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Ubicación de la Zona de Inervación del Músculo Flexor Corto del Pulgar en Individuos Sanos de Ambos Sexos International Journal of Morphology
Guzmán,Rodrigo A; Bralic Echeverria,María Pilar; Cordero Garayar,José.
El músculo flexor corto del pulgar (FCP) se localiza en la eminencia tenar y tiene un importante rol en las funciones del dedo pulgar. Existen escasos antecedentes acerca de la distribución de las zonas de inervación (ZI) de este músculo y las posibles diferencias entre individuos de diferente sexo. El conocimiento de la localización de las ZI del FCP podría ser de ayuda en el tratamiento de la mano espástica, sirviendo para definir el sitio de inyección de la toxina botulínica. El objetivo de esta investigación fue describir las ubicaciones de las ZI del FCP usando electromiografía de superficie, y hacer una comparación entre individuos de sexo masculino y femenino. Treinta jóvenes voluntarios sanos, participaron en este estudio (15 hombres: 21.5 ± 2.6...
Tipo: Journal article Palavras-chave: Unidad Motora; Zona de Inervación; Punto motor; Flexor corto del pulgar.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200014
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Ulnar and Humeral Heads Forming Separate Bellies: A Rare Case of Digastric Flexor Carpi Ulnaris Muscle International Journal of Morphology
Rao K. G,Mohandas; Bhat,Seetharama M; Venkataramana,V; Rodrigues,Vincent.
Proper knowledge of muscular variations is essential for both anatomists and surgeons. Variations of the flexor carpi ulnaris (FCU) are not very common. We are reporting an unusual case of FCU muscle with two bellies. The two heads (ulnar and humeral) of the muscle continued as two separate bellies and the tendons of which joined each other slightly proximal to the wrist before getting inserted to pisiform bone. Further, detailed literature review of variations of FCU muscle is done and the developmental basis for the variation and its surgical importance are discussed.
Tipo: Journal article Palavras-chave: Flexor carpi ulnaris muscle; Variations of forearm muscles; Ulnar head; Humeral head.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000100005
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Ultrasonic 3D Reconstruction and Measurement of Lacrimal Sac in Normal Adult Chinese Population International Journal of Morphology
Tao,Hai; Liu,Xiaohang; Mei,Xi; Han,Cui; Wang,Peng; Bai,Fang.
To apply the ultrasonic 3D reconstruction method to measure the anatomic image data of lacrimal sac in the normal adult Chinese population, providing imaging anatomical basis for the clinical diagnosis and treatment of lacrimal duct diseases. 80 volunteers without lacrimal duct diseases were enrolled. The GE Voluson E8 ultrasonic diagnostic apparatus was used, with gynecological intracavitary probe (frequency: 5 ~ 12MHz) for the examination and measurement. Each datum was repeated three times for the average value. Among the 80 eyes, the lacrimal sacs of 74 eyes exhibited the clear imaging, with the imaging rate as 92.5 %. the vertical diameter of lacrimal sac cavity (LSC): 13.3±2.2 mm; anteroposterior diameter: 6.0±1.1 mm; trans diameter: 4.9±0.9 mm; the...
Tipo: Journal article Palavras-chave: Lacrimal sac; Ultrasonic 3D reconstruction; Imaging anatomy.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000400030
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Ultrastructural Analyses of Platelets and Fibrin Networks in BALB/c Mice after Inhalation of Spherical and Rod-Shaped Titanium Nanoparticles International Journal of Morphology
Oosthuizen,Maria Aletta; Pretorius,Etheresia; Oberholzer,Hester Magdalena; van der Spuy,Wendy Jeannette.
Engineered nanoparticles are designed to perform specific functions and therefore have specific properties that could potentially be harmful. Nanoparticles such as titanium dioxide have the potential to become transparent and are therefore widely used in cosmetic products and sunscreen. Research on the toxicity of nanoparticles is of utmost importance and numerous in vitro studies have shown that some of these particles could have adverse health effects. The current study aimed to investigate the in vivo effects of two different titanium nanoparticles at two different concentrations after inhalation by experimental BALB/c mice. This was done to determine whether these particles will cause an inflammatory reaction, visible as alterations in platelet and...
Tipo: Journal article Palavras-chave: Nanoparticles; TiO2; Platelets; Fibrin; BALB/c murine model.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400044
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Ultrastructural Analysis of Masseter and Left Medial Pterigoid Muscles, After Unilateral Mandibular Molar Extraction: Experimental Study International Journal of Morphology
Benigno,Maria Ivone Mendes; Liberti,Edson Aparecido; Conde Jr,Airton Mendes; de Sousa Leal,Noélia Maria; Lopes Rodrigues,Karla Emanuelle; Mota,Vanessa Benigno; Amstalden,Eliane Maria Ingrid.
Twelve adult male Wistar rats (220 g average weight) were divided in 3 experimental groups: GI -15. GII ­ 30 and GIII ­ 60 days, after mandibular molar extraction, with three experimental animals and one control per group. Qualitatively, ultrastructural changes of protein filaments from myofibrils of these muscles and ipsilateral to the extractions were observed. Ultrastructure asymmetry and disorganization of Z line and I band, in the experimental group GII, of Medial Pterigoid muscle (MPT) were observed. The temporomandibular dysfunction, stimulated by the unilateral extractions of mandibular molars in rats may lead to modifications in the Z line and I band, which showed to be sensitive to this dysfunction. Changes in the MPT muscle, probably related to...
Tipo: Journal article Palavras-chave: Skeletal muscular fibre; Masticator muscles; Occlusal alterations; Temporomandibular joint; Transmission electron microscopy.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200007
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ULTRASTRUCTURAL ANALYSIS OF PINEALECTOMY AND LACK OF LIGHT INFLUENCE OVER COLLAGEN IN THE ENDOMETRIUM OF RATS International Journal of Morphology
Pinto de Medeiros,Juliana; Wanderley Teixeira,Valéria; Aguiar Coelho Teixeira,Álvaro; Baratella Evêncio,Liriane; Evêncio Neto,Joaquim.
Some studies have shown that pinealectomized female rats present a large concentration of collagen fibers in the endometrium. The lack of light results in morphologic alterations in the uterine lamina propria and in the muscular layer, reducing thus the uterine weight. Therefore, this work aimed to analyze ultra-structurally the influence of melatonin in the remodeling of the collagen in the endometrium, in the estrus phase, in pinealectomized adult rats or submitted to lack of light. The experimental groups: I- sham-pinealectomized maintained in a clear/dark cycle 12/12 hours, during three months; II- pinealectomized rats maintained in a clear/dark cycle 12/12 hours, for three months; III- normal rats maintained in clear/dark cycle 12/12 hours for three...
Tipo: Journal article Palavras-chave: Melatonin; Endometrium; Pinealectomy; Collagen.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022003000300008
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Ultrastructural and Immunohistochemical Effects of Aqueous Leave Extract of Xylopia aethiopica on the Stomach in Streptozotocin-Induced Diabetic Rats International Journal of Morphology
Ofusori,D. A; Komolafe,O. A; Adewole,O. S; Arayombo,B. E; Margolis,D; Naicker,T.
Gastrointestinal pathology in diabetic patients has become a source of concern in recent times. The aim of this study was to investigate the ultrastructural and immunohistochemical effects of aqueous leaf extract of Xylopia aethiopica on the stomach in streptozotocin-induced diabetic rats. This study was conducted using thirty adult Wistar rats. The animals were divided into three groups (n= 10). Group A was the control animals (administered with equivalent volume of citrate buffer), group B was diabetic animals induced by a single intraperitoneal injection of streptozotocin dissolved in citrate buffer (65 mg/kg) and group C was diabetic animals treated with 200 mg/kg body weight of aqueous leave extract of X. aethiopica for twenty five days. At the...
Tipo: Journal article Palavras-chave: Diabetes mellitus; Immunohistochemistry; Ultrastructure; Stomach; Xylopia aethiopic.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100006
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Ultrastructural Aspects of Spermatids in Isogenic Black Mouse C57BL6J International Journal of Morphology
Fernandes Boaro Martins,Márcia Regina; Carvalho Pinto e Silva,José Ricardo de.
The objective of this study was to describe some changes in spermatids differentiating events during spermiogenesis, leading to spermatozoa final formation. The animals were sacrificed with ethylic acid inhalation and, then, testis fragments were collected, fixed in Karnovsky and post-fixed in osmium tetroxide. After dehydration, the sections were stained with uranyl acetate 2%. It was observed in early spermatids at Golgi phase, formation of acrosomal granule contained in the acrosomal vesicle, spheroidal nucleus with rugous reticulum around it, and Golgi apparatus made up of lamellae and vesicular structures. At cephalic hood phase, the granule suffers flattening and the marginal fossa is formed. In both phases, it was possible to observe the presence of...
Tipo: Journal article Palavras-chave: Spermiogenesis; Spermatids; Mice.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022005000400007
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Ultrastructural Aspects of Spermatogenesis in Phalloceros caudimaculatus (Teleostei, Poeciliidae) International Journal of Morphology
Vicentini,Carlos Alberto; Muñoz,Mario Esteban; Vicentini,Irene Bastos Franceschini.
The aim of the present study was to analyze the ultrastructural aspects of spermatogenesis in Phalloceros caudimaculatus, during cell proliferation. The parenchyma is organized morphologically as lobular restricted spermatogonial testis. Spermiogenesis in this species is characterized by four morphological stages of development (spermatids S1 through S4). The mature spermatids and spermatozoa heads are situated at the periphery of the cyst surrounded by the cytoplasm of the Sertoli cells. The germ cell's ultrastructure and spermatogenesis in P. caudimaculatus are very similar to that of other poeciliids.
Tipo: Journal article Palavras-chave: Spermatogenesis; Ultrastructure; Poeciliidae; Phalloceros caudimaculatus.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300047
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Ultrastructural Changes in the Kidney Cortex of Rats Treated with Lead Acetate International Journal of Morphology
Deveci,E; Söker,S; Baran,Ö; Tunik,S; Ayaz,E; Deveci,S.
The purpose of this study was to investigate the ultrastructural effects of lead on the kidney cortex of rats. Wistar Albino rats (180-200g body weight) were divided into a controlled and lead acetate-exposed group. Rats received lead acetate at 500 ppm in their drinking water for 60 days. Both groups were fed with the same standard food, but lead acetate was added to the drinking water. During the experimental period, blood samples were taken from the abdominal aorta of the anesthetised animals. At the end of exposure, body weight and blood lead levels were measured. The kidney tissue samples were prepared and analyzed by light and transmission electron microscopy. Cortical renal tubules show various degenerative changes with focal tubular necrosis...
Tipo: Journal article Palavras-chave: Lead acetate; Kidney cortex; Ultrastructural changes.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300067
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Ultrastructural Changes in the Placental Membrane in Pregnancies Associated with Diabetes International Journal of Morphology
Verma,Ranjana; Mishra,S; Kaul,Jagat Mohini.
Placenta is the most accurate record of the infant prenatal experience. If the placenta is examined minutely after delivery, it provides much insight into the prenatal health of the baby and the mother. The weight of placenta is higher in diabetic pregnancy in comparison to the normal pregnancy. To study the cellular changes that might contribute to more weight of placenta in diabetic pregnancies, light microscopic and electron microscopic analysis was performed. Twenty singleton pregnancies complicated with Gestational diabetes mellitus (12 controlled on diet, 8 controlled on insulin) were selected and compared to control group. Tissue sections were processed and analyzed. The placenta of diabetic pregnancies showed no abnormality on gross observation but...
Tipo: Journal article Palavras-chave: Gestational diabetes mellitus; Transmission electron Microscopy; Placental membrane.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400056
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Ultrastructural Characterization of the Pars Distalis of the Indian Female Sheath-Tailed Bat, Taphozous longimanus (Hardwicke) International Journal of Morphology
Nerkar,Archana A; Gadegone,Mohan M.
The present ultrastructural observations demonstrate the presence of six cell types in the pars distalis of non-pregnant and pregnant bats of Taphozous longimanus. In the pars distalis of T. longimanus, STH cells are round to oval with eccentrically placed nucleus, numerous secretory granules and well developed Golgi indicate a cell under vigorous synthetic activity while those filled with secretory granules with reduced Golgi complex suggest reserve or storage state of cells. LTH cell is characterized by the large secretory granules, dilated endoplasmic reticulum and numerous mitochondria in the cytoplasm which indicate that these cells are hypertrophied and synthetically very active during pregnancy. ACTH cells are found either singly or in groups and...
Tipo: Journal article Palavras-chave: Bat; Pars distalis; Ultrastructure; Pregnancy.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300021
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Ultrastructural Effects of the Propineb on Brain of Fetuses During Rat Pregnancy International Journal of Morphology
Ekinci,C; Tahaoglu,A. E; Yavuz,D; Deveci,E; Aktas,A; Yilmaz,T; Yumusak,Ö; Yükselmis,O.
Propineb is a fungicide with a propylene-bis-dithiocarbamate structure. Pregnant Wistar rats were exposed to 400 ppm propineb concentrations in 5 ml distilled water, 5 days per week until the end of pregnancy. The rats were treated with propineb for 16 days and the brains of litter rats were sacrificed at first day of birth after which their brains were collected. Ultrastructural examination of the brains of the fetuses and propineb-treated pregnant females revealed a variety of histopathological effects. We suggest that mitochondrial damage may be an effective factor for neuron necrosis. These results supported the proposal that the exposure to fungicides such as propineb and to other naturally occurring compounds which inhibit mitochondrial function, may...
Tipo: Journal article Palavras-chave: Propineb; Electron microscopy; Neonatal rats; Brain.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000400054
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Ultrastructural Evidences for Endothelial Cell - Leukocytes Interactions: Margination and Migration International Journal of Morphology
Deveci,Engin; Deveci,Ienay.
Leukocyte-endothelial cell interactions have a pivotal role in immune responses. In our study Ten adult wistar albino rats weighing 180-200 g were used to obtain tissue samples. The animals were sacrificed by decapitation under ether anesthesia. The lymph nodes of the animals were then quickly removed. Specimens were immersed in the zinc iodide-osmium tetroxide (ZIO) solutation by Niebauer et al. (1969) and kept in the dark for 2 hours in this solution from temperature for fixation/staining. Samples were processed according to routine plastic embedding tecnique. Semithin sections of 1µm thick were cut and stained with methilene blue-azure II for light microscopic examination. We used zinc iodide-osmium tetroxide staining tecnique to distinguish endothelial...
Tipo: Journal article Palavras-chave: Leukocytes; Margination; Migration.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300037
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Ultrastructural Features of Ovary of the Female African Giant Rat (Cricetomys gambianus, Waterhouse) During Oestrous Cycle International Journal of Morphology
Akinloye,Adebayo Koyuum; Oke,Bankole Olusiji.
Fine structures of the ovary during the oestrous cycle in African giant rats (Cricetomys gambianus Waterhouse) were described in the present study. Ultrastructural features of the germinal epithelium and the medullar of the ovary were similar at different stages of the oestrous cycle. During mid proestrus, there was disorganization of the inner layer of the granulosa cells of secondary follicles to form the antrum. At late proestrus/early estrus, antrum formation had advanced and there was evidence of reorganization of granulosa cells. Fine structures of the ovary during mid estrus include follicles with variably shaped mitochondria, profiles of Golgi complexes and dense concentration of ribosomes. The theca interna shared similar ultrastructure with the...
Tipo: Journal article Palavras-chave: Ultrastructure; Ovary; Oestrous Cyclei; African Giant Rat.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200030
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Ultrastructural Identification of Circovirus in the Liver of Saffron Finch (Sicalis flaveola spp.) International Journal of Morphology
Catroxo,M. H. B; Martins,A. M. C. R. P. F; Melo,N. A; Milanelo,L; Petrella,S; Fitorra,L. S; Petri,B. S. S.
Circovirus are viral agents that cause disease in avian species. The main clinical symptoms of the disease are immunosuppression and, in young birds feather disorders. In neonates, the disease is known as "black spot" and characterized by abdominal enlargement, hepatobiliar congestion and failure to thrive. Also, it wasobserved in adult infected birds with other symptoms and clinical signs, such as enteritis, sinusitis, rhinitis, tracheitis, bronchopneumonia, myocarditis, nephritis, splenitis, dyspnea, anorexia, depression leading to high mortality. In April 2008, 317 saffron finch were apprehended during an illegal commercialization and were forwarded to the Wild Animals Recovery Center of the Tiete Ecological Park. Subsequently, 101 (31.66%) died and 20...
Tipo: Journal article Palavras-chave: Avian circovirus; Canaries; Sicalis flaveola spp.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000200039
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Ultrastructural Study of Bovine Papillomavirus During Outbreaks in Brazil International Journal of Morphology
Catroxo,M. H. B; Martins,A. M. C. R. P. F; Petrella,S; Souza,F; Nastari,B.D.B.
Papillomaviruses, belonging to the Papillomaviridae family, are small oncogenic viruses, causing papillomas and fibropapillomas in the mucosal and cutaneous epithelia of several animals. In bovine species, thirteen types (BPV 1-13) were characterized to date. In this study, the occurrence of papillomatosis in four outbreaks in cattle herds, coming from Brazilian states were registered. The papillomatous lesions were found located in the teats, udders, head and neck. Under the transmission electron microscope, by the negative staining technique, it was possible to visualized rounded-format papillomavirus, with icosahedral symmetry, characterized as "full" and "empty" particles, measuring on average 60 nm in diameter, in all the 40 samples observed of skin...
Tipo: Journal article Palavras-chave: Papillomavirus; Cattle; Transmission Electron Microscopy.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200068
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Ultrastructural Study of Poxvirus Causing Myxomatosis in Rabbits, in São Paulo and Santa Catarina, Brazil International Journal of Morphology
Catroxo,M. H. B; Bersano,J. G; Martins,A. M. C. P. F; Petrella,S; Portugal,M. A. S. C; Souza,O. S.
The myxomatosis is a contagious worldwide disease caused by poxvirus which infects domestic and wild rabbits. In the present study we present two distinct outbreaks of myxomatosis when raising rabbits, one for commercial purpose of production of meat and skins and, another one for the commercialization of ornamental rabbits. The observed signs were ocular, auricular, nasal, testis lesions and many times scattered throughout the body of the animals. The lesions were characterized by formation of nodules that by palpation disclosed gummy or gelatinous aspect. At the transmission electron microscopy, all the skin and crust samples were analyzed by negative staining technique. A great number of particles with morphology similar to the poxvirus, some enveloped...
Tipo: Journal article Palavras-chave: Myxomatosis; Poxvirus; Rabbits; Transmission electron microscopy.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200039
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Ultrastructural Study of Spermatogenesis in Eisenia foetida (Annelida, Oligochaeta) International Journal of Morphology
Rolando,A.; Romanini,M. C.; Mugnaini,M. T.; Bozzo,A.; Pastorino,I.; Soñez,C. A..
Spermatogenesis and the spermatozoon ultrastructure follow a common pattern in terrestrial oligochaetes. However, many of their characteristics are distinctive of each species and they are of great importance for phylogenetic and taxonomic studies. Germinal cells were studied through conventional electronic microscope techniques in order to go deep on spermatogenesis, especially on the mature spermatozoon ultrastructure of Eisenia foetida. Spermatogenesis occurs in seminal vesicles and follows a pattern comparable to that of some other oligachaetes species. Spermatozoon ultrastructural details revealed that it is a filiform cell, with the acrosome placed in anterior position, followed by the nucleus, the midpiece and the tail which flagellum has a 9+2...
Tipo: Journal article Palavras-chave: Oligochaeta; Spermatogenesis; Ultrastructure; Spermatozoa; Eisenia.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200005
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Ultrastructural Study of the Denervated Diaphragm in Rats International Journal of Morphology
Torrejais,M. M; Soares,J. C; Matheus,S. M. M; Mello,J. M; Francia-Farje,L. A. D; Jeronimo,L. C; Vicente,E. J. D.
The structural alterations that occur in the muscle fibers of denervated rat diaphragms were studied. Fifteen adult male albino rats (Rattus norvegicus) with a mean weight of 200 g and about 60 days of age were used. Chronically denervated diaphragms were obtained and the animals were sacrificed after 4, 8 and 12 weeks of denervation. The left antimere of the diaphragm was denervated by sectioning of the phrenic nerve and the right antimere served as control. Each antimere was divided into fragments, which were used for analysis transmission electron microscopy. During the initial phase of denervation (4 weeks), ultrastructural muscle modifications appeared in scattered fibers and in foci along these fibers. Muscle fibers with foci of less dense and...
Tipo: Journal article Palavras-chave: Denervation; Diaphragm; Muscle fiber; Ultrastructural; Rat.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300025
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