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Cartilaginous morphology

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https://www.readbyqxmd.com/read/29032864/dietary-variation-and-mechanical-properties-of-articular-cartilage-in-the-temporomandibular-joint-implications-for-the-role-of-plasticity-in-mechanobiology-and-pathobiology
#1
Matthew J Ravosa, Robert J Kane
Due to their nature as tissue composites, skeletal joints pose an additional challenge in terms of evaluating the functional significance of morphological variation in their bony and cartilaginous components in response to altered loading conditions. Arguably, this complexity requires more direct means of investigating joint plasticity and performance than typically employed to analyze macro- and micro-anatomical phenomena. To address a significant gap in our understanding of the plasticity of the mammalian temporomandibular joint (TMJ), we investigated the histology and mechanical properties of condylar articular cartilage in rabbits subjected to long-term variation in diet-induced masticatory stresses, specifically cyclical loading...
August 25, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/29032129/linear-measurements-of-vocal-folds-and-laryngeal-dimensions-in-freshly-excised-human-larynges
#2
Mohamed K Mobashir, Abd El Raof S Mohamed, Amal S Quriba, Ahmad M Anany, Elham M Hassan
INTRODUCTION: Understanding the morphology of the larynx, one of the most complex organs of the human body, is an important step toward understanding the detailed laryngeal anatomy, and physiology. Different studies have described the linear measurements of the larynx in different measuring methods, but no studies have been structured to describe vocal fold length in freshly excised larynges. OBJECTIVES: The aim of this study was to describe exact anatomical measurements of vocal folds and some laryngeal structures in freshly excised larynges, and to compare such measurements between males and females...
October 11, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28990202/beneath-the-hairy-look-the-hidden-reproductive-diversity-of-the-gibsmithia-hawaiiensis-complex-dumontiaceae-rhodophyta
#3
Daniela Gabriel, Stefano G A Draisma, William E Schmidt, Tom Schils, Thomas Sauvage, Clio Maridakis, C Frederico D Gurgel, D James Harris, Suzanne Fredericq
The tropical alga previously recognized as Gibsmithia hawaiiensis (Dumontiaceae, Rhodophyta) was recently suggested to represent a complex of species distributed throughout the Indo-Pacific Ocean and characterized by a peculiar combination of hairy (pilose) gelatinous lobes growing on cartilaginous stalks. Phylogenetic reconstructions based on three genetic markers are presented here with the inclusion of new samples. Further diversity is reported within the complex, with nine lineages spread in four major phylogenetic groups...
October 9, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28989770/large-batoid-fishes-frequently-consume-stingrays-despite-skeletal-damage
#4
Mason N Dean, Joseph J Bizzarro, Brett Clark, Charlie J Underwood, Zerina Johanson
The shapes of vertebrate teeth are often used as hallmarks of diet. Here, however, we demonstrate evidence of frequent piscivory by cartilaginous fishes with pebble-like teeth that are typically associated with durophagy, the eating of hard-shelled prey. High-resolution micro-computed tomography observation of a jaw specimen from one batoid species and visual investigation of those of two additional species reveal large numbers of embedded stingray spines, arguing that stingray predation of a scale rivalling that of the largest carnivorous sharks may not be uncommon for large, predatory batoids with rounded, non-cutting dentition...
September 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28980547/-the-age-specific-changes-in-the-histological-structure-of-the-thyroid-cartilage-in-the-men
#5
Yu I Pigolkin, M P Poletaeva, G V Zolotenkova, A V Volkov
The objective of the present study was to elucidate the morphological and morphometric characteristics of the human thyroid cartilage during different periods of life. The thyroid cartilages were harvested from 70 cadavers of the subjects of the masculine gender who had died at the age from 1 to 93 years from the non-violent causes and had neither injuries nor signs of pathological changes in the neck organs. The microscopic studies were carried out using the standard methods for the staining of the preparations with hematoxylin and eosin...
2017: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/28960402/sequence-and-timing-of-early-cranial-skeletal-development-in-xenopus-laevis
#6
Paul Lukas, Lennart Olsson
Xenopus laevis is widely used as a model organism in biological research. Morphological descriptions of the larval cartilaginous skeleton are more than half a century old and comprehensive studies of early cartilage differentiation and development are missing. A proper understanding of early cranial skeletal development in X. laevis requires a detailed description that can function as a baseline for experimental studies. This basis makes it possible to evaluate skeletal defects produced by experiments on gene interactions, such as gain- or loss-of function experiments...
September 28, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28935583/role-of-elasmobranchs-and-holocephalans-in-understanding-peptide-evolution-in-the-vertebrates-lessons-learned-from-gonadotropin-releasing-hormone-gnrh-and-corticotropin-releasing-factor-crf-phylogenies
#7
REVIEW
David A Lovejoy, Ola M Michalec, David W Hogg, David I Wosnick
The cartilaginous fishes (Class Chondrichthyes) comprise two morphologically distinct subclasses; Elasmobranchii and Holocephali. Evidence indicates early divergence of these subclasses, suggesting monophyly of their lineage. However, such a phylogenetic understanding is not yet developed within two highly conserved peptide lineages, GnRH and CRF. Various GnRH forms exist across the Chondrichthyes. Although 4-7 immunoreactive forms have been described in Elasmobranchii, only one has been elucidated in Holocephali...
September 18, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28923317/calcified-cartilage-or-bone-collagens-in-the-tessellated-endoskeletons-of-cartilaginous-fish-sharks-and-rays
#8
Ronald Seidel, Michael Blumer, Elisabeth-Judith Pechriggl, Kady Lyons, Brian K Hall, Peter Fratzl, James C Weaver, Mason N Dean
The primary skeletal tissue in elasmobranchs -sharks, rays and relatives- is cartilage, forming both embryonic and adult endoskeletons. Only the skeletal surface calcifies, exhibiting mineralized tiles (tesserae) sandwiched between a cartilage core and overlying fibrous perichondrium. These two tissues are based on different collagens (Coll II and I, respectively), fueling a long-standing debate as to whether tesserae are more like bone (Coll 1-based) or calcified cartilage in their matrix composition. We demonstrate that stingray (Urobatis halleri) tesserae are bipartite, having an upper Coll I-based "cap" that merges into a lower Coll II-based "body" zone, although tesserae are surrounded by cartilage...
September 15, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28906125/imaging-of-rare-appendicular-non-acral-soft-tissue-chondromas-in-adults-with-histopathologic-correlation
#9
Mohamed Ragab Nouh, Hanan Abd El-Aziz Amr, Rola H Ali
Background Soft-tissue chondroma (STC) is a rare benign soft tissue tumor that arises primarily in acral extra-skeletal locations. Occasionally, STCs may arise in more proximal non-acral locations, accompanied by non-classic features that label them as indeterminate lesions and pose diagnostic challenge for both radiologists and pathologists alike. Purpose To explicate the potential of diagnostic imaging in the identification and characterization of appendicular non-acral STCs with emphasis on their morphologic magnetic resonance imaging (MRI) enhancement...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28892654/single-stage-cartilage-repair-using-platelet-rich-fibrin-scaffolds-with-autologous-cartilaginous-grafts
#10
Chin-Chean Wong, Chih-Hwa Chen, Wing P Chan, Li-Hsuan Chiu, Wei-Pin Ho, Fon-Jou Hsieh, You-Tzung Chen, Tsung-Lin Yang
BACKGROUND: To avoid complicated procedures requiring in vitro chondrocyte expansion for cartilage repair, the development of a culture-free, 1-stage approach combining platelet-rich fibrin (PRF) and autologous cartilage grafts may be the solution. PURPOSE: To develop a feasible 1-step procedure to combine PRF and autologous cartilage grafts for articular chondral defects. STUDY DESIGN: Controlled laboratory study Methods: The chemotactic effects of PRF on chondrocytes harvested from the primary culture of rabbit cartilage were evaluated in vitro and ex vivo...
September 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28828057/dysplasia-epiphysealis-hemimelica-a-histological-comparative-study-with-osteochondromas
#11
J Stevens, T J M Welting, A M Witlox, L W van Rhijn, H M Staal
PURPOSE: Dysplasia epiphysealis hemimelica (DEH) is a rare developmental disorder resulting in epiphyseal overgrowth. Based on histological appearance, it is often described as an osteochondroma or osteochondroma-like lesion, although clinical differences exist between DEH and osteochondromas. The aim of this study was to test whether DEH and osteochondromas are histologically identical diseases. METHODS: Tissue samples of two age- and gender-matched cases with DEH and hereditary multiple exostoses were histologically compared...
June 1, 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28812679/meckel-s-cartilage-breakdown-offers-clues-to-mammalian-middle-ear-evolution
#12
Neal Anthwal, Daniel J Urban, Zhe-Xi Luo, Karen E Sears, Abigail S Tucker
A key transformation in mammalian ear evolution was incorporation of the primary jaw joint of premammalian synapsids into the definitive mammalian middle ear of living mammals. This evolutionary transition occurred in two steps, starting with a partial or 'transitional' mammalian middle ear in which the ectotympanic and malleus were still connected to the mandible by an ossified Meckel's cartilage (MC), as observed in many Mesozoic mammals. This was followed by MC breakdown, freeing the ectotympanic and the malleus from the mandible and creating the definitive mammalian middle ear...
March 6, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812406/types-of-orbital-osteoma-a-descriptive-analysis
#13
Tayyab Afghani, Hassan Mansoor
AIMS: This study describes different types of orbital osteoma based on clinical per-operative morphology and radiological findings to facilitate communication between ophthalmologists and surgical management for a better patient outcome. MATERIALS AND METHODS: The study was conducted in the Orbit and Oculoplastics Department of Al-Shifa Trust Eye Hospital, Rawalpindi, Pakistan, from July 1, 2001 to June 30, 2014. A retrospective analysis of 520 diagnosed orbital tumours who presented to us was carried out and the prevalence of orbital osteoma was determined...
August 16, 2017: Orbit
https://www.readbyqxmd.com/read/28802681/activated-fgfr3-promotes-bone-formation-via-accelerating-endochondral-ossification-in-mouse-model-of-distraction-osteogenesis
#14
Yusuke Osawa, Masaki Matsushita, Sachi Hasegawa, Ryusaku Esaki, Masahito Fujio, Bisei Ohkawara, Naoki Ishiguro, Kinji Ohno, Hiroshi Kitoh
Achondroplasia (ACH) is one of the most common short-limbed skeletal dysplasias caused by gain-of-function mutations in the fibroblast growth factor receptors 3 (FGFR3) gene. Distraction osteogenesis (DO) is a treatment option for short stature in ACH in some countries. Although the patients with ACH usually show faster healing in DO, details of the newly formed bone have not been examined. We have developed a mouse model of DO and analyzed new bone regenerates of the transgenic mice with ACH (Fgfr3(ach) mice) histologically and morphologically...
August 10, 2017: Bone
https://www.readbyqxmd.com/read/28796694/myoepithelioma-of-soft-tissue-with-both-squamous-and-adipocytic-metaplasia
#15
Ashley Elsensohn, Joshua H Mo, Tyler J Maly, Patrick K Lee, Sebastien de Feraudy
Soft tissue, or cutaneous, myoepitheliomas are rare tumors arising solely from a myoepithelial origin. These neoplasms are typically associated with uncertain differentiation and can contain cellular morphologies that include spindle, plasmacytoid, epithelioid, or clear cell forms. Soft tissue myoepitheliomas are commonly found on the lower limbs and in the pelvic girdle but can occur throughout the body. A small minority display heterogenous differentiation, typically osseous or cartilaginous in nature. Squamous and adipocytic cell types are much rarer...
August 3, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28792510/morphological-and-taxonomic-descriptions-of-a-new-genus-and-species-of-killifishes-teleostei-cyprinodontiformes-from-the-high-andes-of-northern-chile
#16
Gloria Arratia, Irma Vila, Natalia Lam, Claudia Jimena Guerrero, Claudio Quezada-Romegialli
A new genus and species, Pseudorestias lirimensis, is described from the southern part of the Chilean Altiplano. While sharing several characters that clearly align the new species with Orestias, this new fish is characterized by numerous autapomorphies: the Meckel cartilage is a continuous cartilage that broadly expands posteriorly (in large specimens, it keeps its anterior part and is resorbed posteriorly), the basibranchials are fused into one long element, the second pharyngobranchial is not displaced dorsally over pharyngobranchial tooth plate 3+4, but they are aligned, the anterior and posterior ceratohyals are closely articulated keeping a scarce amount of cartilage between both bones and ventral to them, ossified middle and distal dorsal radials are present in females as well as ossified middle and distal anal radials...
2017: PloS One
https://www.readbyqxmd.com/read/28783120/platelet-rich-fibrin-facilitates-rabbit-meniscal-repair-by-promoting-meniscocytes-proliferation-migration-and-extracellular-matrix-synthesis
#17
Chin-Chean Wong, Tzong-Fu Kuo, Tsung-Lin Yang, Yang-Hwei Tsuang, Ming-Fang Lin, Chung-Hsun Chang, Yun-Ho Lin, Wing P Chan
Although platelet-rich fibrin (PRF) has been used in clinical practice for some time, to date, few studies reveal its role as a bioactive scaffold in facilitating meniscal repair. Here, the positive anabolic effects of PRF on meniscocytes harvested from the primary culture of a rabbit meniscus were revealed. The rabbit meniscocytes were cultured with different concentrations of PRF-conditioned medium, and were evaluated for their ability to stimulate cell migration, proliferation, and extracellular matrix formation...
August 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28770681/laterality-is-universal-among-fishes-but-increasingly-cryptic-among-derived-groups
#18
Michio Hori, Mifuyu Nakajima, Hiroki Hata, Masaki Yasugi, Satoshi Takahashi, Masanori Nakae, Kosaku Yamaoka, Masanori Kohda, Jyun-Ichi Kitamura, Masayoshi Maehata, Hirokazu Tanaka, Norihiro Okada, Yuichi Takeuchi
Laterality has been studied in several vertebrates, mainly in terms of brain lateralization and behavioral laterality, but morphological asymmetry has not been extensively investigated. Asymmetry in fishes was first described in scale-eating cichlids from Lake Tanganyika, in the form of bilateral dimorphism in which some individuals, when opening their mouths, twist them to the right and others to the left. This asymmetry has a genetic basis, and is correlated with lateralized attack behaviors. This has subsequently been found in fishes from numerous taxa with various feeding habits...
August 2017: Zoological Science
https://www.readbyqxmd.com/read/28687415/age-related-changes-in-the-morphological-relationship-between-the-supratubal-recess-and-the-eustachian-tube
#19
Juan Hong, Keguang Chen, Huiying Lyu, Dongming Yin, Lin Yang, Tianyu Zhang, Peidong Dai
OBJECTIVE: To study age-related changes in the morphology of the supratubal recess (STR) and its relationship with the Eustachian tube (ET). METHODS: Seventy randomly selected computed tomography (CT) images of non-pathological temporal bones of 49 patients were reviewed retrospectively. The patients were grouped according to age into 4 age groups: group A (0-3 years), group B (4-8 years), group C (9-18 years) and group D (19-50 years). Space analytic geometry was assessed to directly calculate the morphology of the STR and the ET...
July 4, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28667704/growth-and-development-at-the-sphenoethmoidal-junction-in-perinatal-primates
#20
Timothy D Smith, Matthew J McMahon, Michelle E Millen, Catherine Llera, Serena M Engel, Ly Li, Kunwar P Bhatnagar, Anne M Burrows, Michael P Zumpano, Valerie B DeLeon
Integration of the sphenoid and ethmoid bones during early postnatal development is poorly described in the literature. A uniquely prolonged patency of sphenoethmoidal synchondrosis or prespheno-septal synchondrosis (PSept) has been attributed to humans. However, the sphenoethmoidal junction has not been studied using a comparative primate sample. Here, we examined development of the sphenoethmoidal interface using ontogenetic samples of Old and New World monkeys, strepsirrhine primates (lemurs and lorises), and a comparative sample of other mammals...
July 1, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
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