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Search Results: 1 - 10 of 28939 matches for " Richard Halti; Andrade "
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An Unusual Anatomical Variation of the Levator Scapulae Muscle Una Variación Anatómica Inusual del Músculo Elevador de la Escápula
Gabriel Varj?o Lima,Richard Halti Cabral,Danilo Leite Andrade,Nayara Soares de Oliveira Lacerda
International Journal of Morphology , 2012,
Abstract: Clinical and surgical importance of the levator scapulae muscle (LSM) requires a better knowledge of its anatomic variation mainly because of the possibility of new findings related to the embryologic development. This article reports a case of a left-sided LSM with atypical attachments in a 58-year-old preserved Caucasian female body. The muscle presented a bifurcation at its midpoint downward path. Its medial band attached to the anterior aspect of the left rhomboideus major muscle while its left band was fixed in the superior angle of the scapula after releasing a muscle expansion to the serratus anterior muscle. The morphometric analysis revealed LSM maximal width of 3.6 cm, bifurcation point located 6.6 cm apart from the C1 vertebral attachment; medial band legth of 5.7 cm and lateral band width of 2.1cm. Regarding anatomic variations of the LSM, they may remain unnoticed or perhaps contribute for pathologic conditions of the neck and the back. Debido a la importancia clínica y quirúrgica del músculo elevador de la escápula, se hace necesario conocer mejor sus variaciones, principalmente la posibilidad de encontrar hallazgos relacionados con su desarrollo embriológico. Se presenta el caso de un músculo elevador de la escápula del lado izquierdo encontrado en un cadáver de sexo femenino de 58 a os. El músculo elevador de la escáula presentaba una bifurcación en el punto medio en su trayectoria más baja. La banda medial se fijaba en la parte anterior del músculo romboides mayor izquierdo; mientras que su banda lateral se fijaba en el ángulo superior de la escápula después de enviar una expansión hasta el músculo serrato anterior. El análisis morfométrico reveló un ancho máximo de 3,6 cm, punto de bifurcación situado 6,6 cm bajo la inserción vertebral C1; longitudes de la banda medial 5,7 cm y lateral de 2,1cm. Las variaciones anatómicas del músculo elevador de la escápula pueden pasar inadvertidas, pero también pueden contribuir con algunas condiciones patológicas del cuello y espalda.
An Unusual Anatomical Variation of the Levator Scapulae Muscle
Varj?o Lima,Gabriel; Cabral,Richard Halti; Andrade,Danilo Leite; Lacerda,Nayara Soares de Oliveira; Araújo,Vital Fernandes; Masuko,Telma Sumie;
International Journal of Morphology , 2012, DOI: 10.4067/S0717-95022012000300016
Abstract: clinical and surgical importance of the levator scapulae muscle (lsm) requires a better knowledge of its anatomic variation mainly because of the possibility of new findings related to the embryologic development. this article reports a case of a left-sided lsm with atypical attachments in a 58-year-old preserved caucasian female body. the muscle presented a bifurcation at its midpoint downward path. its medial band attached to the anterior aspect of the left rhomboideus major muscle while its left band was fixed in the superior angle of the scapula after releasing a muscle expansion to the serratus anterior muscle. the morphometric analysis revealed lsm maximal width of 3.6 cm, bifurcation point located 6.6 cm apart from the c1 vertebral attachment; medial band legth of 5.7 cm and lateral band width of 2.1cm. regarding anatomic variations of the lsm, they may remain unnoticed or perhaps contribute for pathologic conditions of the neck and the back.
The Occurrence of the Plantaris Muscle and its Muscle-Tendon Relationship in Adult Human Cadavers
Arag?o,José Aderval; Reis,Francisco Prado; Guerra,Danilo Ribeiro; Cabral,Richard Halti;
International Journal of Morphology , 2010, DOI: 10.4067/S0717-95022010000100037
Abstract: twenty legs from adult male cadavers were examined to analyze the anatomical relationships between the component parts of the plantaris muscle. this muscle was present in all of the cadavers and it was found that the length of the muscle in relation to its belly was approximately three times greater than in relation to the tendon.
Myocardial revascularization with coronary endarterectomy. Stratification of risk factors for early mortality
Atik, Fernando Antibas;Dallan, Luís Alberto Oliveira;Oliveira, Sérgio Almeida de;Lisboa, Luiz Augusto Ferreira;Platania, Fernando;Cabral, Richard Halti;Jatene, Adib Domingos;
Arquivos Brasileiros de Cardiologia , 2000, DOI: 10.1590/S0066-782X2000001000002
Abstract: objective: to determine the risk factors for mortality related to myocardial revascularization when performed in association with coronary endarterectomy. methods: we assessed retrospectively 353 patients who underwent 373 coronary endarterectomies between january '89 and november '98, representing 3.73% of the myocardial revascularizations in this period of time. the arteries involved were as follows: right coronary artery in 218 patients (58.45%); left anterior descending in 102 patients (27.35%); circumflex artery in 39 patients (10.46%); and diagonal artery in 14 patients (3.74%). we used 320 (85.79%) venous grafts and 53 (14.21%) arterial grafts. results: in-hospital mortality among our patients was 9.3% as compared with 5.7% in patients with myocardial revascularizations without endarterectomy (p=0.003). cause of death was related to acute myocardial infarction in 18 (54.55%) patients. the most significant risk factors for mortality identified were as follows: diabetes mellitus (p=0.001; odds ratio =7.168), left main disease (<0.001; 9.283), female sex (0.01; 3.111), acute myocardial infarction (0.02; 3.546), ejection fraction <35% (<0.001; 5.89), and previous myocardial revascularization (<0.001; 4.295). conclusion: coronary endarterectomy is related to higher mortality, and the risk factors involved are important elements of a poor outcome.
Varia??es anat?micas do nervo ciático em um grupo de cadáveres brasileiros
Brooks, Joseph Bruno Bidin;Silva, Cristiano Augusto Cruz;Soares, S?nia Aparecida;Kai, Margareth Reiko;Cabral, Richard Halti;Fragoso, Yara Dadalti;
Revista Dor , 2011, DOI: 10.1590/S1806-00132011000400009
Abstract: background and objectives: the sciatic nerve is often involved in conditions of pain. it is a long nerve, prone to injuries that are the consequence of trauma, inflammation and entrapment. one possible cause of sciatic pain derives from the piriformis muscle, which maintains a very close anatomical relationship with the sciatic nerve. the objective of the present study was to evaluate the characteristics of the sciatic nerve and its relationship to the piriformis muscle in a group of brazilian cadavers. method: anatomical dissection of 40 human limbs with detailed studies of the sciatic nerve and the piriformis muscle. results: anatomical variations of the relationship between the sciatic nerve and the piriformis muscle were rare. data on the sciatic nerve length and width showed similar results to those from the literature. conclusion: the piriformis syndrome is a painful condition considered by many to be associated to anatomical variations of the relationship between the sciatic nerve and the piriformis muscle. the rarity of such variations, in the present series and in the studies published by other groups, suggests that the painful syndrome may often occur without the anatomical variations.
Head-on collision of unequal mass black holes: close-limit predictions
Zeferino Andrade,Richard Price
Physics , 1996, DOI: 10.1103/PhysRevD.56.6336
Abstract: The close-limit method has given approximations in excellent agreement with those of numerical relativity for collisions of equal mass black holes. We consider here colliding holes with unequal mass, for which numerical relativity results are not available. We try to ask two questions: (i) Can we get approximate answers to astrophysical questions (ideal mass ratio for energy production, maximum recoil velocity, etc.), and (ii) can we better understand the limitations of approximation methods. There is some success in answering the first type of question, but more with the second, especially in connection with the issue of measures of the intrinsic mass of the colliding holes, and of the range of validity of the method.
Shell sources as a probe of relativistic effects in neutron star models
Zeferino Andrade,Richard H. Price
Physics , 2000, DOI: 10.1103/PhysRevD.62.044032
Abstract: A perturbing shell is introduced as a device for studying the excitation of fluid motions in relativistic stellar models. We show that this approach allows a reasonably clean separation of radiation from the shell and from fluid motions in the star, and provides broad flexibility in the location and timescale of perturbations driving the fluid motions. With this model we compare the relativistic and Newtonian results for the generation of even parity gravitational waves from constant density models. Our results suggest that relativistic effects will not be important in computations of the gravitational emission except possibly in the case of excitation of the neutron star on very short time scales.
Excitation of the odd-parity quasi-normal modes of compact objects
Zeferino Andrade,Richard H. Price
Physics , 1999, DOI: 10.1103/PhysRevD.60.104037
Abstract: The gravitational radiation generated by a particle in a close unbounded orbit around a neutron star is computed as a means to study the importance of the $w$ modes of the neutron star. For simplicity, attention is restricted to odd parity (``axial'') modes which do not couple to the neutron star's fluid modes. We find that for realistic neutron star models, particles in unbounded orbits only weakly excite the $w$ modes; we conjecture that this is also the case for astrophysically interesting sources of neutron star perturbations. We also find that for cases in which there is significant excitation of quadrupole $w$ modes, there is comparable excitation of higher multipole modes.
Soil enzyme activities under long-term tillage and crop rotation systems in subtropical agro-ecosystems
Balota, Elcio Liborio;Kanashiro, Miriam;Colozzi Filho, Arnaldo;Andrade, Diva Souza;Dick, Richard Peter;
Brazilian Journal of Microbiology , 2004, DOI: 10.1590/S1517-83822004000300006
Abstract: agricultural practices that reduce soil degradation and improve agricultural sustainability are needed particularly for tropical/subtropical soils. no-tillage planting causes minimal soil disturbance and combined with crop rotation may hold potential to meet these goals. soil enzyme activities can provide information on how soil management is affecting the potential to perform the processes in soils such as decomposition and nutrient cycling. soil enzyme activities were investigated in a split-plot experiment (3 replications) where tillage (no till and conventional) was the main plot and crop rotation (soybean/wheat, s/w; maize/wheat, m/w or cotton/wheat, c/w) was the subplot. the experiment was established in 1976 in southern brazil. soil samples were taken at 0-5, 5-10 and 10-20 cm depths in 1997 and 1998. the 0-5 cm layer under nt system showed increases up 68% for amylase, 90% for cellulase, 219% for arylsulfatase, 46% for acid phosphatase, and 61% for alkaline phosphatase. there were significant correlations of soil enzyme activities with total organic c, and c and n microbial biomass. these results showed that nt increased microbial activity and that soil enzyme activity is a sensitive indicator of alteration soil quality by management.
PUMPCOM: um modelo para combina??o de curvas e análise do desempenho de bombas
Andrade, Camilo de L. T. de;Allen, Richard G.;Wells, Robin D.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2001, DOI: 10.1590/S1415-43662001000300007
Abstract: a computer model was developed to combine pump curves in series and in parallel and to determine the performance of the pump station and of individual pumps within the station. polynomial equations are fited to individual pump curves and to the combined pump station curve. cubic spline interpolation is employed to combine curves of pumps with different sizes. performance indicators of the station and of each pump within the station are calculated for the entire station flow rate range. a graphical interface allows the user to draw the pump station layout and to view the discrete data entered along with the equations fit. data entered, plots of the curves and equation coefficients can be printed out. pumpcom results were verified with spreadsheet calculations.
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