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Ultrastructural Study of the Neuromuscular Junctions of Extensor Digitorum Longus Muscle (M. extensor digitorum longus) of the Mice International Journal of Morphology
Boaro,Sueli N; Fragoso Neto,Raul A.
The neuromuscular junction of the extensor digitorum longus muscle of fingers was analyzed in 21 young (three months) and old (from six to 25 months) mice, from both genders. Morphologic changes were found throughout the mouse life, being more frequent and visible with aging. According with the data described in the literature consulted and the observations taken in this research, it becomes clear that a continuous process of morphological remodeling occurs in all neuromuscular ultrastructural junctions of the extensor digitorum longus muscle of fingers, during the life of the animal. Theses changes are characterized by figures of myelin in the cytoplasm of Schwann cells, pleomorphic and multivesiclar bodies, mitochondrias with morphologically altered...
Tipo: Journal article Palavras-chave: Neuromuscular junctions; Mice; Ultrastructure; Extensor digitorum longus muscle.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300045
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Ultrastructure Features of Coronary Artery Endothelium in Bactrian Camel (Camelus bactrianus) International Journal of Morphology
Yuan,Guoqiang; Pan,Yawen; Li,Haiyan; Wang,Jianlin.
Vascular endothelium play an essential role in regulating endothelial functions by maintaining normal vascular tone, modulating hemostasis, and preventing thromobogenesis. The aim of present study was to reveal ultrastructure features of coronary artery endothelium in Bactrian Camels by means of scanning electron microscope (SEM) technology. The results showed that the endothelial cells distribute along the direction of blood flow. Their morphology and protuberant degree towards luminal surface vary for different parts of the coronary artery. The luminal surface of a.c oronaria sinistra and a. coronaria dextra was covered by impaired and intact endothelium, respectively. Platelets and leukocytes sticking to the endothelium were found.
Tipo: Journal article Palavras-chave: Endothelial cells; Bactrian Camel; Coronary artery; Ultrastructure.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100040
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Ultrastructure of Fetal Mice Hepatocytes Exposed in Utero to Diazepam International Journal of Morphology
Márquez-Orozco,María Cristina; de la Fuente-Juárez,Graciela; Márquez-Orozco,Amalia.
Previous research has shown that fetal mice hepatic cells from females treated with diazepam (Valium) during pregnancy depict cytoplasmic and nuclear modifications when observed with photonic microscope. The purpose of this work is to investigate if diazepam administered subcutaneously (SC) to pregnant mice females induces ultraestructural alterations in the cytoplasmic organelles and nucleus to fetal hepatocytes. Transmission electron microscopy observations of fetal hepatocytes from pregnant females treated with a single daily dose of diazepam 2.7 mg/kg/bw/SC administered from 6th to 15th days of gestation revealed that they frequently presented disorganized and dilated rough endoplasmic reticulum cisterns, membranous elements, abundant Golgi complex and...
Tipo: Journal article Palavras-chave: Benzodiazepines; Diazepam; Fetal hepatocytes; Ultrastructure.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000400040
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Ultrastructure of the Myelinated and Unmyelinated Nerve Fibers of the Tongue Mucosa of Albinus Rat (Wistar) with Aging International Journal of Morphology
Grisolia,D. F.; Ogawa,K; Motoyama,A.A.; Kronka,M. C.; Carneiro Jr.,J. T.; Duro,C. C.; Watanabe,I.
The purpose of this paper was to study the sensory myelinated and unmyelinated nerve fibers found in the subepithelial lamina propria of tongue mucosa of aging rats. It was used the silver impregnation, transmission electron microscopy methods and morphometric measurements. The results revealed that subepithelial nerve fiber bundles of the anterior, medium and posterior regions of tongue were arise from deep muscular layer of tongue. The nerve fiber bundles were verified inside of the connective tissue of lamina propria. These nerve fibers branched several times and into the connective tissue papillae they form a single or ramified sensory nerve endings. The fungiform and vallate papillae contain numerous nerve terminals. The fine structure demonstrated...
Tipo: Journal article Palavras-chave: Nerve fiber; Myelinated fiber; Unmyelinated fiber; Tongue mucosa; Aging rat; TEM.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000400018
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Ultrastructure of the Secretory Epithelial Cells of the Bulbo-Urethral Glands (Cowper's gland) in the Indian Fruit Bat, Rousettus leschenaulti (Desmarest) During the Reproductive Cycle International Journal of Morphology
Nerkar,Archana A; Gujar,Maher P; Gadegone,Mohan M.
The present paper describes the ultrastructural characteristics of the bulbo-urethral gland (Cowper' glands) of the Indian fruit bat, R. leschenaulti during sexually inactive-breeding cycle. Cyclic histological changes during the seasonal breeding quiescence cycle are not well marked. There are no marked differences. The ultrastructural characteristic of the secretory epithelial cells of Bulbo-Uretrhal Gland gland have been studied during different phases of reproductive cycle. The secretory epithelial cells are characterized by the well-developed rough endoplasmic reticulum, extensive developed complexus golgiensis (Golgi apparatus) and mitochondria. Mitochondria with lamellate cristae are dispersed in the cytoplasm. Three different types of secretory...
Tipo: Journal article Palavras-chave: Chiroptera; Bat; Ultrastructure; Bulbo-urethral gland; Acini; Epithelial cells.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100035
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Ultrastructure of the Thyroid Gland in Adult West African Dwarf Goat (Capra hircus) International Journal of Morphology
Igbokwe,Casmir Onwuaso; Ezeasor,Daniel Nwagbo; Umar,Mohammed Bello.
The present study examined ultrastructure of the thyroid gland of adult West African Dwarf (WAD) goat in order to further understand the ultrastructural morphology and some of the changes in the components of the thyroid gland in goat with age. Thyroids glands obtained from fifteen adult WAD goats of different ages and sexes slaughtered at the local abattoirs were used in this study. Electron microscopic techniques were used to study the fixed tissue with emphasis on the follicular and parafollicular cells. The results showed that the ultrastructure is generally similar to that of some domestic animals. Follicular cells were cuboidal in young adult goats thyroids but were flattened in older goat thyroids of 5­7 years. These cells remarkably showed highly...
Tipo: Journal article Palavras-chave: Ultrastructure; Thyroid gland; Dwarf goat.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200020
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Una Propuesta de Evaluación Formativa en Ciencias Morfológicas International Journal of Morphology
Teruel,M; Felipe,A; Herrera,M; Dopazo,J; Díaz,M; Gómez,S; Eyheramendy,V; Guerrero,M.
La carrera de Medicina Veterinaria de la Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA) presenta un sistema de correlatividades estricto que conlleva a frecuentes retrasos académicos. El porcentaje de alumnos que aprobó la cursada 2009 (considerando la prueba parcial y sus instancias de recuperación) del curso Histología Embriología y Teratología fue menor al 80% con una tendencia descendente considerando el periodo 2006­2009. El objetivo del trabajo fue analizar si la implementación de cambios metodológicos que incluyeran actividades con principios de evaluación formativa, lograba mejorar la calidad del proceso enseñanza-aprendizaje. La propuesta incluyó: dictado de temas evaluados en los trabajos prácticos (TP) con la antelación...
Tipo: Journal article Palavras-chave: Evaluación Formativa; Enseñanza; Aprendizaje; Desempeño Académico; Ciencias Morfológicas.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000400014
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Understanding the Processus Vaginalis!: The Abdomino Scrotal Hydrocoele International Journal of Morphology
Rekha,Arcot; Ravi,A.
A knowledge of the embryology and descent of the testes is essential for all clinicians. Congenital hydrocoele, though an embryologic anomaly can present in adulthood. A abdomino scrotal hydrocole must be considered when a mass in the lower abdomen co exists with a scrotal hydrocoele.
Tipo: Journal article Palavras-chave: Embryologic anomaly; Processus vaginalis; Patent processus vaginalis; Abdomino scrotal hydrocoele.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100010
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Unilateral and Ipsilateral Strength Asymmetries in Elite Youth Soccer Players With Respect to Muscle Group and Limb Dominance International Journal of Morphology
Maly,Tomas; Zahalka,Frantisek; Mala,Lucia.
The purpose of study was to identify the presence of strength asymmetries (SA) in young elite soccer players in relation to muscle group (knee extensors (KE) and flexors (KF)) and limb preference (dominant vs. non-dominant limb). Forty-one U16 national team soccer players (mean age 15.7±0.3 years, body height 177.9±6.6 cm, body weight 68.2±7.9 kg) participated in this study. Assessments were performed on a Cybex Humac Norm isokinetic dynamometer in concentric contraction. We noted the degree of SAs in the bilateral ratio of quadriceps and hamstrings and in the ipsilateral ratio of the dominant (DL) and non-dominant (NL) legs. Bilateral deficits of KFs were higher (9.02­12.61 %) than those of KFs (6.32­7.15 %). The percentage of SA (>10 %) in knee...
Tipo: Journal article Palavras-chave: Muscular strength; Strength Asymmetries; Isokinetic testing; Soccer; Injury prevention.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000400027
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Unilateral Cryptorchidism in Nigerian Sahel Bucks International Journal of Morphology
Igbokwe,I. O; Grema,H. A; Ikpo,A. E; Mshelbwala,F. M; Igbokwe,N. A.
Out of 1608 Nigerian Sahel male goats (bucks) examined for cryptorchidism in an abattoir, 9 (0.6%) had right unilateral cryptorchidism. The coat colour-specific prevalence was highest among the brown bucks (2.1%); and was 0.8%, 0.6%, and 0.3% among black, white, back-and-white bucks, respectively. The condition was not found among bucks with brown-and-black, brown-and-white, and multiple coat colours. The right and left testes of normal bucks and the descended testes of cryptorchid bucks had comparable gross testicular measurements, but the retained cryptorchid testes were smaller in size. The estimates of the testicular measurements showed that testicular weights (with the entire epididymes), peripheral longitudinal lengths and mid-circumferences of the...
Tipo: Journal article Palavras-chave: Abdominal; Cryptorchidism; Goat; Hypoplasia; Morphometry; Nigeria; Sahel; Subcutaneous; Testis; Unilateral; Degeneration; Orchitis; Fibroplasia.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300027
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Unilateral Double Axillary and Double Brachial Arteries: Embryological Basis and Clinical Implications International Journal of Morphology
Jayakumari,S; Rath,Gayatri; Arora,Jyoti.
This report presents double axillary and double brachial arteries on the right side of an adult male cadaver. In this case, the right axillary artery bifurcated into axillary artery I and axillary artery II posterior to the pectoralis minor muscle. Both the axillary arteries with their branches traversed upto lower border of teres major muscle and continued further as seperate entities into the cubital fossa as brachial artery I and brachial artery II respectively. The axillary artery I which continued as brachial artery I was superficial and tortuous in its course, while the axillary artery II was slender and deeply situated. The thoraco-acromial, lateral thoracic and subscapular arteries took origin from axillary artery I. The superior thoracic artery...
Tipo: Journal article Palavras-chave: Axillary artery; Brachial artery; Anatomical variation.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000400027
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Unilateral Double Plantaris Muscle: A Rare Anatomical Variation International Journal of Morphology
Kwinter,David M; Lagrew,James P; Kretzer,Julie; Lawrence,Cara; Malik,Diksha; Mater,Megan; Brueckner,Jennifer K.
The occurrence of a unilateral second plantaris muscle was discovered during the anatomical dissection of a 47 year old female with Huntington Chorea Disease. The cadaver was found to possess bilateral plantaris muscles and a distinct anomalous muscle morphologically resembling a second plantaris on the medial right leg. The inner and outer bellies of the anomalous plantaris arose proximally from the medial condyle of the femur and formed a short tendon that fused distally with the tendon of the lateral plantaris muscle.
Tipo: Journal article Palavras-chave: Plantaris muscle; Anatomical variation.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400018
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Unilateral Pectoralis Minimus Muscle: A Case Report International Journal of Morphology
Rai,Rajalakshmi; Ranade,Anu V; Prabhu,Latha V; Prakash,; Rajanigandha,V; Nayak,Soubhagya R.
Presence of additional muscles in the pectoral region has often been reported. We report about the presence of Pectoralis Minimus muscle, in a male cadaver. It was present deep to the pectoralis major muscle and superomedial to the pectoralis minor muscle. The variant was closely related to the branches of thoracoacromial vessels where one of the branches was passing between the pectoralis minor muscle and the variant muscle. Hyperabduction of the arm may compress these vessels giving rise to certain vascular symptoms. Also these variations should be borne in mind during certain surgical procedures in the pectoral region.
Tipo: Journal article Palavras-chave: Muscle variation; Anatomy; Pectoral muscles.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000100004
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Unilateral Quadripartite Composition of Pectoral Major Muscle: Anatomical Description and Clinical Implications International Journal of Morphology
Dhuria,Ruchi; Mehta,Vandana; Loh,Hitendra; Arora,Jyoti; Roy,Sanchita; Suri,Rajesh; Rath,Gayatri.
A unilateral anomalous disposition of the muscular slips of pectoralis major was observed in an adult male cadaver during routine gross anatomy teaching session. The pectoralis major muscle displayed unusual configuration and comprised of four parts delineated by three intramuscular clefts. Further, the sternocostal part was found to divide into two fasciculi. The origin and insertion of pectoralis major muscle was as usual and unremarkable. Interestingly, the innervation of the muscle was observed to bear an important variation. The clavicular and sternocostal slips of pectoralis major muscle received a direct branch from the lateral cord of brachial plexus in addition to its usual innervation from the lateral and medial pectoral nerves. The multiplicity...
Tipo: Journal article Palavras-chave: Pectoralis major muscle; Muscle; Anomaly; Innervation.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400040
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Unilateral Renal Haemangiopericytoma: Report of a Rare Tumour International Journal of Morphology
Ribeiro,J. G. A.; Klojda,C. A. B.; Machado,F. A.; Favorito,L. A.; Cavalcante,A. G. L.; Babinski,M. A..
The pericytes are modified smooth muscle cells (SMCs) that surrounding capillaries and to change the diameter of vascular lumen. In this article we report a case of renal haemangiopericytoma. A 78-year-old woman was admitted with a complaint of abdominal pain. Ultrasonography revealed a solid injury in the third portion of the left kidney. Abdominal CT scan revealed a tumoral mass. Due the high index of suspicion of malignant neoplasia the patient was submitted to left radical nefrectomy. The histopathological evaluation confirmed haemangiopericytoma by immunohistochemistry. The patient fared well and was alive 5 years after radical nephrectomy
Tipo: Journal article Palavras-chave: Kidney; Tumour; Haemangiopericytoma; Pathology; Immunohistochemistry.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000300007
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Unilateral Third/Accessory Head of the Gastrocnemius Muscle: a Case Report International Journal of Morphology
Dave,Mitesh R; Yagain,Vaishali Kiran; Anadkat,Samir.
The superficial muscle group of the posterior compartment of leg forms a powerful muscular mass in the calf. The two-headed gastrocnemius is the most superficial muscle of this group, and forms the proximal, most prominent part of the calf. Gastrocnemius muscle exhibits numerous variations in the origin and/or insertion. The present report describes the incidental occurrence of the third/accessory head of gastrocnemius muscle in the left lower limb. During routine educational dissection of a 54-year old American female cadaver in the Anatomy lab of the Medical University of the Americas, Nevis, West Indies, we found an unusual 10.8 cm long muscle in the left popliteal region, attached proximally to the lateral aspect of the popliteal surface of femur, and...
Tipo: Journal article Palavras-chave: Third/Accessory head of gastrocnemius; Popliteal; Tensor fascia suralis; Plantaris; Soleus.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300048
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Unilateral Variation in the Origin of the Inferior Alveolar and Buccal Arteries: A Case Report International Journal of Morphology
Velasco,I; Soto,R; García,R; Sepúlveda,G.
The maxillary artery (MA) is one of the terminal branches of the external carotid artery (ECA) and is located in the infratemporal fossa (IF). Some of the branches in this region are the inferior alveolar artery (IAA) and the buccal artery (BA), both descending branches. Here, we report an unusual unilateral origin of the IAA and the BA from a common trunk directly from the ECA. We conducted a routine dissection of both IF in a 54-year-old hispanic male cadaver. Fixed with Universidad de los Andes® conservative solution and red latex for vascular filling. On each side, the MA is observed superficially located over the lateral pterygoid muscle. On the right side, the IAA and the BA originate from a common trunk from the ECA approximately 5 mm prior to the...
Tipo: Journal article Palavras-chave: Anatomical variations; Inferior alveolar artery; Buccal artery; Maxillary artery; Infratemporal fossa.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300044
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Unilateral Variations of Vessels and Nerves in the Neck International Journal of Morphology
Unver Dogan,Nadire; Cicekcibasi,Aynur Emine; Fazliogullari,Zeliha; Yilmaz,Mehmet Tugrul; Uysal,Ismihan Ilknur; Salbacak,Ahmet.
Variations of vessels and nerves in the left neck side, of 65 year old male cadaver, during the routine dissections, were detected. It was observed that the linguofacial trunk originated from external carotid artery and that the ascending pharyngeal artery originated from the occipital artery. It was determined that after the laryngeopharyngeales rami originated from the superior cervical ganglion, the branch wound around the origin of the superior thyroid artery. As an additional variation, the internal jugular vein divided. The cervical ansa and the inferior belly of the omohyoid muscle passed through the parts of the vein. We think that these type of variation can entail important difficulties during radiologic and surgical procedures of the neck...
Tipo: Journal article Palavras-chave: External carotid artery; Linguofacial trunk; Internal juguler vein; Anatomic variation.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300049
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Unusual Branches of Femoral Artery in the Femoral Triangle: A Case Report International Journal of Morphology
Nayak B,Satheesha; Mishra,Snigdha; George,Bincy M; Cherian,Saju Binu; Shetty,Surekha D.
Femoral artery is the major artery of the lower limb. It shows some variations in its branching pattern. One of the rare but clinically important variations is the origin of deep circumflex iliac and inferior epigastric arteries from it instead of from external iliac artery. We report here the origin of inferior epigastric and deep circumflex iliac arteries from the femoral artery bilaterally. Both the arteries passed up deep to the inguinal ligament and had a normal course and distribution after crossing the inguinal ligament. Knowledge of these variations is of importance in plastic surgery, anterior approach to the hip joint, draining psoas abscess or reducing a femoral hernia.
Tipo: Journal article Palavras-chave: Femoral artery; Deep circumflex iliac artery; Inferior epigastric artery; Femoral triangle; Anatomical variation.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300006
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Unusual Branching Pattern of External Iliac Artery: Case Report International Journal of Morphology
Ranganath,Vallabhajosyula; Gayathri,T.
During the routine dissection, a rare anomaly was observed in left lower limb of a female cadaver. The external iliac artery continued as femoral artery, branched on lateral side as the lateral circumflex femoral artery and on medial side as profunda femoris artery. On tracing the lateral circumflex femoral artery, the ascending branch towards the spinous anastomosis was very thin and coursed behind the rectus femoris muscle. The transverse and descending branches were not observed, however, the artery coursed along the vastus lateralis towards the knee. The femoral artery had its normal course and continued as popliteal artery. The profunda femoris artery originated from the medial side of the external iliac artery, initially superficial to the femoral...
Tipo: Journal article Palavras-chave: External iliac artery; Profunda femoris; Lateral circumflex femoral artery; Variations; Vascular anatomy.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300028
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