308 resultados para Músculos


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Introduction: The use of stabilizer bracelet is a frequent treatment for movement disorders to strengthen muscles and adjust coordination. Still questions remain regarding the benefi t of using loads to decrease involuntary movements and the best load and placement. Objective: To measure the infl uence of the stabilizer bracelet on the kinematics and spatiotemporal parameters in planar movements performed by the upper limb. Method: One child, who has the spastic diplegy type of cerebral palsy with choreoathetoid component, and a control child without cerebral palsy, both female and 7 years old, were subjected to analysis of movements in relation to displacement, velocity, linear acceleration, and the calculation of mean square error (MSE) with and without use of stabilizer bracelet with loads of 25, 50, and 75% of the supported maximum load. Results: After comparing data between subjects, a difference was found between patient and control in all situations and variables. An inter-individual comparison using 25% of the maximum load showed the smallest difference with the NDE. Discussion and Conclusion: This therapeutic option is low cost, easy to apply, and does not signifi cantly interfere in the aesthetic of the individual. Therefore, physiotherapists may prescribe this for activities that require greater control of the upper limb because for the case studied the upper limb movement was more effi cient with the use of the stabilizer bracelet.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Introduction: the lumbar spine is the main part of the body responsible for the support of the loads, where approximately half of body weight is in stable balance. This support relates to the action of abdominal muscles, of great importance in the balance of that region. The existence of abdominal muscle weakness, such won’t perform its function, may induce pathological postural attitude, that predispose the pain. Objective: to compare the effects of two abdominal strengthening protocols on pain and postural alignment in individuals with low back pain. Method: participated of the study 21 individuals of both genders, with ages between 19 and 25 years old (average 21,8±1,5) and average Body Mass Index (BMI) 21,9 (±2,48), divided randomly in isometric abdominal stimulation group (n=8), abdominal strengthening group (n=7) and control group (n=6). They realized eight sessions of strengthening, when responded Visual Analogue Scale (VAS) before and after each intervention. The control group (n=6) had no intervention. The postural data had been analyzed by photogrammetry. Results: Pain and posture data were analyzed using paired t test, with signifi cance index of 5%. Postural angles had no signifi cant differences (p>0,05) from all angles analyzed after the intervention to none of the groups. For pain values, a signifi cant decrease (p<0,05) was observed since the fi fth session in patients who were treated by the abdominal exercises protocol, and the fi rst session in patients who were treated by the isometric abdominal stimulation protocol. However, this decrease in pain was immediate, not lasting along the treatment sessions, in both protocols. Conclusion: the proposed protocols did not interfere in postural alignment. They were effective to decrease pain in a same session, once the isometric was the most effective, but they weren’t effective in preserving the improves over time.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Patients with Chronic Obstructive Pulmonary Disease may have muscle dysfunction, which ultimately reduce the functional capacity. Neuromuscular electrical stimulation (NMES) is a technique that can be effective in these patients, and implies low overload to the cardiorespiratory system. The aim of this study was to investigate the effects of NMES on muscle strength and cardiorespiratory fitness in COPD patients. Five patients (2 men, 3 women) were evaluated, with a mean age of 70.40 ± 6.61 years, and underwent anamnesis, anthropometric measurements, spirometry, pulmonary function, cardiopulmonary functional capacity and muscle strength in the lower limbs. After the evaluations, the patients were enrolled in a program of electrical stimulation of the quadriceps muscles, performed 3 times per week for 5 weeks. Each session lasted for 30 minutes, being reassessed at the end of the 15 sessions. Statistically significant response is observed to gain strength in lower limb (p = 0.005), but no significant responses were observed for the distance in six minute walking test before and after the test protocol for electrical stimulation. Showing that with NMES was located just gain muscle strength without effects on functional capacity, and there are few studies that investigate these effects, so further studies are needed to investigate this relationship.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

A taurina (ácido 2-etanoaminossulfônico) apresenta diversas funções fisiológicas, como atuação no neurodesenvolvimento, ação no coração contra arritimias, ação nos músculos esqueléticos contra atrofia, faz parte da bile na forma de um composto conjugado, constutuindo um dos sais biliares, e anti-inflamatória, inibindo mediadores pró-inflamatórios. Neste projeto a ênfase foi voltada para a ação anti-oxidante da taurina, que forma um complexo com espécies como o ácido hipocloroso (HOCl) e ânions clorito (OCl-) que potencialmente possuem ações danosas à célula. Esse complexo, a taurina cloramina (Tau-Cl), possui também ações contra mediadores inflamatórios, como o fator de necrose tumoral alfa (TNF-α) e o óxido nítrico (NO). Por ser uma molécula com alta polaridade e hidrossolubilidade, a taurina não consegue penetrar na pele pelo extrato córneo intacto, a camada mais externa da pele, que constitui sua barreira contra perda ou absorção de água e eletrólitos. Foi feita então a síntese de um pró-fármaco derivado da taurina, formado por seu acoplamento com uma cadeia carbônica longa, aumentando significativamente a lipossolubilidade em relação a taurina pura, e podendo assim, essa molécula, transpor o extrato córneo intacto e exercer sua ação anti-oxidante, podendo ser, portanto, caracterizado como um pró-ativo. Este pró-fármaco, o ácido 2-palmitamidoetanossulfônico, foi sintetizado por meio de uma reação entre um cloreto de acila (cloreto de palmitoíla) e taurina, utilizando trietilamina como base, por meio de um método conhecido por Schotten-Baumann. O produto formado foi analisado por cromatografia em camada delgada (CCD), faixa de fusão, espectroscopia de absorção no infravermelho (IV) e espectometria de massa (EM), sendo que todas as análises confirmaram que a síntese foi bem sucedida

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Junto ao Laboratório de Fracionamento de Proteínas, desenvolveu atividades aplicando técnicas eletroforéticas (gel de agarose, eletroforese nativa em gel de poliacrilamida) em amostras de músculos de aves de interesse comercial (frangos, perus e avestruzes), tendo como co-orientador o Prof. Paulo Tadeu Figueira da Faculdade de Medicina Veterinária, PUC/PR - Toledo, onde desenvolveu atividades de análise de géis de eletroforese. Aplicou as técnicas de eletroforeses citadas em amostras de músculos e soro sanguíneo (em andamento) de tilápias (Oreochromis niloticus), bem como desenvolveu atividades de análises computacionais (VDS – PHARMACIA) e estatísticas (ASSISTAT) nos dados obtidos, resultando na participação em 7 congressos com apresentação de trabalhos. Cursou a disciplina de Genética, como aluno especial, junto à turma de Licenciatura em Ciências Biológicas, num total de 8 créditos, sendo aprovado com média 7,2

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Introdução: A utilização de diferentes intensidades em sessões de exercícios com pesos, para os músculos extensores do cotovelo, tem proporcionado diferenças na sustentabilidade das repetições e no volume total. Entretanto, devido às alterações do desempenho neuromuscular inter-membros, tais evidências não podem ser extrapoladas para membros inferiores. Objetivo: Comparar a resposta aguda de sessões de exercício com pesos, realizadas com diferentes intensidades, na sustentabilidade das repetições e no volume total, em idosas treinadas. Materiais e Métodos: Participaram do estudo 16 idosas (68,3 +-6,0 anos) treinadas com pesos. Os dados foram coletados em cinco sessões, separadas por no mínimo 48 horas de descanso. A intensidade, em quilogramas, do teste de repetições máximas (15 RM) foi determinada nas duas primeiras visitas e confirmada na terceira. Nas quarta e quinta visitas, foram realizadas as sessões com as diferentes intensidades (em uma sessão - três séries até a fadiga muscular concêntrica, com a intensidade de 100% de 15 RM; na outra sessão - duas séries de 15 repetições e na terceira série até a fadiga muscular concêntrica, com a intensidade de 90% de 15 RM). Em ambas as sessões, o intervalo de recuperação utilizado entre as séries foi de dois minutos. Todas as participantes realizaram ambos os protocolos e um delineamento crossover balanceado foi utilizado para determinar a ordem das sessões. Resultados: O teste t de Student para amostras dependentes demonstrou que o volume total da sessão de teste com 90% de 15 RM foi significativamente superior (22,5%; P < 0,01) ao da sessão com 100% de 15 RM. A ANOVA indicou efeitos principais de condição, momento ...(Resumo completo, clicar acesso eletrônico abaixo)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The ankle sprains represent the most common injuries in sports and basketball. In this sense, the use of ankle bracing and strength capacity analysis of the ankle evertor and invertor muscles, have been suggested as preventive measures and important tools for identifying risk factors associated with ankle sprains. However, questions still persist as to effect of the use ankle bracing on biomechanical variables related to the stability of the ankle. For this reason, this study aims to analyze the effect of the use of ankle bracing on peak torque (PT) of ankle evertor and invertor muscles and on eccentric evertor/concentric invertor torque ratio (EVEECC/INVCON), during the basketball match-play simulation. Ten healthy college basketball players, without mechanics or functional ankle instability performed a laboratory-based protocol representative of work rates observed during basketball match-play, in two different situations, with and without use of ankle bracing. The test was composed of a succession of intermittent physical effort equally distributed in four periods of 10 minutes each, considering the mechanical and physiological demands of a basketball match-play. Prior to the start of the trial (Evaluation 1) and after 2° (Evaluation 2) and 4° (Evaluation 3) periods, the subjects performed five maximal isokinetic concentric and eccentric contractions of ankle invertor and evertor muscles, separated by two minutes rest, at 60 °/s and 120 °/s. After testing for normality of data distribution with the Shapiro-Wilk test, was used the ANOVA repeated measures for two factors and post-hoc Bonferroni test for comparison of variables between assessments. Was adopted p < 0.05. There was no significant difference for PT and EVEECC/INVCON torque ratio between assessments. There was a decrease in PT EVEECC at 60º/s and 120º/s for the ...(Complete abstract click electronic access below)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

A insuficiência cardíaca (IC) está associada a miopatia dos músculos esqueléticos dos membros, com perda da massa muscular, diminuição na proporção das fibras do tipo I (contração lenta) e aumento na proporção das fibras do tipo II (contração rápida). É provável que alterações na expressão de fatores de transcrição pertencentes à família “basic helix-loop-helix” (bHLH), da qual fazem parte a MyoD, Miogenina, Myf5 e o MRF-4, conhecidos como fatores de regulação miogênica (MRFs), sejam responsáveis pelas mudanças nos tipos de fibras. Enquanto que a Miogenina é expressa em níveis superiores aos da MyoD em músculos lentos, o oposto é verdadeiro para músculos rápidos. Similarmente, a MyoD está associada com a expressão das isoformas de miosina de cadeia pesada rápidas dos tipos IIX e IIB. Estudos in vitro, demonstraram que o TNF-α inibe a expressão de MyoD e miogenina diminuindo a atividade de genes músculo específicos. A ação do TNF-α diminuindo a expressão da MyoD mostra-se mais acentuada quando em associação com o IFN-γ, no entanto, há poucas informações na literatura a respeito do papel desta associação na expressão dos fatores de regulação miogênica, in vitro. Avaliar a expressão dos fatores de regulação miogênica, MyoD, miogenina, Myf5, e MRF-4 em cultura de mioblastos C2C12 submetidos ao TNF-α/IFN-γ. Nossos resultados mostraram um aumentou na expressão dos gene MyoD, Myf5 e miogenina sob tratamento com IFN-γ quando comparado aos grupos controle e TNF-α/IFN-γ. A expressão gênica do MRF-4 na cultura de células não foi detectada em nenhum dos grupos analisados. O GAPDH foi utilizado para normalizar os valores de expressão dos outros genes analisados. O presente estudo demonstrou que o IFN-γ exógeno administrado à culturas de mioblastos... (Resumo completo, clicar acesso eletrônico abaixo)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Recent research advances in understanding the cellular and molecular mechanisms that underlie the processes of hypertrophy and atrophy. This may contribute to development of effective therapeutic strategies to attenuate or block the loss of muscle tissue associated with aging and pathological conditions. In this context, myogenic factors that control the activity of satellite cells have been studied to better understand the events involved in the recovery of muscle mass. Among them, we highlight the Myogenic Regulatory Factors (MRFs), which have been described as potential mediators of muscle growth. The objectives of this study evaluated the morphofunctional adaptations and gene expression of MRFs (MyoD and myogenin) in skeletal muscle (soleus) subjected to an atrophic stimulus followed by physical training. It was used 64 male Wistar rats (80 days, 250 to 300 g), divided into 8 groups (n = 8): C: control animals a week, I: Animals immobilized a week, C3: control animals 3 days; R3: Animals immobilized and recovered for 3 days, T3: Animals immobilized and submitted to exercise for 3 days; C7: Animals controls 7 days; R7: Animals immobilized and subsequently recovered by 7 days, T7: Animals immobilized and subsequently subjected to exercise for 7 days. Initially, the animals in groups I, R3, R7, T3 and T7, were submitted to 7 days of immobilization of the hind limb. Muscle atrophy was confirmed after a direct statistical comparison of the values of cross-sectional area (CSA) of muscle fibers studied in animals in groups I and C, sacrificed immediately after the immobilization period. Then, the groups T3 and T7 were submitted a rehabilitation program with muscle aerobic exercise (swimming) for 3 and 7 days respectively. The groups C, C3 and C7 were kept without stimulus atrophic and were not subjected to exercise. At the end of the experiment, the animals were sacrified and the soleus muscle removed. The quantitative analysis of gene expression ...

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The Sarcocystis genus includes obligatory two-host life cycle protozoan parasites. It is the most numerous of the six genera of the Sarcocystidae family. The infection caused by parasites of this genus is a zoonotic and cosmopolitan disease known as sarcosistosis or sarcosporidiosis. The sarcositosis though frequently asymptomatic in its definitive hosts can be fatal in its intermediate hosts. The usual diagnoses of sarcosistosis takes place through a histological demonstration of schizonts in blood vessels and organs, and the presence of cysts in muscle tissue by necropsy or biopsy, this second method still more common and based on morphological features of the sarcocyst. However, these methods can be inadequate to a precise identification of the infector species once that, besides the genus being of numerous species, these often present similar morphological features. Another factor that makes the diagnostic more difficult is the non specificity of some Sacocystis species to their hosts. Consequently, molecular diagnostic methods have been used in order to identify the infector species and the parasite specific biological cycles, demonstrating also new species and coevolutive aspects between parasite and host. Among the most employed molecular techniques the Polimerase Chain Reaction (PCR), the nested-PCR and the Restriction Fragment Length Polymorphism (RFLP) stands out

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Several studies have shown that different stretching routines can lead to decreases on acute neuromuscular system performance. Although the deficit in muscle strength mediated by different methods of stretching has been systematically observed, few studies have investigated the possible existence of a dose-response relationship between the amount of stretching and muscle strength deficit in older adults. In this context, the objective of this study was to investigate the acute effect of two different stretching volumes on isometric force-time curve (Cf-t) in elderly women. The study included 13 older women (64.08 ± 4.27 years, 69.98 ± 10.56 kg, 157.90 ± 8.66 cm, 28.25 ± 4.22 kg/m²). The participants visited the laboratory for five consecutive days, among which the first two were used for familiarization. During the other three days the participants underwent experimental conditions: control (C) stretch 30 seconds (AE30) and stretch 60 seconds (AE60). For the AE30 and AE60 conditions, three series of passive static stretching were performed, with duration of 30 and 60 seconds, respectively. The experimental conditions were performed with an interval of at least 24 hours between them and the order of execution was randomized. The recording of isometric Cf-t of the knee extensor muscles was performed in extensor chair connected to a force transducer. Measurements were recorded immediately after each experimental condition, for five seconds. For statistical analysis, descriptive procedures were used and ANOVA one way to check possible changes on the Maximal Voluntary Contraction (CVM) and Peak Rate of Force Development (TDFP) among the three conditions (p <0.05). The ANOVA showed no statistically significant difference for CVM and TDFP, between the three conditions. It can be concluded that different volumes of static stretching, three sets ...(Complete abstract click electronic access below)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Clinical manifestations of arterial thromboembolism in cats depends on the location of embolization, the severity and duration of occlusion, the functionality of the collateral circulation and the development of complications. In case of location in the terminal abdominal aorta usually presents animal paresis/paralysis, pulses are weak or nonpalpable, pain, cold limbs. Gastrocnemius and tibialis muscles generally have become bulbous, swollen and sore because of ischemic neuromyopathy. The nail beds become pale or very dark (purple to black), and do not bleed when cut. Due to the small number of researches in the area it’s until not possible to determine which medication, dosage and frequency of administration are more suitable for the treatment of arterial thromboembolism in cats. Among the options currently available the cheapest, easiest to administer and which requires no periodic monitoring is the low-dose aspirin

Relevância:

10.00% 10.00%

Publicador:

Resumo:

A musculatura peitoral de anuros gera a potência necessária para a produção das vocalizações, tendo seu perfil histológico descrito para apenas uma espécie. Para esta, a musculatura peitoral apresenta 100% de fibras oxidativas rápidas. Entretanto, a taxa de vocalização apresenta enorme variação interespecífica, mesmo considerando espécies pertencentes a um mesmo gênero, como é o caso do gênero Scinax. Acreditamos que o perfil morfológico e histoquímico da musculatura peitoral, particularmente no tocante à capacidade oxidativa aeróbia, deve covariar com o desempenho aeróbio. Desta forma, o objetivo deste projeto foi realizar uma análise comparativa da morfologia e histoquímica do músculo peitoral de três diferentes espécies de pererecas do gênero Scinax. Os animais foram coletados durante o pico de atividade reprodutiva. Estes foram pesados e eutanaziados para a retirada dos músculos peitorais. Fragmentos musculares foram congelados em nitrogênio líquido e armazenados em freezer -80°C. Cortes histológicos (10μm), obtidos em criostato, foram submetidos à coloração HE (Hematoxilina-Eosina) para avaliação do padrão morfológico das fibras, e NADH-TR (Nicotinamida Adenina Dinucleotídeo-Tetrazólico Redutase), para avaliação do metabolismo oxidativo das fibras. Não houve diferenças qualitativas e quantitativas na morfologia e área das fibras entre as espécies. Provavelmente as diferenças comportamentais interespecíficas devem estar associadas a caracteres ultraestruturais da musculatura como capilarização, volume mitocondrial e tipo de miosina (MHC) presente na fibra muscular. O músculo peitoral de S. perereca e S. fuscovarius apresentou forte reação NADH-TR, o que demonstra alto metabolismo oxidativo, enquanto que Scinax hiemalis apresentou uma população de fibras com metabolismo oxidativo mais moderado; isso está de acordo com dados... (Resumo completo, clicar acesso eletrônico abaixo)