° e isometria no agachamento a 60° associado ou não a adução de quadril. Métodos: A amostra foi de 14 sujeitos saudáveis sedentários, com idade entre 20 e 40 anos. O sinal EMG do músculo VM foi coletado durante Contração Isométrica Voluntária Máxima (CIVM) com duração de cinco segundos para cada exercício. Do sinal EMG captado foi recortado um período de três segundos e a partir disso foram obtidos os valores Root Mean Square (RMS) para cada exercício. Resultados: Demonstram que houve ativação do VM significativamente maior nos exercícios de extensão quando comparados com os exercícios de agachamento. Porém, não houve diferença significativa entre os dois exercícios de extensão, assim como entre os exercícios de agachamento. Conclusão: Os melhores exercícios para maximizar a ativação do VM são os exercícios isométricos de extensão do joelho, independente do ângulo avaliado, pois apresentam maior nível de ativação do VM, imprescindível para a prevenção e reabilitação da SDFP

Excessive lateralization, which often occurs by the weakening of Vastus Medialis (VM) muscle of the patella, is one of the causes of Patellofemoral Pain Syndrome (PFPS) For prevention and rehabilitation of PFPS, the VM strength is essential. Objective: The aim of the study was to compare the VM activation level in four different exercises used in the prevention and rehabilitation of PFPS that are isometric knee extension at 30° and 60° and isometric squat at 60° with or without hip adduction. Methods: A sample of 14 sedentary healthy subjects, aged between 20 and 40 years was included. The EMG signal of VM muscle was collected during Maximal Voluntary Isometric Contraction with duration of five seconds for each exercise. From the captured EMG signal, a period of three seconds was cut and thereafter the Root Mean Square value for each exercise was obtained. Results: The results showed that there was significantly greater activation in VM extension exercises compared to squat exercises. However, there was no significant difference between the two extension exercises, as well as between squat exercises. Conclusion: It can be concluded that the best exercises to maximize the activation of the VM are the isometric knee extension, regardless of the rated angle, since they have greater VM activation level, essential for the prevention and rehabilitation of PFPS

Humans , Patellofemoral Pain Syndrome/pathology , Electromyography/instrumentation , Quadriceps Muscle
Acta fisiátrica ; 23(2): 102-106, jun. 2016. ilus
Article in English, Portuguese | LILACS | ID: biblio-848809


Este relato de caso descreve um programa de fisioterapia aquática para uma criança com distrofia muscular congênita (DMC) merosina negativa. Objetivo: Verificar a interferência da fisioterapia aquática na velocidade e no índice de gasto energético durante o deslocamento sentado em superfície plana, e no alcance funcional com os membros superiores devido a fraqueza proximal que acomete estes pacientes visando maior independência. Métodos: Como instrumentos de avaliação foram utilizados a Medida da Função Motora (MFM); o Functional Reach Test (FRT); foi verificado o Índice de Gasto Energético (IGE) no deslocamento sentado; assim como o tempo gasto neste deslocamento e a ativação muscular com a eletromiografia (EMG). O programa durou 12 semanas e a intervenção incluiu atividades para melhorar a mobilidade e a agilidade no deslocamento sentado e o alcance na postura sentada. Resultados: Na MFM a variação no escore das duas dimensões (D2 e D3) focadas na terapia foi de 6,8%. O alcance funcional melhorou 16 centímetros (cm) e o tempo do deslocamento sentado diminuiu 19 segundos (s). O gasto energético diminuiu 252,31 batimentos por minuto (bpm). Conclusão: A fisioterapia aquática foi eficaz para melhora da agilidade no deslocamento sentado e na funcionalidade de membros superiores (MMSS) de uma criança com DMC merosina negativa

This case report describes an aquatic therapy program for a child with Merosin-Deficient Congenital Muscular Dystrophy. Objective: This study sought to investigate the effect of aquatic physical therapy on the speed and the rate of energy expenditure while moving around on a flat surface, in addition to the functional reach of the upper limbs suffering from the proximal weakness that affects these patients seeking greater independence. Methods: The Motor Function Measurement (MFM) and the Functional Reach Test (FRT) were used as assessment tools; the Energy Expenditure Index (EEI) was measured in seated locomotion, as well as the time spent, and muscle activation was measured via electromyography (EMG). The program lasted 12 weeks and included activities to improve mobility and agility as well as reaching from the seated position. Results: In the MFM the change in the score of the two dimensions (D2 and D3) that the treatment focused on was 6.8%. The functional reach improved by 16 centimeters (cm) and the amount of time moving while sitting decreased by 19 seconds (s). Energy expenditure decreased by 252.31 beats per minute (bpm). Conclusion: The aquatic physical therapy was effective for agility improvement in seated locomotion and upper limb functionality of a 6-year-old child with Merosin-Deficient Congenital Muscular Dystrophy

Humans , Electromyography/instrumentation , Hydrotherapy/instrumentation , Muscular Dystrophies/physiopathology , Muscular Dystrophies/rehabilitation
Acta fisiátrica ; 22(3)set. 2015.
Article in Portuguese | LILACS | ID: lil-775883


O basquete em cadeira de rodas (BCR) segue praticamente as mesmas regras do basquete convencional (BC). Objetivo: Avaliar a ativação eletromiográfica dos músculos peitoral maior (PM), deltóide anterior (DA) e tríceps braquial (TB) durante o arremesso em atletas de BC e BCR. Método: Estudo transversal, no qual onze sujeitos foram submetidos a uma avaliação eletromiográfica dos músculos PM, DA, TB no membro que realiza o arremesso. Foi utilizado um eletromiógrafo de 4 canais (Miotec/Brasil) (2000Hz/canal). Resultados: Na comparação entre os músculos, o grupo BC mostrou diferença significativa, sendo observada maior ativação do músculo DA em relação aos demais, já no grupo BCR, não houve diferença. Na comparação entre os grupos, o músculo PM mostrou maior ativação no grupo BCR, enquanto o músculo DA estava mais ativo no grupo BC. O músculo TB não apresentou diferença significativa entre os grupos. Conclusão: A partir dos resultados do presente estudo os atletas dos grupos BC e BCR apresentaram diferenças na ativação elétrica durante o movimento do arremesso. Entretanto ambos os grupos ativaram mais o DA, seguido do TB e o músculo menos ativado foi o PM, sendo estas diferenças mais visíveis no grupo BC.

Wheelchair Basketball (WB) follows almost the same rules as Conventional Basketball (CB). Objective: Evaluate the electromyographic (EMG) activation of the pectoralis major (PM), anterior deltoid (AD), and triceps brachii (TB) muscles during shooting in CB and WB athletes and to verify whether there is any difference in muscle activation between the categories. Method: Comparing two groups in a transversal study, CB and WB, in which eleven individuals submitted to an electromyographic examination, of muscles PM, AD, TB on the extremity that was doing the shooting. We used a 4-channel EMG (Miotec/Brazil) (2000Hz/channel). Results: Comparing the muscles, the CB group showed a significant difference: greater AD muscle activation compared to the others; however in the WB group, no differences were found. When comparing between the groups, the PM muscle showed greater activation in the WB group, while the AD muscle was more active in the CB group. The TB muscle showed no difference between groups. Conclusion: From these results, the athletes from the CB and WB groups showed differences in muscle activation during shooting. However, both groups activated the AD the most, followed by the TB. The least active muscle was the PM, and these differences were more visible in the CB group.

Humans , Basketball , Upper Extremity/physiology , Electromyography/instrumentation , Sports for Persons with Disabilities/physiology , Cross-Sectional Studies
Bauru; s.n; 2015. 83 p.
Thesis in English | LILACS, BBO | ID: biblio-880078


O presente trabalho comparou dois métodos de diagnóstico para Bruxismo do Sono (BS): critérios de diagnóstico da Classificação Internacional de Distúrbios do Sono (ICSD-3) e um aparelho portátil com um canal de eletromiografia (EMG) (Grindcare) com o exame padrão ouro, polissonografia (PSG). A comparação com a PSG foi utilizada para determinar valores de corte apropriados e o número de noites necessárias para diagnóstico do BS válido e confiável com o Grindcare. Vinte estudantes da pós graduação e funcionários da Faculdade de Odontologia de Bauru participaram da amostra. Cada participante se submeteu a entrevista, exame físico, uso do Grindcare por cinco noites consecutivas e exame de PSG. A descriminação entre participantes com e sem bruxismo foi baseado somente na análise da PSG. Dados sobre EMG por hora de uso do Grindcare (EMG/h) e PSG (bursts/h) foram anotados. A validade dos critérios ICSD-3 e do Grindcare foram avaliados pela análise da área sob a curva (ASC) ROC (receiver operating characteristics), razão de probabilidade (RP), razão de possibilidade de diagnóstico (RPD) e análise de Bland-Altman. Os itens do ICSD-3 para BS obtiveram pouca a moderada concordância com o diagnóstico por PSG, com ASC de 0,55 até 0,75. O melhor valor de concordância obtido foi o relato de BS mais do que uma vez na semana associado ao relato de dor transitória na musculatura mastigatória ou fadiga pela manhã com moderada, mas significativa concordância, (ASC=0,75) com especificidade de 90, RP positiva=6 e RPD=13,5. Quando a frequência do relato de BS aumentou para 4 vezes na semana, a combinação do relato com desgaste dentário também apresentou valores altos de concordância com o diagnóstico realizado através de PSG (ASC= 0,75, RP=6, RPD=13,6). A análise de Bland-Altman dos EMG bursts/h mostrou uma concordância positiva entre os resultados do Grindcare e PSG. A análise pela curva ROC também mostrou que, se utilizado o mínimo de 18 EMG/h por 3 noites e 19 EMG/h por 5 noites de uso do Grindcare como valores de corte, a especificidade do teste é de 90% e a RP positiva de 5. Como há considerável heterogeneidade nos resultados, a aplicação dos critérios de diagnóstico da ICSD-3 para BS pode estar limitada. Ainda, o aparelho Grindcare está apto a predizer BS diagnosticado pela PSG, quando utilizado por 3 ou 5 noites consecutivas, e pode ser um recurso válido para a prática clínica.

The presented study intended to compare two methods for assessing Sleep Bruxism (SB): International Classification of Sleep Disorders diagnostic criteria (ICSD-3) and a portable single-channel electromyography (EMG) device (Grindcare) with gold standard polysomnographic (PSG) examination. The comparison with PSG was used to determine an appropriate cut-off value and the number of nights of sleep with the Grindcare device necessary for a valid/reliable SB diagnosis. Twenty consecutive post-graduate students and staff at Bauru School of Dentistry composed the sample. Each participant underwent interview, clinical assessment, the Grindcare for five consecutive nights and a PSG exam. The discrimination between bruxers and non-bruxers was based only on the PSG analysis. Data about electromyography per hour with Grindcare (EMG/h) and PSG (bursts/h) were scored. The validity of ICSD-3 criteria and the Grindcare device were assessed by using receiver operating characteristics (ROC) curve analysis (AUC), likelihood ratios (LR), the diagnostic odds ratio (DOR) and Bland-Altman analysis. The ICSD-3 diagnostic criteria items for SB had fair to moderate concordance with PSG diagnosis, with AUC ranging from 0.55 to 0.75. The best value of agreement was obtained by the report of SB more than once a week associated with a report of transient morning jaw muscle pain or fatigue with a moderate, but significant agreement with the PSG SB diagnosis (AUC=0.75) with 90% specificity, positive LR=6 and DOR=13.5. When the frequency of self-reported SB increased to more than 4 times per week, the combination of this finding with tooth wear had also high values of agreement with PSG SB diagnosis (AUC= 0.75, LR=6, DOR=13.6). Bland-Altman analysis of the EMG bursts/h showed positive agreement between Grindcare device and PSG exam. The ROC analyses also showed that using a minimum of 18 EMG/h for 3 nights and 19 EMG/h for 5 nights in Grindcare as cut-offs resulted in a 90% specificity and positive LR equal to 5. Since there is considerable heterogeneity in the results, the application of ICSD-3 for SB clinical diagnosis may be limited. Moreover, the Grindcare is able to predict SB diagnosed by PSG with a reasonable accuracy, when used for 3 or 5 consecutives nights, and it may be a valid choice in clinical practice for SB assessment.

Humans , Male , Female , Adult , Electromyography/instrumentation , Polysomnography/instrumentation , Sleep Bruxism/diagnosis , Surveys and Questionnaires/standards , Case-Control Studies , Electromyography/methods , Polysomnography/methods , Reproducibility of Results , ROC Curve , Sleep Bruxism/physiopathology , Statistics, Nonparametric , Time Factors
Bogotá; IETS; dic. 2014.
Non-conventional in Spanish | LILACS, BRISA | ID: biblio-875768


INTRODUCCIÓN: la Miastenia Gravis es una enfermedad autoinmune, caracteriza por debilidad y fatiga muscular, es fluctuante en su sintomatología, aunado a ello existen dos formas generales de Miastenia, la presentación ocular y la generalizada. No todos los pacientes son seropositivos a la identificación de anticuerpos contra receptores de acetil colina (AChR-ab), estas características hacen que la confirmación diagnóstica sea un reto clínico, y se consideren diferentes pruebas diagnósticas. OBJETIVO: realizar una revisión, apreciación crítica y síntesis de la evidencia disponible sobre la validez y utilidad de la identificación de AChR-ab para el diagnóstico de Miastenia Gravis. METODOLOGÍA: la evaluación fue realizada de acuerdo con un protocolo definido a priori por el grupo desarrollador. Se realizó una búsqueda sistemática en MEDLINE, EMBASE, Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, LILACS y Google, sin restricciones de idioma, fecha de publicación y tipo de estudio. Las búsquedas electrónicas fueron hechas en septiembre de 2014 y se complementaron mediante búsqueda manual en bola de nieve y una consulta con expertos temáticos. La tamización de referencias se realizó por dos revisores de forma independiente y los desacuerdos fueron resueltos por consenso. La selección de estudios fue realizada mediante la revisión en texto completo de las referencias preseleccionadas, verificando los criterios de elegibilidad predefinidos. Las características y hallazgos de los estudios fueron extraídos a partir de las publicaciones originales. Se realizó un análisis estadístico descriptivo. RESULTADOS: Se identificó una revisión sistemática de análisis descriptivo que evalúa la identificación de AChR-ab, SFEMG, RNS, comparados con el diagnóstico clínico, de calidad media, con una calidad individual de los estudios baja predominantemente, también se identificaron dos estudios primarios de tipo cohortes prospectiva que evaluaron la misma comparación y uno de ellos (1992) comparó los diferentes test en pacientes con un resultado previo negativo, para estos estudios el riesgo global de sesgo fue bajo. La identificación de AChR-ab comparado con el diagnóstico clínico (características clínicas y prueba de respuesta a colinesterásicos) presenta una buena sensibilidad y especificad, que se encuentra en los siguientes rangos para MG 0.90 -0.96 y 0.99 respectivamente; para MO una sensibilidad y especificidad de 0.44-0.66 y 0.98 -0.99 respectivamente. La sensibilidad y especificad reportada para la SFEMG comparada con diagnóstico clínico (características clínicas y prueba de respuesta a colinesterásicos), se encuentra en los rangos de 86% - 93% y 63% - 83%, respectivamente, reportados para MO y Miastenia. Se evidencia en la literatura variabilidad en la sensibilidad ye especificidad, derivada del tipo de musculo y el electrodo usado, lo anterior no permitió realizar análisis combinados del efecto dada la alta heterogeneidad entre los estudios primarios. En el caso de la RNS, la sensibilidad y la especificidad se encuentran en los siguientes rangos, para MO 29% a 77% y 94%, y para MG 79% a 80% y 97%, para MO el rango es amplio debido a la alta heterogeneidad entre los estudios. En el caso de pacientes seronegativos (AChR-ab negativos), se reporta una sensibilidad para la SFEMG de 97% y para RNS de 66%. Cuando los pacientes son positivos ante la identificación de AChR-ab, la sensibilidad de la SFEMG y la RNS disminuye a 80% y 61% respectivamente. No se encontraron estudios que reportaran la sensibilidad y especificidad de otros anticuerpos como: MuSK, anti RLP4 y receptores de sodio. CONCLUSIONES: en pacientes con sospecha de Miastenia Gravis, la identificación de AChR-ab tiene una buena sensibilidad y especificidad, especialmente para los casos de Miastenia Generalizada. La electromiografía de fibra unitaria (SFEMG) reportó mejores rangos de sensibilidad y especificidad que la identificación de AChR-ab y la estimulación repetitiva del nervio (RNS), cuando se comparan con diagnóstico clínico. En el caso de pacientes seronegativos (AChR-ab negativos), la SFEMG, tuvo la mejor sensibilidad. No se encontraron estudios que reportaran la sensibilidad y especificidad de otros anticuerpos como: MuSK, anti RLP4 y receptores de sodio.(AU)

Humans , Receptors, Cholinergic/analysis , Electromyography/instrumentation , Antibodies , Myasthenia Gravis/diagnosis , Treatment Outcome , Cost-Benefit Analysis , Colombia
Acta fisiátrica ; 21(3)set. 2014.
Article in Portuguese | LILACS | ID: lil-743681


O envelhecimento altera a função musculoesquelética prejudicando a marcha e a manutenção do equilíbrio corporal. Objetivo: Verificar e comparar a atividade eletromiográfica (EMG) da região do tornozelo de idosos e jovens fisicamente ativos. Método: Participaram deste ensaio 40 indivíduos de ambos os sexos considerados fisicamente ativos mediante o Questionário Internacional de Atividade Física - IPAQ (formato curto). Não participaram do estudo aqueles com algum tipo de condição clínica que afetasse o equilíbrio e contração muscular. Avaliou-se a atividade eletromiográfica (EMG) dos músculos tibial anterior e tríceps sural na posição bipodal (BA) e unipodal (UA), com olhos abertos. Para a captação dos sinais EMG foram utilizados eletrodos monopolares de superfície Ag/AgCl da KENDALL (MEDITRACETM 200). O teste t de Student foi utilizado para a comparação entre os grupos. O nível de significância adotado foi p < 0,05. Resultados: Os idosos exibiram valores superiores quanto a frequência de potenciais de ação em 3 das 4 condições avaliadas. Conclusão: Os idosos deste estudo exibiram maior frequência de disparos e recrutamento de unidades motoras dos músculos do tornozelo para a manutenção das posturas unipodal e bipodal, em comparação aos jovens.

Aging changes the musculoskeletal function and affects gait and body balance. Objective: To compare the electromyographic activity (EMG) of the ankles of physically active older and younger people. Method: Forty subjects of both genders considered physically active through the International Physical Activity Questionnaire - IPAQ (short format) participated in this study. Those with some kind of medical condition that could affect balance and muscle contraction did not participate in the study. We evaluated the electromyographic activity (EMG) of the tibialis anterior and triceps surae in bipedal stance (BS) and single-leg (US) with eyes open. To capture the EMG, monopolar Ag/AgCl surface electrodes from KENDALL (MEDITRACETM 200) were used. The Student t test was used for comparison between groups. The level of significance adopted was p < 0.05. Results: Elderly individuals exhibited higher values regarding the frequency of action potentials in 3 of the 4 conditions assessed. Conclusion: The older volunteers in this study exhibited a higher firing rate and recruitment of motor units of the ankle muscles to maintain the bipedal and unipedal stance, as compared to the younger.

Humans , Aging , Electromyography/instrumentation , Postural Balance , Surveys and Questionnaires
Acta fisiátrica ; 21(1)mar. 2014.
Article in Portuguese | LILACS | ID: lil-737209


Alterações musculares e anatômicas são em sua maioria responsáveis pela síndrome patelofemoral (SDPF). Sabendo que a musculatura do quadríceps é de grande importância na estabilização da patela, questiona-se como o músculo Vasto Medial Oblíquo (VMO) influencia na estabilizaçãopatelar evitando a SDPF. Muitos pesquisadores tem investigado o uso da bandagem funcional como meio de ativação muscular. Objetivo: O presente estudo teve como objetivo analisar o uso da bandagem como meio de ativação do VMO no exercício de agachamento. Método: A atividade dos músculos VMO e Vasto lateral (VL) foi avaliada através de eletromiografia durante o agachamento com adução e o agachamento com o uso de bandagem. A amostra composta por 39 indivíduos foi dividida em quatro grupos: indivíduos do sexo masculino sedentários e atletas, eindivíduos do sexo feminino sedentárias e atletas. Resultados: Embora tenha sido encontrada uma maior ativação do VMO em relação ao VL, com a presente metodologia e variáveis estudadas, não foi possível demonstrar diferença estatística entre os grupos nos agachamentos com e sem o uso da bandagem. No entanto, é importante ressaltar que a ausência de diferença na ativação do VMO durante o agachamento com adução e com bandagem sugerem um efeito positivo e facilitador da bandagem na ativação muscular. Este resultado é muito importante no tratamento de lesões agudas onde o movimento ativo está limitado. Conclusão: Sugere-se a execução de novos estudos aonde outros parâmetros da eletromiografia e estimulação reflexa sejam abordados, a fim de investigar o real papel da bandagem funcional na ativação muscular.

Muscular and anatomical changes are mostly responsible for patella femoral syndrome (PFPS). Knowing that the quadriceps muscles are very important in stabilizing the patella, studies have questioned the influence of the Vastus Medialis Obliquus (VMO) in the patellar stabilization avoiding the PFPS. Many researchers have investigated the use of taping as a means of muscleactivation. Objective: The present study aimed to analyze the use of functional taping to activate the VMO during the squat exercise. Method: The activity of the VMO and Vastus Lateralis (VL) was assessed by electromyography during squats and squats with adduction using functional taping. The sample, composed of 39 individuals, was divided into four groups: males and females, both separated into sedentary and athletic types. Results: Although greater activation of the VMO has been found in comparison with the VL, with the applied methodology and variables, we could not demonstrate a statistical difference between groups in squats with and without the use of functional taping. However, it is important to emphasize that the lack of difference in the activation of VMO during squats with adduction and taping suggests a positive effect of the taping in muscleactivation. This result is very important in the treatment of acute injuries where active movement is limited. Conclusion: Future studies should be done with other electromyography parameters and reflex activation in order to investigate the actual role of functional taping in muscle activation.

Humans , Patellofemoral Pain Syndrome/physiopathology , Electromyography/instrumentation , Quadriceps Muscle , Sedentary Behavior , Athletes
Arq. neuropsiquiatr ; 71(4): 237-243, abr. 2013. tab, graf
Article in English | LILACS | ID: lil-670886


Objective: To estimate jitter parameters in myasthenia gravis in stimulated frontalis and extensor digitorum muscles using the concentric needle electrode. Methods: Forty-two confirmed myasthenia gravis patients, being 22 males (aged 45.6±17.2 years-old) were studied. Jitter was expressed as the mean consecutive difference (MCD). Results: MCD in extensor digitorum was 61.6 µs (abnormal in 85.7%) and in frontalis 57.3 µs (abnormal in 88.1%). Outliers represented 90.5% for extensor digitorum and 88.1% for frontalis. At least one jitter parameter was abnormal in 90.5% of the combined studies. Acetylcholine receptor antibody was abnormal in 85.7% of the cases. Conclusions: Stimulated jitter recordings measured from muscles using concentric needle electrode can be used for myasthenia gravis diagnosis with high sensitivity. Extensive normative studies are still lacking and, therefore, borderline findings should be judged with great caution. .

Objetivo: Mensurar os valores do jitter em pacientes com miastenia gravis nos músculos frontalis e extensor digitorum pela técnica estimulada, utilizando-se eletrodo de agulha concêntrica. Métodos: Foram estudados 42 pacientes, sendo 22 homens (idade 45,6±17,2 anos), com miastenia gravis confirmada. O jitter foi expresso como a média das diferenças consecutivas (MDC). Resultados: A MDC para o extensor digitorum foi 61,6 µs (anormal em 85,7%) e para o frontalis 57,3 µs (anormal em 88,1%). Outliers representaram 90,5% para o extensor digitorum e 88,1% para o frontalis. Pelo menos um parâmetro do jitter foi anormal em 90,5% dos estudos combinados. Anticorpo receptor de acetilcolina estava anormal em 85,7% dos casos. Conclusões: Jitter estimulado mensurado por meio de eletrodo de agulha concêntrica pode ser utilizado para diagnóstico de miastenia gravis com elevada sensibilidade. Estudos normativos mais amplos ainda são necessários e, portanto, valores limítrofes devem ser avaliados com cautela. .

Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Young Adult , Electromyography/instrumentation , Muscle Contraction/physiology , Myasthenia Gravis/physiopathology , Neuromuscular Junction/physiology , Electrodes , Electric Stimulation/methods , Electromyography/methods , Myasthenia Gravis/diagnosis , Needles
IJPM-International Journal of Preventive Medicine. 2013; 4 (Supp. 2): 323-329
in English | IMEMR | ID: emr-127475


Nowadays Medical equipment plays an important role in the treatment and in the medical education. Using outdated preventive maintenance [PM] system may cause problems in the cutting edge medical equipment, Nervous system disease's equipment [In diagnosis and treatment] which are crucial for every medical center. Based on above facts we focused on nervous system treat units' equipment and informed the supervisors and their colleagues about the latest equipment maintenance status and promoted methodical and correct method to be used for medical equipment maintenance. This research is an analytical descriptive and has been done on the base information from a particular time to past. We gathered our required information of 2009 from Alzahra Medical Center. We divided this research info 2 main phases. In the first phase, we picked out Neurosurgery and Neourology diseases medical equipment [diagnosis and therapy equipment] and in the second phase, we need to implement a methodical PM for every equipment. Research has shown that there are 19 nervous system equipment in Alzahra Medical center, categorized in diagnostic [13 pcs], therapeutic [4 pcs] and diagnostic therapeutic [2 pcs]. As we declare in methods part of this research, we categorized medical equipment in Food and Drug Administration [FDA] segmentation. Capital-scarce equipment: Magnetic resonance imaging, Eco Doppler, Kamalaarak ultrasonic surgical aspirator, Stereotactic, computed tomography-scan, euroendoscope/vital-scarce equipment: Coblation, Sonoco, vaterjet/ scarce equipment: Transcranial color Doppler, electroencephalogram, electromyography, surgical microscope. Survey of application and preventive maintenance of neurology medical equipment in Isfahan Alzahra hospital show there is no P.M system. Implementing a complete P.M system for this medical center is crucial to preventing cause problems for these medical equipment and decreasing maintenance costs and gaining uptime. Researchers of this article have tried to provide PM, use of texts, web and experts

Neurology/instrumentation , Maintenance , Radiography/instrumentation , Magnetic Resonance Imaging/instrumentation , Electroencephalography/instrumentation , Electromyography/instrumentation , Tomography Scanners, X-Ray Computed
Braz. dent. j ; 22(6): 497-501, 2011. ilus, tab
Article in English | LILACS | ID: lil-622724


Hormonal fluctuations during the menstrual cycle may influence on muscular tensions and probably alter occlusal force. The aim of this study was to evaluate whether hormonal levels affect maximum occlusal force (MOF) of healthy women throughout the different phases of the menstrual cycle. Sixty complete dentate subjects who were not under use of oral contraceptives were selected to participate in this study. MOF was bilaterally evaluated on the molar region, during 3 complete menstrual cycles, using 5.65 mm-wide sensors. Measurements were carried out during each of the following menstrual cycle phases: menstrual, follicular, periovulatory and luteal, presumed by ovulation test. Data were analyzed by one-way ANOVA and Tukey-Kramer test (p<0.05). Comparisons among menstrual cycle phases showed no differences on MOF (p=0.27). Under the conditions of this study, it may be concluded that hormonal fluctuations during the menstrual cycle do not affect MOF of a sample of healthy women.

As flutuações hormonais durante o ciclo menstrual podem influenciar as tensões musculares e possivelmente alterar a força oclusal. O objetivo deste estudo foi avaliar se os níveis hormonais afetam a força máxima oclusal (FMO) de mulheres saudáveis durante as diferentes fases do ciclo menstrual. Sessenta pacientes completamente dentadas que não usavam contraceptivos orais foram selecionadas para participar neste estudo. FMO foi avaliada bilateralmente na região dos molares, durante 3 ciclos menstruais completos, utilizando sensores de 5,65 mm de espessura. As mensurações foram realizadas durante cada fase do ciclo menstrual: menstrual, folicular e lútea periovulatória, identificadas por teste ovulatório. Os dados foram analisados por ANOVA um critério seguido do teste de Tukey-Kramer (p<0,05). As comparações entre as fases do ciclo menstrual não apresentaram diferenças na FMO (p=0,27). Segundo as condições deste estudo, pode-se concluir que as flutuações hormonais durante o ciclo menstrual não afetaram a FMO de mulheres saudáveis.

Female , Humans , Young Adult , Bite Force , Menstrual Cycle/physiology , Electromyography/instrumentation , Fertile Period/physiology , Follicular Phase/physiology , Luteal Phase/physiology , Masticatory Muscles/physiology , Menstruation/physiology , Muscle Contraction/physiology , Transducers
Rev. ing. bioméd ; 4(8): 41-56, jul.-dic. 2010. ilus, graf, tab
Article in Spanish | LILACS | ID: lil-590329


En este artículo se presenta el desarrollo de un algoritmo para la estimación de la velocidad de los movimientos básicos de la mano usando redes neuronales artificiales a partir del sensado de la actividad electromiográfica del antebrazo. Parala implementación de dicho algoritmo fue necesario adaptar un modelo funcional de laboratorio para la medición de la velocidad, usando procesado digital de imágenes, presentando un error bajo en la medición de velocidad. Asimismo, para la estimación de velocidad a partir del análisis de la sEMG (señal electromiográfica superficial) se escogió una red NARX (nonlinear autoregressive network with exogenous inputs) como resultado de la comparación de diversas topologías de redes neuronales dinámicas. Losresultados mostrados evidencian una aproximación adecuada en la estimación de velocidad, que sirve como punto de comparación al usarse metodologías diferentes para obtener los perfiles de velocidad.

In this paper an algorithm for estimating the speed of the basic hand movements using artificial neural networksbased on recorded electromyographic activity at the forearm is presented. To implement this algorithm it was necessary to adapt amodel for measuring the speed, using digital image processing, which presented a low error rate measurement. Likewise, for speedestimation, a NARX network (network nonlinear autoregressive with exogenous inputs) was chosen after comparing differentdynamic neural network topologies. The results shown demonstrated a suitable approach to the estimation of speed, which servesas a comparison to the different methodologies used to obtain the velocity profiles.

Artificial Limbs , Electromyography/instrumentation , Neural Networks, Computer , Outflow Velocity Measurement , Arm
Rev. ing. bioméd ; 4(7): 63-73, ene.- jun. 2010.
Article in Spanish | LILACS | ID: lil-590325


El presente artículo presenta una revisión bibliográfica sobre el diseño de exoesqueletos y las diferentes aplicaciones que estos pueden tener en la vida humana. Se exponen diferentes desarrollos, resaltando las partes más importantes de cada uno y prestando especial atención al área de la ingeniería electrónica presente en estas estructuras. Además, se realiza un agrupamiento de los diseños, dependiendo de la zona corporal para la cual se ha construido el exoesqueleto o de la finalidad del estudio realizado. Finalmente, se presentan desarrollos y estudios que buscan utilizar las señales mioeléctricas como parte fundamental del sistema exoesquelético.

This paper presents a literature review about exoskeletons and their applications in human life. Different developments highlighting the most important parts of each of them, and paying particular attention to the area of electronic engineering related to these structures, are shown. Also, a grouping of the different kinds of structures is made depending on the area of the human body to which the exoskeleton was intended to or depending on the purpose of the research. Finally, various studies and developments which use mioelectric signals as a fundamental part of the system are presented.

Automatic Control of Processes , Electromyography/instrumentation , Military Medicine/instrumentation
Braz. dent. j ; 19(2): 130-133, 2008. ilus, tab
Article in English | LILACS | ID: lil-484949


Electromyography is frequently used to measure the activity of masticatory muscles. It requires the precise setting of the electrodes, which demands the accurate location of the muscle to be evaluated. The purpose of this study was to investigate the accuracy of an external method to locate the buccinator muscle. Fifteen human cadavers were evaluated and planes were determined on the face using anatomic landmarks. An angle (a) was obtained at the intersection of these planes on the central point of buccinator muscle and measured with a protractor. The value of the angle allows locating the central point of buccinator muscle based on anatomic landmarks on the face. Statistical analysis of the collected data indicated an angle of 90º with 95 percent reliability, thus proving the efficacy of the proposed method.

A eletromiografia é frequentemente utilizada para mensurar a atividade dos músculos mastigatórios. Esta análise exige a colocação precisa dos eletrodos, o que requer a localização exata do músculo a ser avaliado. O objetivo do presente estudo foi investigar a acurácia de um método externo para localização do músculo bucinador. Quinze cadáveres humanos foram avaliados e planos foram determinados na face utilizando-se pontos de referência anatômicos. Um ângulo (a) foi obtido na interseção desses planos no ponto central do músculo bucinador e foi medido com um transferidor. O valor do ângulo permite localizar o ponto central do músculo bucinador baseado nos pontos de referência anatômicos da face. A análise estatística dos dados obtidos indicou um ângulo de 90º com 95 por cento de confiabilidade, confirmando dessa forma a eficácia do método proposto.

Humans , Cheek/anatomy & histology , Electromyography , Facial Muscles/anatomy & histology , Cadaver , Cephalometry/methods , Electrodes , Electromyography/instrumentation