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https://www.readbyqxmd.com/read/28449202/barn-owls-maximize-head-rotations-by-a-combination-of-yawing-and-rolling-in-functionally-diverse-regions-of-the-neck
#1
Markus Krings, John A Nyakatura, Mark L L M Boumans, Martin S Fischer, Hermann Wagner
Owls are known for their outstanding neck mobility: these birds can rotate their heads more than 270°. The anatomical basis of this extraordinary neck rotation ability is not well understood. We used X-ray fluoroscopy of living owls as well as forced neck rotations in dead specimens and computer tomographic (CT) reconstructions to study how the individual cervical joints contribute to head rotation in barn owls (Tyto furcata pratincola). The X-ray data showed the natural posture of the neck, and the reconstructions of the CT-scans provided the shapes of the individual vertebrae...
April 27, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28447899/the-american-college-of-surgeons-minimum-standards-for-hospitals-and-the-provision-of-high-quality-laboratory-services
#2
James R Wright
CONTEXT: - The first major project of the American College of Surgeons (Chicago, Illinois), founded in 1913, was implementing Minimum Standards for Hospitals. The 1918 standard (1) established medical staff organizations in hospitals; (2) restricted membership to licensed practitioners in good standing; (3) mandated that the medical staff work with hospital administration to develop and adopt regulations and policies governing their professional work; (4) required standardized, accessible medical records; and (5) required availability of diagnostic and therapeutic facilities...
May 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/28445658/a-time-and-a-place-for-everything-phylogenetic-history-and-geography-as-joint-predictors-of-oak-plastome-phylogeny
#3
Kasey Khanh Pham, Andrew L Hipp, Paul S Manos, Richard C Cronn
Due to high rates of introgressive hybridization, the plastid genome is poorly suited to fine-scale DNA barcoding and phylogenetic studies of the oak genus (Quercus, Fagaceae). At the tips of the oak plastome phylogeny, recent gene migration and reticulation generally cause topology to reflect geographic structure, while deeper branches reflect lineage divergence. In this study, we quantify the simple and partial effects of geographic proximity and nucleome-inferred phylogenetic history on oak plastome phylogeny at different evolutionary scales...
April 26, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28439172/management-of-chronic-recurrent-dislocation-of-temporomandibular-joint-using-u-shaped-graft-a-new-restrictive-technique
#4
Kiran Gadre, Divya Singh, Pushkar Gadre, Rajshekhar Halli
BACKGROUND: Numerous procedures have been described for the treatment of chronic recurrent dislocation of the temporo-mandibular joint (TMJ), either in the form of enhancement or restriction of the condylar movement, with their obvious merits and demerits. MATERIALS AND METHOD: We present a new technique of using U shaped iliac bone graft to restrict the condylar movement and its advantages over the conventional techniques.We have used this technique successfully in 8 cases where Dautrey's procedure had failed with follow up period of 2 years...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28435577/intra-articular-localized-haemangioma-of-the-knee-mimicking-localized-pigmented-villonodular-synovitis-a-case-report
#5
G K Goki-Kamei, N M Norimasa-Matsubara, T T Teruyasu-Tanaka, K N Koji-Natsu, T S Toshihiro-Sugioka
Intra-articular synovial haemangioma of the knee is a benign tumour. However, diagnostic delay leads to degenerative changes in the cartilage and osteoarthritis due to recurrent haemarthrosis. Therefore, treatment should be performed immediately. We report the case of a localized synovial haemangioma arising from the medial plica in a 38-year old female presenting with pain and restricted range of motion in the right knee joint. Initially, we diagnosed this case as a localized pigmented villonodular synovitis (LPVS) based on MRI and arthroscopic findings and performed only arthroscopic en bloc excision of the mass and synovectomy around the mass for diagnostic confirmation...
March 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28428846/long-term-and-widespread-changes-in-agricultural-practices-influence-ring-necked-pheasant-abundance-in-california
#6
Peter S Coates, Brianne E Brussee, Kristy B Howe, Joseph P Fleskes, Ian A Dwight, Daniel P Connelly, Matt G Meshriy, Scott C Gardner
Declines in bird populations in agricultural regions of North America and Europe have been attributed to agricultural industrialization, increases in use of agrochemical application, and increased predation related to habitat modification. Based on count data compiled from Breeding Bird Survey (BBS) from 1974 to 2012, Christmas Bird Count (CBC) collected from 1914 to 2013, and hunter data from Annual Game Take Survey (AGTS) for years 1948-2010, ring-necked pheasants (Phasianus colchicus) in California have experienced substantial declines in agricultural environments...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28424656/empirical-comparison-of-diffusion-kurtosis-imaging-and-diffusion-basis-spectrum-imaging-using-the-same-acquisition-in-healthy-young-adults
#7
Sijia Wang, Daniel J Peterson, Yong Wang, Qing Wang, Thomas J Grabowski, Wenbin Li, Tara M Madhyastha
As diffusion tensor imaging gains widespread use, many researchers have been motivated to go beyond the tensor model and fit more complex diffusion models, to gain a more complete description of white matter microstructure and associated pathology. Two such models are diffusion kurtosis imaging (DKI) and diffusion basis spectrum imaging (DBSI). It is not clear which DKI parameters are most closely related to DBSI parameters, so in the interest of enabling comparisons between DKI and DBSI studies, we conducted an empirical survey of the interrelation of these models in 12 healthy volunteers using the same diffusion acquisition...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28419031/prognostic-factors-affecting-union-after-ulnar-shortening-osteotomy-in-ulnar-impaction-syndrome-a-retrospective-case-control-study
#8
Soo Min Cha, Hyun Dae Shin, Ki Jun Ahn
BACKGROUND: Ulnar shortening osteotomy (USO) is a widely adopted procedure with excellent outcomes. However, delayed union or nonunion has occasionally been observed. The purpose of this retrospective case-control study was to identify variables affecting osseous consolidation after USO in patients with ulnar impaction syndrome. METHODS: The study included 325 patients who had undergone USO between March 2008 and March 2014. We evaluated the association between union and basic demographic factors as well as preoperative pain (assessed on a visual analog scale [VAS]), range of wrist motion, grip strength, and modified Mayo wrist score...
April 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28413139/evaluation-of-extensor-mechanism-in-revision-knee-arthroplasty
#9
Vadym Zhamilov, Vasfi Karatosun, Serpil Kalkan, Bayram Unver, Izge Gunal
BACKGROUND: The success of revision total knee arthroplasty depends on adequate exposure that does not produce complications. The purpose of this study was to compare the results of revision total knee arthroplasty between V-Y quadricepsplasty (QP) and quadriceps snip (QS) approaches. METHODS: In the study, 92 knees with follow-up of 12-108 months which were operated by using QP (55) and QS (37) were evaluated retrospectively. Measurements were taken by using universal transparent goniometer, also varus valgus deformities, knee flexion angles, instability, Hospital for Special Surgery and Lower Extremity Functional Scale scores, functional condition of the knee and activity levels of the patients were evaluated cross-sectionally...
March 22, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28412710/triple-oral-therapy-versus-antitumor-necrosis-factor-plus-methotrexate-mtx-in-patients-with-rheumatoid-arthritis-and-inadequate-response-to-mtx-a-systematic-literature-review
#10
Julia Mary, Michel De Bandt, Cédric Lukas, Jacques Morel, Bernard Combe
OBJECTIVE: For patients with rheumatoid arthritis (RA) who have an inadequate response to methotrexate (MTX), the relative effectiveness of the combination of conventional disease-modifying antirheumatic drugs (DMARD) compared with the combination of tumor necrosis factor (TNF) inhibitors and MTX, as second-line therapy, is uncertain. The aim of this study was to compare the efficacy and tolerance of triple oral DMARD therapy versus anti-TNF agents associated with MTX in patients with RA after MTX failure...
April 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28408960/molecular-characterization-and-function-of-tenomodulin-a-marker-of-tendons-and-ligaments-that-integrate-musculoskeletal-components
#11
REVIEW
Chisa Shukunami, Yuki Yoshimoto, Aki Takimoto, Hiroshi Yamashita, Yuji Hiraki
Tendons and ligaments are dense fibrous bands of connective tissue that integrate musculoskeletal components in vertebrates. Tendons connect skeletal muscles to the bone and function as mechanical force transmitters, whereas ligaments bind adjacent bones together to stabilize joints and restrict unwanted joint movement. Fibroblasts residing in tendons and ligaments are called tenocytes and ligamentocytes, respectively. Tenomodulin (Tnmd) is a type II transmembrane glycoprotein that is expressed at high levels in tenocytes and ligamentocytes, and is also present in periodontal ligament cells and tendon stem/progenitor cells...
November 2016: Japanese Dental Science Review
https://www.readbyqxmd.com/read/28405221/assessment-of-the-restriction-of-arm-elevation-after-intramedullary-fixation-for-proximal-humeral-fractures
#12
Hiroaki Inui, Katsuya Nobuhara
BACKGROUND: Nail protrusion is suspected as a reason for the restriction of arm elevation after antegrade nailing of proximal humeral fractures, although assessment of the restriction of the glenohumeral joint during arm elevation has been insufficient. METHODS: In this retrospective study, 30 shoulders with proximal humeral fractures in 29 cases were treated with Polarus short nails (Acumed, Beaverton, OR, USA). At a mean final follow-up of 14 months, clinical outcomes, bony union, alignment including retroversion of the head and entry points of the nails were evaluated...
April 2017: Shoulder & Elbow
https://www.readbyqxmd.com/read/28402759/medial-posterior-capsular-plication-reduces-anterior-shoulder-instability-similar-to-remplissage-without-restricting-motion-in-the-setting-of-an-engaging-hill-sachs-defect
#13
Brian C Werner, Xiang Chen, Christopher L Camp, Andreas Kontaxis, Joshua S Dines, Lawrence V Gulotta
BACKGROUND: Numerous surgical options for the management of engaging Hill-Sachs lesions exist, of which remplissage has emerged as one of the most popular arthroscopic techniques. Remplissage is not without disadvantages, however, and has been demonstrated to potentially result in a loss of external rotation (ER) due to nonanatomic tethering of the infraspinatus tendon and a potential decrease in infraspinatus strength clinically. PURPOSE: The efficacy of posterior medial capsular plication in addition to Bankart repair was examined as an arthroscopic management strategy for an engaging Hill-Sachs defect...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28399930/radiographic-damage-in-hands-and-wrists-of-patients-with-juvenile-idiopathic-arthritis-after-29%C3%A2-years-of-disease-duration
#14
Anne M Selvaag, Eva Kirkhus, Lena Törnqvist, Vibke Lilleby, Hanne A Aulie, Berit Flatø
BACKGROUND: There are few studies on radiographic outcome after long-term disease duration in juvenile idiopathic arthritis (JIA). We wanted to evaluate 29-year radiographic outcome in hands/wrists and predictors of damage in patients with long-term active JIA. METHODS: Patients diagnosed from 1980 to 1985, who had active disease at 15-, 23- or 29-year follow-up and arthritis in the wrists during the disease course, were reexamined with radiographs of hands/wrists...
April 11, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28391192/estimation-of-large-motion-in-lung-ct-by-integrating-regularized-keypoint-correspondences-into-dense-deformable-registration
#15
Jan Ruhaak, Thomas Polzin, Stefan Heldmann, Ivor Simpson, Heinz Handels, Jan Modersitzki, Mattias Paul Heinrich
We present a novel algorithm for the registration of pulmonary CT scans. Our method is designed for large respiratory motion by integrating sparse keypoint correspondences into a dense continuous optimization framework. The detection of keypoint correspondences enables robustness against large deformations by jointly optimizing over a large number of potential discrete displacements, whereas the dense continuous registration achieves sub-voxel alignment with smooth transformations. Both steps are driven by the same normalized gradient fields data term...
April 5, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28390760/restricted-mandibular-movement-attributed-to-ossification-of-mandibular-depressors-and-medial-pterygoid-muscles-in-patients-with-fibrodysplasia-ossificans-progressiva-a-report-of-3-cases
#16
Tetsuko Okuno, Hitoshi Suzuki, Akio Inoue, Jingo Kusukawa
Fibrodysplasia ossificans progressiva (FOP) is an extremely rare genetic condition characterized by congenital malformation and progressive heterotopic ossification (HO) caused by a recurrent single nucleotide substitution at position 617 in the ACVR1 gene. As the condition progresses, HO leads to joint ankylosis, breathing difficulties, and mouth-opening restriction, and it can shorten the patient's lifespan. This report describes 3 cases of FOP confirmed by genetic testing in patients with restricted mouth opening...
March 16, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28385001/comparative-kinematic-gait-analysis-in-young-and-old-beagle-dogs
#17
Malin Lorke, Maray Willen, Karin Lucas, Martin Beyerbach, Patrick Wefstaedt, Hugo Murua Escobar, Ingo Nolte
Age-related involution in dogs involves loss of muscle mass and changes in connective tissue and articular cartilage. The aim of this study was to examine whether an age-related influence on joint mobility can be detected in the absence of diseases. Five young (Ø 2.0 years) and five old (Ø 10.4 years) healthy and sound Beagle dogs were measured during locomotion on a treadmill by computer-assisted gait analysis. Angles of the shoulder, elbow, carpal, hip, stifle and tarsal joints were analyzed, including joint angle progression curves, minimum and maximum joint angles and range of motion (ROM)...
April 6, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28382433/apoptosis-induced-by-low-level-laser-in-polymorphonuclear-cells-of-acute-joint-inflammation-comparative-analysis-of-two-energy-densities
#18
Lúcia Mara Januário Dos Anjos, Adenilson de Souza da Fonseca, Jacy Gameiro, Flávia de Paoli
Anti-inflammatory property of low-level laser therapy (LLLT) has been widely described in literature, although action mechanisms are not always clarified. Thus, this study aimed to evaluate apoptosis mechanisms in the LLLT anti-inflammatory effects on the arthritis experimental model in vivo at two different energy densities (3 and 30 Jcm(-2)). Arthritis was induced in mice by zymosan solution, animals were distributed into five groups, and morphological analysis, immunocytochemistry and gene expressions for apoptotic proteins were performed...
April 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28379375/clinical-serological-and-virological-analysis-of-572-chikungunya-patients-during-the-years-2010-2013-from-india
#19
Jaspreet Jain, Kaustuv Nayak, Neha Tanwar, Rajni Gaind, Bhupendra Gupta, J S Shastri, Raj K Bhatnagar, Murali Krishna Kaja, Anmol Chandele, Sujatha Sunil
Background: Chikungunya fever (CHIK) is a major public health concern in India. Characterized by acute fever with debilitating joint pain/swelling, most patients recover from this self-limiting illness in 7-10 days with cessation of joint pains post-acute episode. However, in some patients, joint pain persists, lasting for months or even years. The precise correlates to the chronic phase of this debilitating illness and/or this remarkable heterogeneity in disease manifestation are poorly understood...
April 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28375317/interaction-of-aberrations-diffraction-and-quantal-fluctuations-determine-the-impact-of-pupil-size-on-visual-quality
#20
Renfeng Xu, Huachun Wang, Larry N Thibos, Arthur Bradley
Our purpose is to develop a computational approach that jointly assesses the impact of stimulus luminance and pupil size on visual quality. We compared traditional optical measures of image quality and those that incorporate the impact of retinal illuminance dependent neural contrast sensitivity. Visually weighted image quality was calculated for a presbyopic model eye with representative levels of chromatic and monochromatic aberrations as pupil diameter was varied from 7 to 1 mm, stimulus luminance varied from 2000 to 0...
April 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
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