Propriedades mecânicas de três fios de sutura no reparo do tendão do músculo flexor profundo do dedo de cães

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

Efeito da nutrição da ovelha e do cordeiro sobre o perfil de ácidos graxos do músculo Triceps brachii de cordeiros

O experimento foi realizado com o objetivo de avaliar o efeito da suplementação da ovelha 30 dias antes do parto, da idade à desmama (45 ou 60 dias) dos cordeiros e do sistema de terminação (em confinamento dieta total ou feno) ou a pasto sobre o perfil de ácidos graxos do músculo Triceps brachii de cordeiros machos não-castrados. O animais foram abatidos com 30 kg de peso corporal ou aos 150 dias de idade. Os cordeiros terminados em confinamento alimentados com feno foram abatidos pela idade e os demais pelo peso corporal. Os teores dos ácidos graxos C15:0, C16:0, C17:0, C16:1, C18:1 e C18:3 no músculo diferiram entre os sistemas de terminação dos cordeiros. O músculo dos cordeiros alimentados com dieta completa apresentou maiores valores de C16:0, C16:1 e C18:1, enquanto o músculo daqueles alimentados com feno e em pastagem apresentou maiores teores de C18:3. A dieta alterou o perfil de ácidos graxos no músculo dos cordeiros. A suplementação das ovelhas 30 dias antes do parto e a idade a desmama não afetaram o perfil de ácidos graxos.

Músculo esquelético, insuficiência cardíaca crônica e o papel do exercício

Patients with chronic heart failure (CHF) show metabolic, hemodynamic and skeletal muscle alterations, which decrease the life expectancy. These alterations are attributed to several factors. The focus of this review was to approach the questions related to physiological, metabolic, morphological and molecular alterations which affect the muscular system of these patients. Later, it was discussed the benefits of physical exercise to this syndrome as well as the pharmacological interventions, which are in investigation aiming the treatment of the same. Some muscle alterations are already described on the literature. For example, the more predominance of type II fibers, lower oxidative enzymatic activity, muscle atrophy and elevated concentration of cytokines that affect the muscle integrity. Thus, further studies involving cellular and molecular mechanisms of skeletal muscle in order to create strategies for prevention and treatment for patients with CHF are required

Morfologia e crescimento do músculo estriado esquelético no pirarucu Arapaima gigas Cuvier, 1817 (Teleostei, Arapaimidae)

The aim of this work was to evaluate the morphological, growth characteristics of skeletal muscle tissue III Pirarucu (Arapaima gigas) using alevins (50 days old) and juveniles (1 year old). Muscle samples were collected from dorsal, lateral cranial mid lateral caudal regions, and then frozen in liquid nitrogen. Histological frozen sections (10 [mu]m) were stained with HE and Gomori Trichrome for morphological analysis, and NADH-TR to evaluate muscle fiber oxidative metabolism. Morphometric analysis samples were obtained from dorsal and lateral cranial regions, and the smallest-diameter white fibers were measured. White dorsal muscle was thicker, and two muscle fiber compartments were identified in the lateral cranial region: red (superficial) mid white (deep) muscle. Hyperplasia muscle growth predominated in alevins mid hypertrophy in juveniles.

Influência da pós-carga sobre a taxa de variação da tensão desenvolvida (dT/dt). Estudo em músculo cardíaco isolado.

PURPOSE: To evaluate the effects of afterload on peak rate of tension rise (dT/dt) in the isolated muscle. METHODS: Left ventricular papillary muscles from Wistar rats were studied in isometric and isotonic afterloaded contractions. Muscles were analised in Krebs-Henseleit solution with calcium concentration of 2.52mM at 28 degrees C. The resting muscle length (preload) was maintained constant. The peak isometric developed tension (DT) and dT/dt were measured during increases of afterload (25, 50, 75 and 100% from DT). RESULTS: A rise in afterload corresponding to 50, 75 and 100% of DT, did not cause an increase in dT/dt values (p > 0.05). The dT/dt value decreased (p < 0.05) when afterload was changed from 75% to 25% of DT. CONCLUSION: The data suggest that an increase in the afterload from 50% of the DT did not promote changes in the dT/dt.

Efeito do Nível de Energia da Dieta e da Exposição Prévia ao Calor sobre a Respiração Mitocondrial do Músculo Cardíaco de Frangos de Corte

This work was conducted aiming to evaluate the effect of dietary energy level and the previous heat exposure on the respiratory activity of the mitochondria from the cardiac muscle of broiler chickens. It was used broiler chickens (Hubbard) from both sexes and fed with diet containing 2900 kcal ME/kg or 3200 kcal ME/kg. The birds were heat stressed (35°C/4h) in the 1 st, 21 st and 42 nd days of age. The respiratory activity of mitochondria from cardiac muscle was evaluated in a Gilson oxygraph, model 5/6, by using alpha-ceto-glutaric as substrate and the ADP (adenosine-di-phosphate) to stimulate the respiratory activity. There was not effect of dietary energy level and previous heat exposure on the respiratory activity of the mitochondria from cardiac muscle. However, the females presented higher respiratory activity than males. By reason of the low oxidative capability of the heart muscle fiber of the male broiler chickens, these could be more sensitive to cardiac disease than females.

Anatomia do músculo abdutor crural caudal do gato doméstico (Felis catus domesticus, Linnaeus 1758)

The frequency and the morphology of the abductor cruris caudalis muscle were studied in 58 adult unknown breed cats. The sample included 36 females and 22 males. After the dissection, were found a frequency for the presence of the same muscle of 98.3%. The abductor cruris caudalis muscle appears symmetrically in 35 females (97.2%) and 22 males (100.0%). When present, it were originated on the transversal process of the 1st vertebrae caudales, in the glutea region, below the gluteus superficialis muscle, throughing almost all the thigh under biceps femoris muscle, where it make a parallel relation with the sciatic nerve, receiving nervous ramifications of the same in 78.3% of the cases. The medium found for the width and thickness of his muscle venter was respectively of 2.03 mm and 0.35 mm. Its insertion occurs on the biceps femoris muscles approximate to the fascia cruris, where both finish fusing theirselves.

Abscesso do músculo psoas em paciente submetida à analgesia por via peridural. Relato de caso

BACKGROUND AND OBJECTIVES: Psoas muscle abscess is a rare complication of epidural analgesia. The adequate approach to this complication is fundamental for a good resolution. The objective of this report was to discuss the diagnosis and treatment of psoas muscle abscess. CASE REPORT: A female patient, 65 years old, with neuropathic pain in the lower limbs, difficult to control with systemic drugs. The patient was treated with epidural opioid and local anesthetic as an alternate treatment. Twenty days after the continuous epidural administration, the patient complained of lumbar pain, headache, and fever. A CT scan of the pelvis showed an abscess of the psoas muscle, thus, closed drainage and antibiotics were indicated. CONCLUSIONS: An adequate, continuous supervision of the patient is necessary when an epidural catheter is placed, and it should continue after its removal. © Sociedade Brasileira de Anestesiologia, 2007.

Implante de tendão autógeno do músculo flexor superficial dos dedos no reparo de desvio do pênis de bovines

In this experiment, 18 hybrid steers, from the ages between 16 and 20 months, were submitted to the removal of the penis apical ligament to provoke a penis deviation. After passed 30 days, to be tested, the animals were put together to the females that were in heat. It was verified the formation of the ventral and right lateral penis deviation with incapacity of the copula. The bovines were submitted to the autologous implant from the one following superficial portion tendon from the superficial flexor fingers muscle, on the top of albuginea tunic, replacing the apical penis ligament removed. The material implanted was well tolerated, appearance a few inflammatory cells and formation of the fibrous conjunctive tissue, causing resistant adherence and capacity of sustaining the free penis extremity. The bovines, when were among the females that were in heat, did not show a penis deviation nor sexual behavior modification. The method revealed itself satisfactory and it can be indicated to correct ventral and right lateral penis deviation in bovines.

Morfologia e morfometria dos tipos de fibras do músculo reto abdominal de cadelas (canis familiaris) durante a gestação

The present paper deals with the evaluation of morphological and morphometric alterations of slow-twist (I) and fast-twitch (II) fibers of rectus abdominis muscle of adult female dog during pregestational phase, at 30 and 60 days of pregnancy and at 30 days after the parturition. At the every phases, using the open biopsy technique, muscle samples were collected. The samples were plunged. Histological sections were cut in a microtome. For general morphology, some sections were stained with HE. Subsequent sections were reacted for myofibrillar ATPase (m-ATPase), after alkaline (pH 10.4) and acid (pH 4.4) pre-incubations, in order to identificate type I and II fibers. In the pre-gestational phase, muscle tissue revealed to be composed by fibers with different diameters, presenting polygonal outlines and one or more periphery nuclei. At 30 days of pregnancy, muscle fiber characteristics were similar. At 60 days, in addition to the existence of normal fibers, polymorphic and small diameter fibers were frequent. At 30 days after the parturation, the morphology of muscle fiber were similar to that observed in the pre-gestational phase. In the four phases, type II fiber diameters were lager than type I. The diameters of both fiber types showed a significant reduction in the 30 days phase and a significative increasing at 60 days. The expansion of the abdominal wall during the pregnancy represents a chronic stimulus, induced changes in the morphology and in the fiber type diameters.

Ramificação e distribuição dos nervos frênicos no músculo diafragma do gato doméstico

The ramification and the distribution of the phrenic nerves right and left had been studied in 30 muscles diaphragms of unknown breed adult domestic cats, 7 males and 23 females, and were fixed in 10% buffered formalin solution. After fixation and dissection, it was observed that the phrenic nerves ramified for the respective carnous parts of the muscle diaphragm, pars lumbalis, costalis and sternalis, and had finished in higher frequency in dorsolateral trunk and ventral branch (63.33%). We observed the following arrangements: dorsal, ventral and lateral branches (25.0%); dorsal branch and ventrolateral trunk (6.66%); dorsolateral and ventrolateral trunks (3.33%); dorsolateral trunk, lateral and ventral branches (1.66%). The phrenic nerves had distributed symmetrically in 11 samples (36.66%), only showing the termination in dorsolateral trunk and ventral branch. The dorsal branches supplied pars lumbalis (73.33% to right and 56.66% to the left) and pars costalis (13.33% to right and 10.0% to the left). The right dorsal branch supplied the crus mediale dexter of the right pillar (100.0%) and the left dorsal branch supplied the crus mediale sinister of the right pillar and the left pillar (100.0%). The lateral branches supply pars lumbalis (23.33% to right and 33.33% to the left), pars costalis (96.66% to right and 100.0% to the left) and pars sternalis (3.33% only to the right). The ventral branches supplied the ventral region of pars costalis (46.66 % to right and 43.33% to the left) and pars sternalis (96.66% to right and 100.0% to the left). Four female animals (13.33%) had shown fibers crossing proceeding from the left ventral branch for right antimere had been that in one of these samples (3.33%) occurred connection between the left ventral branch and the right.

Estudo biomecânico do reparo do tendão do calcâneo com retalho da fáscia miotendinosa do músculo gastrocnêmio em coelhos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeitos da imobilização, remobilização livre e por meio de exercício físico sobre as propriedades mecânicas histológicas do músculo de ratos de duas faixas etárias

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo do músculo gastrocnêmio em ratos exercitados submetidos a suplementação de monoidrato de creatina

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ação do ultra-som terapêutico no processo de regeneração do músculo esquelético

Pós-graduação em Ciências da Motricidade - IBRC