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https://www.readbyqxmd.com/read/28241382/passerine-morphology-external-measurements-of-ca-one-quarter-of-passerine-bird-species
#1
Robert E Ricklefs
Studies of community organization and clade diversification that include functional traits have become an important component of the analysis of ecological and evolved systems. Such studies frequently are limited by availability of consistently collected data. Here, I present a dataset including eight measurements of the external morphology of 1642 species, roughly one-quarter of all passerine birds (Aves: Order Passeriformes), from all parts of the world, characterizing the relative proportions of the wing, tail, legs, and beak...
February 27, 2017: Ecology
https://www.readbyqxmd.com/read/28237873/combined-effect-of-toe-out-gait-and-high-tibial-osteotomy-on-knee-adduction-moment-in-patients-with-varus-knee-deformity
#2
C Whelton, A Thomas, D W Elson, A Metcalfe, S Forrest, C Wilson, C Holt, G Whatling
BACKGROUND: Gait adaptations, including toe out gait, have been proposed as treatments for knee osteoarthritis. The clinical application of toe out gait, however, is unclear. This study aims to identify the changes in Knee adduction moment in varus knee deformity assessing toe out gait as an alternative to high tibial osteotomy, and if any change in dynamic loading persists post operatively, when anatomical alignment is restored. METHODS: Three-dimensional motion analysis was performed on 17 patients with medial compartment knee osteoarthritis and varus deformity prior to undergoing high tibial osteotomy, 13 patients were assessed post-operatively, and results compared to 13 healthy controls...
February 14, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28237654/exploring-phase-dependent-functional-gait-variability
#3
Daniel Hamacher, Dennis Hamacher, Roy Müller, Lutz Schega, Astrid Zech
Gait variability is frequently used to evaluate the sensorimotor system and elderly fallers compared to non-fallers exhibit an altered variability in gait parameters during unchanged conditions. While gait variability is often interpreted as movement error, it is also necessary to change the gait pattern in order to react to internal and external perturbations. This phenomenon has been described as functional variability and ensures the stability of gait motor control. The aim of the current study is to explore the functional variability in relation to the different phases of the gait cycle (phase-dependent gait variability)...
February 23, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28236965/ror-family-receptor-tyrosine-kinases
#4
Sigmar Stricker, Verena Rauschenberger, Alexandra Schambony
ROR-family receptor tyrosine kinases form a small subfamily of receptor tyrosine kinases (RTKs), characterized by a conserved, unique domain architecture. ROR RTKs are evolutionary conserved throughout the animal kingdom and act as alternative receptors and coreceptors of WNT ligands. The intracellular signaling cascades activated downstream of ROR receptors are diverse, including but not limited to ROR-Frizzled-mediated activation of planar cell polarity signaling, RTK-like signaling, and antagonistic regulation of WNT/β-Catenin signaling...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28229556/identification-of-clusters-of-foot-pain-location-in-a-community-sample
#5
Tiffany K Gill, Hylton B Menz, Karl B Landorf, John B Arnold, Anne W Taylor, Catherine L Hill
OBJECTIVE: To identify foot pain clusters according to pain location in a community based sample of the general population. METHODS: This study analysed data from the North West Adelaide Health Study. Data were obtained between 2004-2006, using Computer Assisted Telephone Interviewing, clinical assessment and self-completed questionnaire. The location of foot pain was assessed using a diagram during the clinical assessment. Hierarchical cluster analysis was undertaken to identify foot pain location clusters, which were then compared in relation to demographics, comorbidities and podiatry utilisation...
February 23, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28229355/femoral-shaft-osteotomy-for-obligate-outward-rotation-due-to-scfe
#6
Peter M Stevens, Lucas Anderson, Bruce A MacWilliams
Slipped capital femoral epiphysis (SCFE) is an adolescent disease that leads to retroversion of the femoral neck and shaft, relative to the head. Observing that patients with SCFE must walk with an outward foot progression angle and externally rotate the leg in order to flex the hip, we have been performing a femoral shaft rotational osteotomy wherein we rotate the lower femur 45° inward, relative to the upper femur. By correcting retroversion, our goal is to improve functional hip and knee motion, thereby mitigating the effects of SCFE impingement...
February 22, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28229166/-morphological-investigations-of-deep-sole-ulcers-in-cattle-part-2-toe-ulcers-white-line-disease-in-the-heel-and-changes-due-to-inappropriate-weight-bearing-and-deficient-claw-care
#7
Susanne Gehringer, Matthias Müller, Johann Maierl
OBJECTIVE: To demonstrate the morphology of pathological changes to the inner structures of the claw in cases of toe ulcers, white line disease in the heel and changes due to inappropriate weight bearing and deficient claw care. MATERIAL AND METHODS: Hind limbs of 55 cows displaying external signs of complicated sole ulcers were examined externally and internally. To examine the samples internally, a sagittal section was performed. Furthermore, the material was examined after bone maceration and histologically...
February 23, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28228509/the-use-of-clamping-grips-and-friction-pads-by-tree-frogs-for-climbing-curved-surfaces
#8
Thomas Endlein, Aihong Ji, Shanshan Yuan, Iain Hill, Huan Wang, W Jon P Barnes, Zhendong Dai, Metin Sitti
Most studies on the adhesive mechanisms of climbing animals have addressed attachment against flat surfaces, yet many animals can climb highly curved surfaces, like twigs and small branches. Here we investigated whether tree frogs use a clamping grip by recording the ground reaction forces on a cylindrical object with either a smooth or anti-adhesive, rough surface. Furthermore, we measured the contact area of fore and hindlimbs against differently sized transparent cylinders and the forces of individual pads and subarticular tubercles in restrained animals...
February 22, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28227913/online-learning-of-gait-models-for-calculation-of-gait-parameters
#9
Jamie L S Waugh, Anton Trinh, Ryan R Mohammed, William E McIlroy, Dana Kulic, Jamie L S Waugh, Anton Trinh, Ryan R Mohammed, William E McIlroy, Dana Kulic, Jamie L S Waugh, Dana Kulic, Anton Trinh, William E McIlroy, Ryan R Mohammed
This paper proposes a novel approach for gait analysis from wearable sensing, based on an adaptive periodic model of any gait signal. The proposed method learns a model of the gait cycle during online measurement, using a continuous representation that can adapt to inter and intra-personal variability by creating an individualized model. Once the algorithm has converged to the input signal, key gait events can be identified relative to the estimated gait phase; these events can then be used to calculate gait parameters...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227808/adaptive-decoding-using-local-field-potentials-in-a-brain-machine-interface
#10
Rosa So, Camilo Libedinsky, Kai Keng Ang, Wee Chiek Clement Lim, Kyaw Kyar Toe, Cuntai Guan, Rosa So, Camilo Libedinsky, Kai Keng Ang, Wee Chiek Clement Lim, Kyaw Kyar Toe, Cuntai Guan, Rosa So, Wee Chiek Clement Lim, Kai Keng Ang, Kyaw Kyar Toe, Camilo Libedinsky, Cuntai Guan
Brain-machine interface (BMI) systems have the potential to restore function to people who suffer from paralysis due to a spinal cord injury. However, in order to achieve long-term use, BMI systems have to overcome two challenges - signal degeneration over time, and non-stationarity of signals. Effects of loss in spike signals over time can be mitigated by using local field potential (LFP) signals for decoding, and a solution to address the signal non-stationarity is to use adaptive methods for periodic recalibration of the decoding model...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227650/real-time-gait-event-detection-for-lower-limb-amputees-using-a-single-wearable-sensor
#11
H F Maqbool, M A B Husman, M I Awad, A Abouhossein, P Mehryar, N Iqbal, A A Dehghani-Sanij, H F Maqbool, M A B Husman, M I Awad, A Abouhossein, P Mehryar, N Iqbal, A A Dehghani-Sanij, M A B Husman, M I Awad, N Iqbal, P Mehryar, H F Maqbool, A Abouhossein, A A Dehghani-Sanij
This paper presents a rule-based real-time gait event/phase detection system (R-GEDS) using a shank mounted inertial measurement unit (IMU) for lower limb amputees during the level ground walking. Development of the algorithm is based on the shank angular velocity in the sagittal plane and linear acceleration signal in the shank longitudinal direction. System performance was evaluated with four control subjects (CS) and one transfemoral amputee (TFA) and the results were validated with four FlexiForce footswitches (FSW)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227640/hardness-map-of-human-meta-tarsals-and-phalanges-of-toes
#12
Irfan Manarvi, Irfan Manarvi, Irfan Manarvi
Predicting location of fracture in human bones has been a keen area of research for the past few decades. A variety of tests for hardness, deformation and strain field measurement have been conducted in the past; but considered insufficient due to various limitations. Researchers therefore have proposed further studies due to inaccuracies in measurement methods, testing machines and experimental errors. Advancement and availability of hardware, measuring instrumentation and testing machines can now provide remedies to these limitations...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227629/inertial-sensor-based-gait-analysis-discriminates-subjects-with-and-without-visual-impairment-caused-by-simulated-macular-degeneration
#13
Christoph M Kanzler, Jens Barth, Jochen Klucken, Bjoern M Eskofier, Christoph M Kanzler, Jens Barth, Jochen Klucken, Bjoern M Eskofier, Jens Barth, Jochen Klucken, Bjoern M Eskofier, Christoph M Kanzler
Macular degeneration is the third leading cause of blindness worldwide and the leading cause of blindness in the developing world. The analysis of gait parameters can be used to assess the influence of macular degeneration on gait. This study examines the effect of macular degeneration on gait using inertial sensor based 3D spatio-temporal gait parameters. We acquired gait data from 21 young and healthy subjects during a 40 m obstacle walk. All subjects had to perform the gait trial with and without macular degeneration simulation glasses...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223754/almost-unilateral-focal-dermal-hypoplasia
#14
Solam Lee, Sung Jay Choe, Sung Ku Ahn
Focal dermal hypoplasia, caused by mutations in PORCN, is an X-linked ectodermal dysplasia, also known as Goltz syndrome. Only seven cases of unilateral or almost unilateral focal dermal hypoplasia have been reported in the English literature and there have been no previously reported cases in the Republic of Korea. A 19-year-old female presented with scalp defects, skin lesions on the right leg and the right trunk, and syndactyly of the right fourth and fifth toes. Cutaneous examination revealed multiple atrophic plaques and a brown and yellow mass with fat herniation and telangiectasia that was mostly located on the lower right leg...
February 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28222057/effects-of-toe-in-and-wider-step-width-in-stair-ascent-with-different-knee-alignments
#15
Hunter J Bennett, Songning Zhang, Guangping Shen, Joshua T Weinhandl, Max R Paquette, Jeffrey Reinbolt, Dawn P Coe
PURPOSE: Toe-in (TI) and toe-in with wider step width (TIW) gait modifications have successfully reduced the internal peak knee adduction moment (KAM) during level walking and stair ascent tasks, respectively, for healthy and knee osteoarthritis populations. However, the concurrent effects of these modifications have not previously been combined to reduce both the first and the second peak KAM during stair ascent or tested among the different knee alignment groups. Therefore, the purpose of this study was to examine effects of TI and TIW gait modifications on knee biomechanics during stair ascent in individuals with varus, neutral, and valgus knee alignments...
March 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28222048/comparison-of-running-economy-values-while-wearing-no-shoes-minimal-shoes-and-normal-running-shoes
#16
Robbie G Cochrum, Ryan T Connors, John M Coons, Dana K Fuller, Don W Morgan, Jennifer L Caputo
Cochrum, RG, Connors, RT, Coons, JM, Fuller, DK, Morgan, DW, and Caputo, JL. Comparison of running economy values while wearing no shoes, minimal shoes, and normal running shoes. J Strength Cond Res 31(3): 595-601, 2017-The purpose of this study was to quantify differences in running economy (RE) at 50 and 70% of each subject's velocity at V[Combining Dot Above]O2max (vV[Combining Dot Above]O2max) across barefoot and 2 mass, stack height, and heel-to-toe-drop controlled footwear conditions (minimal shoes and normal running shoes) in 9 recreational distance runners (mean age 26...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28221337/modulation-of-digital-flexor-tendon-healing-by-vascular-endothelial-growth-factor-gene-transfection-in-a-chicken-model
#17
W F Mao, Y F Wu, Q Q Yang, Y L Zhou, J B Tang
A major challenge in tendon injury is the weak intrinsic healing capacity of tendon, which may cause re-rupture after surgery. Growth factors are believed to be critical during tendon healing. This study aimed to investigate the effects of vascular endothelial growth factor (VEGF) genes delivered by adeno-associated virus (AAV) vectors on tendon healing and molecular events involved in a chicken model. One hundred and twenty eight deep flexor tendons in the long toes of chickens were completely transected and injected with 2 × 10(9) particles of AAV2-VEGF or saline before surgically repaired...
February 21, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28220914/the-association-between-body-built-and-injury-occurrence-in-pre-professional-ballet-dancers-separated-analysis-for-the-injured-body-locations
#18
Petra Zaletel, Damir Sekulić, Nataša Zenić, Michael R Esco, Dorica Šajber, Miran Kondrič
OBJECTIVES: This study has aimed at identifying prevalence of injury-occurrence in 24 pre-professional-ballet-dancers (females, 16-18 years of age), and identifying the associations between the body-built and prevalence of injuries. MATERIAL AND METHODS: The sample of variables included: body mass, body height, and 3 somatotype characteristics (mesomorph, ectomorph and endomorph) and data on injuries over the preceding year. RESULTS: Dancers were mostly ectomorphic-mesomorph (endomorphy: 2...
February 21, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28220077/noninvasive-assessment-of-the-effect-of-position-and-exercise-on-pulse-arrival-to-peripheral-vascular-beds-in-healthy-volunteers
#19
Yurie Obata, Qi J Ong, J T Magruder, Helen Grichkevitch, Dan E Berkowitz, Daniel Nyhan, Jochen Steppan, Viachaslau Barodka
Background: The effects of position and exercise on pulse wave distribution across a healthy, compliant arterial tree are not fully understood. We studied the effects of exercise and position on the pattern of pulse arrival times (PATs) in healthy volunteers. Moreover, we compared the pulse arrival time ratios to the respective distance ratios between different locations. Methods: Thirteen young healthy volunteers were studied, using an electrocardiogram and plethysmograph to simultaneously record pulse wave arrival at the ear lobe, index finger and big toe...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28219806/structural-characterization-and-viscoelastic-constitutive-modeling-of-skin
#20
Vincent R Sherman, Yizhe Tang, Shiteng Zhao, Wen Yang, Marc A Meyers
: A fascinating material, skin has a tensile response which exhibits an extended toe region of minimal stress up to nominal strains that, in some species, exceed 1, followed by significant stiffening until a roughly linear region. The large toe region has been attributed to its unique structure, consisting of a network of curved collagen fibers. Investigation of the structure of rabbit skin reveals that it consists of layers of wavy fibers, each one with a characteristic orientation. Additionally, the existence of two preferred layer orientations is suggested based on the results of small angle x-ray scattering...
February 17, 2017: Acta Biomaterialia
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