Relação entre a tensão aplicada e a sensação de desconforto nos músculos isquiotibiais durante o alongamento

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

Razão eletromiográfica de músculos estabilizadores do ombro durante a execução de exercícios com haste oscilatória

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

Análise de parâmetros de força e resistência dos músculos eretores da espinha lombar durante a realização de exercício isométrico em diferentes níveis de esforço

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Padrão de co-ativação dos músculos do tronco durante exercícios com haste oscilatória

This study aimed to compare trunk muscle co-activation pattern during exercises using an oscillatory pole. Twelve volunteers participated in this study, in which they performed three different exercises. EMG activity of internal oblique (IO), external oblique (EO), rectus abdominis (RA), multifidus (MU) and iliocostalis lumborum (IL) was collected. The EMG signals were analyzed in time domain (RMS) and muscles activation ratios were computed as follow: anterior-posterior (A/P=RA+EO+IO/MU+IL), MU/IL and OE/OI. The bilateral oscillation of the pole in frontal plane (exercise II) promoted a higher value of MU/IL ratio than unilateral oscillation of the pole in sagital plane (exercise III). Also, the bilateral oscillation of the pole in frontal plane (exercise II) and the unilateral oscillation of the pole in sagital plane (exercise III) caused higher values of the IO/EO than bilateral oscillation of the pole in transversal plane (exercise I). Thus, the exercises II and III required higher activation of trunk stabilizer muscles, being more indicate for training, which aims higher recruitment of these muscles in daily activities.

Efeito do envelhecimento sobre o comportamento mecânico dos músculos papilares de ratos Wistar.

PURPOSE--To evaluate the effects of age on mechanical performance of rat myocardium. METHODS--Left ventricular papillary muscles were isolated from male Wistar rats at 1, 3, 6 and 12 months of age. Muscles were studied isometrically and isotonically, stimulated at 0.2 Hz, perfused with Krebs-Henseleit solution having an external calcium concentration of 2.52 mM, and maintained at 28 degrees C. RESULTS--Peak isometric developed tension was significantly higher in 1 month than 3, 6 and 12 months. Peak rate of isometric tension rise decreased substantially between 1, 3 and 12 months. Time to peak isometric developed tension showed a significant increase of both 3 and 12 months of age. Time to half relaxation increased significantly from 3 to 6 and from 3 to 12 months. Maximum rate of tension decline decreased from 3 to 6 and from 3 to 12 months. No difference in resting tension was noted among any group. Isotonically, peak shortening and time to peak shortening increased from 1 to 3 months of age. Time to half re-lengthening increased from 3 to 6 and from 3 to 12 months of age. No difference in peak shortening velocity, peak relaxation velocity and relative change in muscle length was noted among any groups. CONCLUSION--The maturation affects the mechanical performance of cardiac muscle.

Eletromiografia dos músculos temporal e masseter em crianças com mordida cruzada posterior direita

This study proposal was to evaluate the changes at a masticatory muscle temporalis and masseter, through a eletromyographic, at ponters of the right unilateral bite posterior, verifying the difference at the eletric activity between right and left sides. Twenty female volunteers, with ages between 7 and 8 (x = 7.4). The eletromyographics signals were collected in both sides in all volunteers in rest situations and in an usual isotonic mastication, right, left and bilateral and the maximun isometric constriction, which sinal was used to the eletric activity amplitude normalization. The results signed that the right masseter muscle presents an expressive statistic difference, if compared with the left masseter muscle during the left and right mastication, suggesting a right unilateral mastication. The muscle haven't gotten any expressive variance in this amplitude which remained to a proximate flat noticed in a right and habitual mastication, suggesting a right and one sided mastication during the left mastication occurs a raise of the eletric signal amplitude of the muscle left masseter. The right masseter muscle haven't gained any expressive variance, which remained in a proximate flat observed in an usual and right mastication, suggesting a muscular pattern hyperfunction next to the dental crossing.

Resistência da parede abdominal após a remoção cirúrgica dos músculos retos abdominais: estudos experimental em ratos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise do Comportamento Eletromiográfico dos Músculos Estabilizadores Primários e a Relação com a Capacidade Física Funcional de Indivíduos Assintomáticos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito do tabagismo passivo e do exercício físico associado sobre a expressão de transportador de glicose GLUT4 em músculos de ratos

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

Atividade eletromiográfica dos músculos eretores da espinha durante contração isométrica contínua em diferentes níveis de carga: efeito de um protocolo de treinamento de resistência isométrica

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise da expressão gênica de MyoD, MRF4, miogenina e miostatina nos músculos Bíceps femoris e Gastrocnemius lateralis em duas linhagens de Gallus gallus (corte e postura)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito da inflamação do tornozelo sobre as características histológicas, a expressão gênica e níveis da creatina cinase nos músculos sóleo e tibial anterior de ratos diabéticos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação da força mastigatória e da atividade eletromiográfica dos músculos masseter e temporal em função de diferentes tratamentos reabilitadores

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização histológica e bioquímica dos músculos longissimus dorsi e semitendinosus de bubalinos mediterrâneo abatidos em diferentes pesos

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