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Osteology

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https://www.readbyqxmd.com/read/28417147/cortical-histomorphometry-of-the-human-humerus-during-ontogeny
#1
Rosie Pitfield, Justyna J Miszkiewicz, Patrick Mahoney
Modeling and remodeling are two key determinants of human skeletal growth though little is known about the histomorphometry of cortical bone during ontogeny. In this study, we examined the density and geometric properties of primary and secondary osteons (osteon area and diameter, vascular canal area and diameter) in subperiosteal cortical bone from the human humerus (n = 84) between birth and age 18 years. Sections were removed from the anterior midshaft aspect of humeri from skeletons. Age-at-death was reconstructed using standard osteological techniques...
April 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28408764/fossil-climbing-perch-and-associated-plant-megafossils-indicate-a-warm-and-wet-central-tibet-during-the-late-oligocene
#2
Feixiang Wu, Desui Miao, Mee-Mann Chang, Gongle Shi, Ning Wang
Understanding the Tibetan Plateau's palaeogeography and palaeoenvironment is critical for reconstructing Asia's climatic history; however, aspects of the plateau's uplift history remain unclear. Here, we report a fossil biota that sheds new light on these issues. It comprises a fossil climbing perch (Anabantidae) and a diverse subtropical fossil flora from the Chattian (late Oligocene) of central Tibet. The fish, Eoanabas thibetana gen. et sp. nov., is inferred to be closely related to extant climbing perches from tropical lowlands in south Asia and sub-Saharan Africa...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28404241/discrete-morphological-variants-of-human-cervical-vertebrae-exploring-pattern-of-distribution-and-biological-significance
#3
M K Karapetian
Studies on discrete traits of the human cervical vertebrae, appearing at certain intervals during the last century, posed some questions regarding evolutionary processes that human cervical spine underwent during phylogenesis. To address questions of significance of these morphological traits we need first a good knowledge of the extent of their variation in modern humans. The aim of the current work was to integrate available data on the occurrence of various non-metric traits in the human cervical spine and search for the pattern of their distribution on intra- and inter-population levels...
March 9, 2017: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/28386125/guangxi-cobra-venom-derived-ngf-promotes-the-osteogenic-and-therapeutic-effects-of-porous-bcp-ceramic
#4
Pan Jin, Fuqiang Yin, Li Huang, Li Zheng, Jinmin Zhao, Xingdong Zhang
Neuro-osteological interactions have an important role in the regulation of bone metabolism and regeneration. Neuropeptides combined with porous biphasic calcium phosphates (BCP) using protein adsorption may contribute to the acceleration of bone formation. In the present study, we investigated the effect of BCP combined with nerve growth factor (NGF) on the growth of osteoblasts in vitro and the combinational therapeutic effect on the repair of calvarial defects in vivo. NGF was separated and purified from Chinese cobra venom using a simplified three-step chromatography method...
April 7, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28385930/decreased-and-increased-relative-acetabular-volume-predict-the-development-of-osteoarthritis-of-the-hip-an-osteological-review-of-1090-hips
#5
D S Weinberg, D F K Williamson, M B Millis, R W Liu
AIMS: Recently, there has been considerable interest in quantifying the associations between bony abnormalities around and in the hip joint and osteoarthritis (OA). Our aim was to investigate the relationships between acetabular undercoverage, acetabular overcoverage, and femoroacetabular impingement (FAI) with OA of the hip, which currently remain controversial. MATERIALS AND METHODS: A total of 545 cadaveric skeletons (1090 hips) from the Hamann-Todd osteological collection were obtained...
April 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28384890/effectiveness-of-video-demonstration-over-conventional-methods-in-teaching-osteology-in-anatomy
#6
Angela A Viswasom, Abraham Jobby
INTRODUCTION: Technology and its applications are the most happening things in the world. So, is it in the field of medical education. This study was an evaluation of whether the conventional methods can compete with the test of technology. AIM: A comparative study of traditional method of teaching osteology in human anatomy with an innovative visual aided method. MATERIALS AND METHODS: The study was conducted on 94 students admitted to MBBS 2014 to 2015 batch of Travancore Medical College...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28384240/supplementary-cranial-description-of-the-types-of-edmontosaurus-regalis-ornithischia-hadrosauridae-with-comments-on-the-phylogenetics-and-biogeography-of-hadrosaurinae
#7
Hai Xing, Jordan C Mallon, Margaret L Currie
The cranial anatomy of the flat-skulled hadrosaurine Edmontosaurus regalis (Ornithischia: Hadrosauridae) is extensively described here, based on the holotype and paratype collected from the middle part of the Horseshoe Canyon Formation in southern Alberta. Focus is given to previously undocumented features of ontogenetic and phylogenetic importance. This description facilitates overall osteological comparisons between E. regalis and other hadrosaurids (especially E. annectens), and revises the diagnosis of E...
2017: PloS One
https://www.readbyqxmd.com/read/28381624/eye-development-in-the-four-eyed-fish-anableps-anableps-cranial-and-retinal-adaptations-to-simultaneous-aerial-and-aquatic-vision
#8
Louise N Perez, Jamily Lorena, Carinne M Costa, Maysa S Araujo, Gabriela N Frota-Lima, Gabriel E Matos-Rodrigues, Rodrigo A P Martins, George M T Mattox, Patricia N Schneider
The unique eyes of the four-eyed fish Anableps anableps have long intrigued biologists. Key features associated with the bulging eye of Anableps include the expanded frontal bone and the duplicated pupils and cornea. Furthermore, the Anableps retina expresses different photoreceptor genes in dorsal and ventral regions, potentially associated with distinct aerial and aquatic stimuli. To gain insight into the developmental basis of the Anableps unique eye, we examined neurocranium and eye ontogeny, as well as photoreceptor gene expression during larval stages...
April 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28373598/raccoon-dog-model-shows-preservation-of-bone-during-prolonged-catabolism-and-reduced-physical-activity
#9
Anne-Mari J Mustonen, Mikko A J Finnilä, Katri S Puukka, Timo J Jämsä, Simo Saarakkala, Juha K Tuukkanen, T Petteri Nieminen
The raccoon dog (Nyctereutes procyonoides) is a promising animal model capable of preventing disuse-induced osteoporosis. Previous data suggest that this species resembles bears in the preservation of bone mass and biomechanical properties during prolonged passivity and catabolism. This longitudinal study examined the osteological properties of tibiae in farm-bred raccoon dogs that were either fed or fasted (n=6/group) for a 10-week period. Peripheral quantitative computed tomography was utilized and plasma markers of bone turnover measured before fasting and at 9 weeks followed by mechanical testing (three-point bending), micro-computed tomography and Fourier transform infrared imaging at 10 weeks...
April 3, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28353306/anatomical-variations-of-the-sternal-angle-and-anomalies-of-adult-human-sterna-from-the-galloway-osteological-collection-at-makerere-university-anatomy-department
#10
Gonzaga Gonza Kirum, Ian Munabi, John Kukiriza, Gerald Tumusiime, Mesach Kange, Charles Ibingira, William Buwembo
BACKGROUND: Anatomical variations of the sternal angle and anomalies of the sternum are unique happenings of major clinical significance.It is known that misplaced sternal angles may lead to inaccurate counting of ribs and create challenges with intercostal nerve blocks and needle thoracostomies. Sternal foramina may pose a great hazard during sternal puncture, due to inadvertent cardiac or great vessel injury. These sternal variations and anomalies are rarely reported among Africans...
March 29, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28343025/recording-skeletal-completeness-a-standardised-approach
#11
Samantha K Rowbotham, Soren Blau, Jacqueline Hislop-Jambrich
Recording the preservation of human skeletal remains is the foundation of osteological analyses for forensic and archaeological skeletal material. Methods for recording the skeletal completeness, one of the components of skeletal preservation documentation, are however currently non-standardised and subjective. To provide practitioners with a scientific means to accurately quantify skeletal completeness in an adult skeleton, percentage values for each skeletal element have been established. Using computed tomography (CT) volume rendering applications and post-mortem CT skeletal data for one adult individual, the percentage value for each bone relative to the complete skeleton was calculated based on volume...
March 8, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28319276/comparisons-of-statistical-techniques-to-assess-age-related-skeletal-markers-in-bioarchaeology
#12
Colleen M Cheverko, Mark Hubbe
OBJECTIVES: Many authors argue that inconsistencies between studies of skeletal markers are based on different data collection protocols, especially when comparing age-related markers such as osteoarthritis. Less attention is given to the choice of statistical techniques that are used to test the hypotheses associated with the data. This paper addresses how different statistical techniques compare the prevalence of age-related skeletal indicators, specifically osteoarthritis. MATERIALS AND METHODS: Osteoarthritis prevalence was scored in eight postcranial joints in 243 adult individuals from seven prehistoric archaeological sites in Central California, and data was compared between three time periods [Early (4800-2800 BP), Middle (2800-1200 BP), and Late (1200-250 BP)] using commonly used statistical tests: chi-square, Fisher's exact, and odds ratios...
March 20, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28296166/bony-pits-in-the-ostrich-struthio-camelus-and-emu-dromaius-novaehollandiae-bill-tip
#13
Martina R Crole, John T Soley
A specialized region of the bill tip characterized by a complex arrangement of mechanoreceptors and referred to as a bill tip organ, has been identified in numerous avians. A bill tip organ was initially inferred in kiwi species by the presence of numerous, bony pits in the rostrum of the bill, and later confirmed histologically. This study enumerates and compares the number and distribution of pits present in the bill tip in the ostrich and emu. The heads from 10 ostrich and 5 emu were prepared for osteological examination...
March 14, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28280592/growth-overshoot-and-seasonal-size-changes-in-the-skulls-of-two-weasel-species
#14
Scott LaPoint, Lara Keicher, Martin Wikelski, Karol Zub, Dina K N Dechmann
Ontogenetic changes in mammalian skulls are complex. For a very few species (i.e. some Sorex shrews), these also include seasonally driven, bidirectional size changes within individuals, presumably to reduce energy requirements during low resource availabilities. These patterns are poorly understood, but are likely most pronounced in high-metabolic species with limited means for energy conservation. We used generalized additive models to quantify the effect of location, Julian day, age and sex on the length and depth of 512 and 847 skulls of stoat (Mustela erminea) and weasel (M...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28273959/morphometric-evaluation-of-adult-acromion-process-in-north-indian-population
#15
Susmita Saha, Neelam Vasudeva
INTRODUCTION: Dimensions of acromion process are important to show linkage to the shoulder girdle pathologies. Also morphometric analysis of acromion process would be helpful for surgeons while performing surgical procedures on the shoulder joint. AIM: The purpose of this present study was to observe the detailed morphometric evaluation of adult acromion processes in North Indian population because different morphometric dimensions play an important role in various disorders of the shoulder, particularly sub acromial impingement syndrome...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28268153/convergence-characteristics-between-a-rodent-the-south-american-lowland-paca-and-a-ruminant-the-african-water-chevrotain-an-exemplary-case-study
#16
Gérard Dubost
The level of convergence between a rodent, the South American lowland paca Cuniculus paca, and a ruminant, the African water chevrotain Hyemoschus aquaticus, is analysed using 231 characteristics belonging to different biological sectors. A convergence index is established based on the degree of rarity of each characteristic in each species compared to other members of its zoological group. Although the divergent characteristics are as numerous as the convergent ones, the two species are globally similar. Convergent characteristics occur in all biological categories, but their rate varies a great deal among them...
March 3, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/28243531/molecular-and-morphological-data-reveal-three-new-cryptic-species-of-chiasmocleis-mehely-1904-anura-microhylidae-endemic-to-the-atlantic-forest-brazil
#17
Mauricio C Forlani, João F R Tonini, Carlos A G Cruz, Hussam Zaher, Rafael O de Sá
Three new cryptic species of Chiasmocleis from the Atlantic Forest of Brazil are described. Two of these species occur in the northeastern states of Sergipe and Bahia, whereas the third species is found in the southeastern state of São Paulo. The new species can be distinguished from other congeneric species by the molecular data, as evidenced in the phylogeny, and by a combination of morphological characters including: size, foot webbing, dermal spines, and coloration patterns. Chiasmocleis species differ in osteological traits, therefore we also provide an osteological description of each new species and comparsions with data reported for other species in the genus...
2017: PeerJ
https://www.readbyqxmd.com/read/28235419/a-rabbit-model-for-experimental-alveolar-cleft-grafting
#18
Mohammad Kamal, Lars Andersson, Rene Tolba, Alexander Bartella, Felix Gremse, Frank Hölzle, Peter Kessler, Bernd Lethaus
OBJECTIVES: The purpose of the present study was to develop an animal model for creating alveolar cleft defects with properly simulated clinical defect environment for tissue-engineered bone-substitute materials testing without compromising the health of the animal. Cleft creation surgery was aimed at creating a complete alveolar cleft with a wide bone defect with an epithelial lining (oral mucosa) overlying the cleft defect. METHODS: A postmortem skull of a New Zealand White (NZW) rabbit skull (Oryctolagus cuniculus) underwent an osteological and imaging survey...
February 24, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28228667/three-new-species-of-the-killifish-genus-melanorivulus-from-the-central-brazilian-cerrado-savanna-cyprinodontiformes-aplocheilidae
#19
Wilson J E M Costa
Three new species are described from the Neotropical region comprising the Cerrado savannas of the central Brazilian plateaus, which is among the most important biodiversity centres in the world. These species are considered closely related to Melanorivulus dapazi from the same region, with which they share the presence of a rudimentary interarcual cartilage and a dark reddish brown distal margin on the male anal fin. The group comprising Melanorivulus dapazi and the three new species is here named as the Melanorivulus dapazi species group...
2017: ZooKeys
https://www.readbyqxmd.com/read/28224053/understanding-morphological-variability-in-a-taxonomic-context-in-chilean-diplomystids-teleostei-siluriformes-including-the-description-of-a-new-species
#20
Gloria Arratia, Claudio Quezada-Romegialli
Following study of the external morphology and its unmatched variability throughout ontogeny and a re-examination of selected morphological characters based on many specimens of diplomystids from Central and South Chile, we revised and emended previous specific diagnoses and consider Diplomystes chilensis, D. nahuelbutaensis, D. camposensis, and Olivaichthys viedmensis (Baker River) to be valid species. Another group, previously identified as Diplomystes sp., D. spec., D. aff. chilensis, and D. cf. chilensis inhabiting rivers between Rapel and Itata Basins is given a new specific name (Diplomystes incognitus) and is diagnosed...
2017: PeerJ
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