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Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology

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https://www.readbyqxmd.com/read/28214332/comparison-of-several-white-matter-tracts-in-feline-and-canine-brain-by-using-magnetic-resonance-diffusion-tensor-imaging
#1
Olivier Jacqmot, Bert Van Thielen, Alex Michotte, Inneke Willekens, Filip Verhelle, Peter Goossens, Filip De Ridder, Jan Pieter Clarys, Anne Vanbinst, Cindy Peleman, Johan de Mey
Recently, we published a first anatomical Diffusion Tensor Imaging (DTI) atlas regarding white matter tracts in the canine brain. The purpose of this study was to show the significance of DTI in the revelation of the white matter fibres in the feline brain (i.e. to obtain an anatomical DTI atlas of images) and to descriptively compare these to previously obtained white matter fibre images of the canine brain. DTI MR Images of 4 cats euthanised for reasons other than neurological disorders were obtained with a 3 T system...
February 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28214291/segmental-distribution-of-myosin-heavy-chain-isoforms-within-single-muscle-fibers
#2
Ming Zhang, Maree Gould
Despite many studies looking at the distribution of myosin heavy chain (MHC) isoforms across a transverse section of muscle, knowledge of MHC distribution along the longitudinal axis of a single skeletal muscle fiber has been relatively overlooked. Immunocytochemistry was performed on serial sections of rat extensor digitorum longus (EDL) muscle to identify MHC types I, IIA, IIX, IIY and IIB. Sixteen fascicles which contained a total of 362 fibers were randomly and systematically sampled from the 3 EDL muscles...
February 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28205407/collagen-fiber-orientation-in-primate-long-bones
#3
Johanna Warshaw, Timothy G Bromage, Carl J Terranova, Donald H Enlow
Studies of variation in orientation of collagen fibers within bone have lead to the proposition that these are preferentially aligned to accommodate different kinds of load, with tension best resisted by fibers aligned longitudinally relative to the load, and compression best resisted by transversely aligned fibers. However, previous studies have often neglected to consider the effect of developmental processes, including constraints on collagen fiber orientation (CFO), particularly in primary bone. Here we use circularly polarized light microscopy to examine patterns of CFO in cross-sections from the midshaft femur, humerus, tibia, radius and ulna in a range of living primate taxa with varied body sizes, phylogenetic relationships and positional behaviors...
February 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28196403/morphologic-patterns-formed-by-the-anomalous-fibers-occurring-along-the-anterior-capsule-of-the-crystalline-lens-in-people-with-the-long-anterior-zonule-trait
#4
Daniel K Roberts, Yongyi Yang, Christina E Morettin, Tricia L Newman, Mary F Roberts, Jacob T Wilensky
People with the long anterior zonule (LAZ) trait, which may have prevalence near 2%, have zonular fibers that extend more central than usual along the anterior capsule of the crystalline lens. The anomalous fibers can be observed in vivo with clinical slit lamp biomicroscopy after pharmacologic pupil dilation, and although minimally studied, the LAZ trait may have importance to glaucoma, retinal degeneration, and cataract surgery. In order to further characterize LAZ morphology, a custom computer program was used to trace LAZ fibers seen on retro-illumination photos acquired during previous study at an academic, urban eye care facility in Chicago, IL, USA...
February 14, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28192873/overview-of-human-salivary-glands-highlights-of-morphology-and-developing-processes
#5
REVIEW
Fernanda de Paula, Tathyane Harumi Nakajima Teshima, Ricardo Hsieh, Milena Monteiro Souza, Marcello Menta Simonsen Nico, Silvia Vanessa Lourenco
Salivary glands are essential organs that produce and secrete saliva to the oral cavity. During gland morphogenesis, many developmental processes involve a series of coordinated movements and reciprocal interactions between the epithelium and mesenchyme that generate the ductal system and the secretory units. Recent studies have shown new findings about salivary gland development, particularly regarding lumen formation and expansion, with the involvement of apoptosis and cell polarization, respectively. Moreover, it has been observed that human minor salivary glands start forming earlier than previously published and that distinct apoptotic mediators can trigger duct lumen opening in humans...
February 13, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28187501/anatomical-study-of-the-brachial-plexus-in-the-common-marmoset-callithrix-jacchus
#6
Kenji Emura, Takamitsu Arakawa, Toshio Terashima
To elucidate the forelimb phylogeny of primates, anatomical analysis of the brachial plexus in platyrrhines is beneficial. In the present study, six brachial plexuses and the surrounding arteries of four common marmosets were dissected. In five specimens, the brachial plexus consisted of five ventral rami from the fifth cervical nerve (C5) to the first thoracic nerve (T1). In one specimen, the ventral ramus of the fourth cervical nerve joined with the brachial plexus. In five specimens, the upper trunk was composed of C5 and the sixth cervical nerve (C6)...
February 10, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28187500/basement-membrane-type-iv-collagen-and-laminin-an-overview-of-their-biology-and-value-as-fibrosis-biomarkers-of-liver-disease
#7
REVIEW
Ki M Mak, Rena Mei
Basement membranes provide structural support to epithelium, endothelium, muscles, fat cells, Schwann cells and axons. Basement membranes are multifunctional: they modulate cellular behavior, regulate organogenesis, promote tissue repair, form a barrier to filtration and tumor metastasis, bind growth factors and mediate angiogenesis. All basement membranes contain type IV collagen (Col IV), laminin, nidogen, and perlecan. Col IV and laminin self-assemble into two independent supramolecular networks that are linked to nidogen and perlecan to form a morphological discernable basement membrane/basal lamina...
February 10, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28181413/morphometry-and-variability-of-the-brain-arterial-circle-in-chinchilla-chinchilla-laniger-molina
#8
Jacek Kuchinka
Arterial circles of brains from 70 adult chinchillas were filled with synthetic latex. The arterial circle of the brain is formed as the result of vertebral arteries being merged into the basilar artery. Caudally, both vertebral arteries gave rise to the ventral spinal artery. The ventral spinal artery splits into tiny cerebellar vessels, the pontine and cochlear branches. Distally, the basilar artery ramified into two terminal branches that formed the arterial circle of brain, rostrally open in most cases (75%)...
February 9, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28176490/diversity-and-determinants-of-the-three-dimensional-anatomical-axis-of-the-heart-as-revealed-using-multidetector-row-computed-tomography
#9
Shumpei Mori, Robert H Anderson, Natsuko Tahara, Yu Izawa, Takayoshi Toba, Sei Fujiwara, Shinsuke Shimoyama, Yoshiaki Watanabe, Tatsuya Nishii, Atsushi K Kono, Ken-Ichi Hirata
The location of the heart within the thorax varies significantly between individuals. The resultant diversity of the anatomical cardiac long axis, however, and its determinants, have yet to be systematically investigated. We enrolled 100 consecutive patients undergoing coronary arterial computed tomographic angiography, decomposing the vector of the anatomical cardiac long axis by projecting it to horizontal, frontal, and sagittal planes. The projected vectors on each plane were then converted into three rotation angles using coordinate transformation...
February 8, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28176462/hormonal-treatment-ffects-on-the-cross-sectional-area-of-pubococcygeus-muscle-fibers-after-denervation-and-castration-in-male-rats
#10
Miguel Lara-García, Mayvi Alvarado, Estela Cuevas, Omar Lara-Garcia, Dale R Sengelaub, Pablo Pacheco
We explore the interaction of muscle innervation and gonadal hormone action in the pubococcygeus muscle (Pcm) after castration and hormone replacement. Male Wistar rats were castrated and the Pcm was unilaterally denervated; after 2 or 6 weeks, the cross-sectional area (CSA) of Pcm fibers was assessed. Additional groups of castrated rats were used to examine the effects of hormone replacement. At 2 weeks post surgeries, rats were implanted with Silastic capsules containing either dihydrotestosterone (DHT), estradiol benzoate (EB) or both hormones, and the CSA of Pcm fibers was assessed after 4 weeks of hormone treatment...
February 8, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28176461/high-resolution-localization-of-rab5-eea1-and-nectin-3-to-tubulobulbar-complexes-in-the-rat-testis
#11
Arlo Adams, A Wayne Vogl
Tubulobulbar complexes are clathrin/actin-based structures that internalize intercellular junctions in the testis. They resemble coated pits with extremely long necks that are cuffed by dendritic actin networks. As the structures mature, a swollen region or bulb develops near the end of each complex. The bulbs lack actin cuffs and are closely associated with cisternae of endoplasmic reticulum. The bulbs expand and are internalized and enter endocytic compartments of the Sertoli cell. Previous immunofluorescence studies have demonstrated that markers for early endosomes (Rab5 and EEA1) are associated with tubulobulbar complexes and are localized at or near the ends of the structures...
February 8, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27998013/neuroprotective-and-ameliorating-impacts-of-omega-3-against-aspartame-induced-neuronal-and-astrocytic-degeneration
#12
Eyad M T Ali, Hany M A Sonpol
Aspartame (ASP) is one of the commonest artificial sweetener used all over the world and considered as an extremely risky compound and raises a lot of controversy. Therefore, this study was designed to investigate cellular damage of the anterior horn cells in the spinal cord of albino male rats and the possibility of hindering these changes by using omega-3 (OM3).Thirty seven adult male albino rats were divided into three groups: Control, ASP-treated and ASP+OM3-treated groups. Spinal cord sections were prepared and stained with Hx&E, caspase-3 and GFAP immunostaining...
December 20, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27997081/uterine-focal-adhesion-dynamics-during-pregnancy-in-a-marsupial-sminthopsis-crassicaudata-dasyuridae
#13
Melanie K Laird, Michaela Turancova, Bronwyn M McAllan, Christopher R Murphy, Michael B Thompson
Alterations to the basal attachment points between the epithelium of the uterus and the underlying tissue in early pregnancy affect how easily the epithelium can be invaded by the implanting embryo. Attachment points- focal adhesions- disassemble to facilitate highly invasive implantation in rats, but species with less invasive implantation, including marsupials, may require different basal alterations for successful pregnancy. Here we used immunofluorescence microscopy and Western blotting to conduct the first study of basal plasma membrane dynamics in the uterus during marsupial pregnancy...
December 20, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27997077/bone-microstructure-of-pareiasaurs-parareptilia-from-the-karoo-basin-south-africa-implications-for-growth-strategies-and-lifestyle-habits
#14
Aurore Canoville, Anusuya Chinsamy
Numerous morphological studies have been carried out on pareiasaurs; yet their taxonomy and biology remain incompletely understood. Earlier works have suggested that these herbivorous parareptiles had a short juvenile period as compared to the duration of adulthood. Several studies further suggested an (semi-) aquatic lifestyle for these animals, but more recent investigations have proposed a rather terrestrial habitat. Bone paleohistology is regarded as a powerful tool to assess aspects of tetrapod paleobiology, but few studies have been conducted on pareiasaurs...
December 20, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27997075/vascular-canals-in-permanent-hyaline-cartilage-development-corrosion-of-nonmineralized-cartilage-matrix-and-removal-of-matrix-degradation-products
#15
Simone Gabner, Gabriele Häusler, Peter Böck
Core areas in voluminous pieces of permanent cartilage are metabolically supplied via vascular canals (VCs). We studied cartilage corrosion and removal of matrix degradation products during the development of VCs in nose and rib cartilage of piglets. Conventional staining methods were used for glycosaminoglycans, immunohistochemistry was performed to demonstrate collagens types I and II, laminin, Ki-67, von Willebrand factor, VEGF, macrophage marker MAC387, S-100 protein, MMPs -2,-9,-13,-14, and their inhibitors TIMP1 and TIMP2...
December 20, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27997073/effects-of-growth-on-muscle-tendon-and-aponeurosis-tissues-in-rabbit-shank-musculature
#16
Markus Böl, Kay Leichsenring, Tobias Siebert
There exist several studies using morphological analyses of skeletal muscles to obtain a better understanding of muscle structure. The structural information obtained are primarily determined from single muscle components using individual animals of discrete ages. Further, little is known about changing dimensions of the aponeurosis, which is an important load-transferring interface in muscle mechanics. Thus, the aim of the present study was to determine how the muscle, tendon, and particularly the aponeurosis geometry of the rabbit shank musculature (M...
December 20, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27981811/canine-transmissible-venereal-tumor-is-its-biological-behavior-changing
#17
LETTER
A P Duzanski, H B Fêo, L M Montoya, C V Seullner, N S Rocha
No abstract text is available yet for this article.
December 16, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27981802/a-novel-method-for-constructing-histological-section-datasets-of-the-basal-ganglia-in-digitized-human-brain
#18
Xie Luoyingzi, Rong Jingjing, Li Qiyu
OBJECTIVE: To investigate the construction of the histological section datasets in the basal ganglia of digitized human brain to provide a reference for the meso-level histological data acquisition. METHODS: a fresh adult brain from a cadaver with no neurological disease was selected, and tissue blocks of the basal ganglia in the right hemisphere was extracted using the visualization method, followed by pretreatments including gradient dehydrating, gelatin-embedding and setting of calibration points...
December 16, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27981799/expression-of-epithelial-and-mesenchymal-differentiation-markers-in-the-early-human-gonadal-development
#19
Vlatka Martinovic, Tanja Vukusic Pusic, Ivana Restovic, Ivana Bocina, Natalija Filipovic, Mirna Saraga-Babic, Katarina Vukojevic
Expressions of cytokeratin 8 (CK8), vimentin, nestin and alpha-smooth-muscle-actin (alpha-SMA) were analyzed in the developing gonads of 12, 5-9 week old (W) human conceptuses by immunohistochemistry and immunofluorescence. During the investigated period, the number of CK8 positive cells increased from 56% to 92% in the gonadal surface epithelium, from 50% to 60% in the stroma, and from 23% to 42% in the medulla. In the early fetal period, the cell expression of CK8 increased in all gonadal parts, whereas primordial germ cells (PGC) remained negative...
December 16, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27981794/reproductive-tract-histology-in-south-american-fur-seal-pups-arctophoca-australis
#20
Helena Katz, Olle Johansson
In the present study, a detailed histological description of the female reproductive tract of South American fur seal (Arctophoca australis) pups has been conducted. The uterine tube was covered by cuboidal to columnar epithelium; nerve fibers were present in the mesosalpinx and beneath the muscular layer. The uterus was bipartitus; the endometrial surface of the horns was lined by a simple cuboidal or columnar epithelium with deep tubular glands; caudally ("the transition area"), the epithelium changed to pseudostratified columnar, few tubular glands were present and the myometrium increased in width...
December 16, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
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