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https://www.readbyqxmd.com/read/28911905/gaussian-process-classification-of-superparamagnetic-relaxometry-data-phantom-study
#1
Javad Sovizi, Kelsey B Mathieu, Sara L Thrower, Wolfgang Stefan, John D Hazle, David Fuentes
MOTIVATION: Superparamagnetic relaxometry (SPMR) is an emerging technology that holds potential for use in early cancer detection. Measurement of the magnetic field after the excitation of cancer-bound superparamagnetic iron oxide nanoparticles (SPIONs) enables the reconstruction of SPIONs spatial distribution and hence tumor detection. However, image reconstruction often requires solving an ill-posed inverse problem that is computationally challenging and sensitive to measurement uncertainty...
July 24, 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28843480/conjoined-tendon-transfer-for-traumatic-anterior-glenohumeral-instability-in-patients-with-large-bony-defects-and-anterior-capsulolabral-deficiency
#2
Wiemi A Douoguih, David Goodwin, Ryan Churchill, Megan Paulus, Abby Maxwell
PURPOSE: To report outcomes of a conjoined tendon transfer procedure in a small case series of young active patients of various activity levels with recurrent traumatic anterior shoulder instability. METHODS: A retrospective chart review identified 10 consecutive patients who underwent conjoined tendon transfer (8 open and 2 arthroscopic) for anterior glenohumeral instability from January 2009 through December 2012. The indications were traumatic anterior shoulder instability with 25% or greater anterior glenoid bone loss, engaging Hill-Sachs lesion, or absent anterior-inferior labral tissue with anterior capsular tissue that did not readily hold sutures or a combination of these deficiencies...
August 23, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28830230/radiological-predictors-of-complete-cytoreduction-in-59-patients-with-peritoneal-mesothelioma-treated-with-cytoreductive-surgery-and-hyperthermic-intraperitoneal-chemotherapy-at-a-uk-referral-centre
#3
Anuradha Chandramohan, Andrew Thrower, Nehal Shah, Faheez Mohamed
OBJECTIVE: To assess the imaging features of peritoneal mesothelioma and identify key anatomical sites that aid patient selection for complete cytoreduction. METHODS: Pre-operative imaging of 59 (32 males, 27 females) patients who underwent cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (HIPEC) for histologically proven peritoneal mesothelioma [36 malignant peritoneal mesothelioma (MPM), 23 cystic mesothelioma (CM)] were reviewed. Imaging findings were correlated with surgical outcome...
August 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28806094/the-relationship-of-throwing-arm-mechanics-and-elbow-varus-torque-within-subject-variation-for-professional-baseball-pitchers-across-82-000-throws
#4
Christopher L Camp, Travis G Tubbs, Glenn S Fleisig, Joshua S Dines, David M Dines, David W Altchek, Brittany Dowling
BACKGROUND: Likely due to the high level of strain exerted across the elbow during the throwing motion, elbow injuries are on the rise in baseball. To identify at-risk athletes and guide postinjury return-to-throw programs, a better understanding of the variables that influence elbow varus torque is desired. PURPOSE: To describe the within-subject relationship between elbow varus torque and arm slot and arm rotation in professional baseball pitchers. STUDY DESIGN: Descriptive laboratory study...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28742607/pitch-counts-in-youth-baseball-and-softball-a-historical-review
#5
Brian T Feeley, Jessica Schisel, Julie Agel
OBJECTIVE: Pitching injuries are getting increased attention in the mass media. Many references are made to pitch counts and the role they play in injury prevention. The original purpose of regulating the pitch count in youth baseball was to reduce injury and fatigue to pitchers. This article reviews the history and development of the pitch count limit in baseball, the effect it has had on injury, and the evidence regarding injury rates on softball windmill pitching. DATA SOURCE: Literature search through PubMed, mass media, and organizational Web sites through June 2015...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28669547/the-effects-of-wrist-motion-and-hand-orientation-on-muscle-forces-a-physiologic-wrist-simulator-study
#6
Darshan S Shah, Claire Middleton, Sabahat Gurdezi, Maxim D Horwitz, Angela E Kedgley
Although the orientations of the hand and forearm vary for different wrist rehabilitation protocols, their effect on muscle forces has not been quantified. Physiologic simulators enable a biomechanical evaluation of the joint by recreating functional motions in cadaveric specimens. Control strategies used to actuate joints in physiologic simulators usually employ position or force feedback alone to achieve optimum load distribution across the muscles. After successful tests on a phantom limb, unique combinations of position and force feedback - hybrid control and cascade control - were used to simulate multiple cyclic wrist motions of flexion-extension, radioulnar deviation, dart thrower's motion, and circumduction using six muscles in ten cadaveric specimens...
July 26, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28664327/effects-of-mindfulness-practice-on-performance-relevant-parameters-and-performance-outcomes-in-sports-a-meta-analytical-review
#7
REVIEW
Lucia Bühlmayer, Daniel Birrer, Philipp Röthlin, Oliver Faude, Lars Donath
BACKGROUND: Mindfulness as a present-oriented form of mental training affects cognitive processes and is increasingly considered meaningful for sport psychological training approaches. However, few intervention studies have examined the effects of mindfulness practice on physiological and psychological performance surrogates or on performance outcomes in sports. OBJECTIVE: The aim of the present meta-analytical review was to examine the effects of mindfulness practice or mindfulness-based interventions on physiological and psychological performance surrogates and on performance outcomes in sports in athletes over 15 years of age...
June 29, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28639753/screening-for-ovarian-cancer-imaging-challenges-and-opportunities-for-improvement
#8
EDITORIAL
Kelsey B Mathieu, Deepak G Bedi, Sara L Thrower, Aliya Qayyum, Robert C Bast
The United Kingdom Collaborative Trial of Ovarian Cancer Screening (UKCTOCS) recently reported a reduction in the average overall mortality among ovarian cancer patients screened with an annual sequential, multimodal strategy that tracked biomarker CA125 over time, where increasing serum CA125 levels prompted ultrasound. However, multiple cases were documented wherein serum CA125 levels were rising, but ultrasound screens were normal, thus delaying surgical intervention. A significant factor which could contribute to false negatives is that many aggressive ovarian cancers are believed to arise from epithelial cells on the fimbriae of the fallopian tubes, which are not readily imaged...
June 22, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28639299/understanding-suicide-across-the-lifespan-a-united-states-perspective-of-suicide-risk-factors-assessment-management
#9
Ian H Steele, Natasha Thrower, Paul Noroian, Fabian M Saleh
Suicide is a troubling, preventable phenomenon. Prior to attempts, individuals often seek help, prompting practitioners to perform risk assessments that ideally use evidence-based risk management strategies. A literature review was performed using Harvard Countway Library of Medicine, Google Scholar, PubMed. Key words used were "Forensic Science," "Suicide Risk Management," "Pediatric Suicide Risk Factors," "Adult Suicide Risk Factors," "Geriatric Suicide Risk Factors," "Suicide Risk Assessment." Parameters limited articles to studies/reviews completed in the past twenty years in the United States...
June 21, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28633608/biomechanics-of-increased-spin-velocity-of-flying-discs-during-forehand-throws-by-skilled-and-unskilled-throwers
#10
Kei Sasakawa, Koji Umegaki, Shinji Sakurai
We aimed to assess the relationship between throwing distance and kinematic release parameters of the flying disc in unskilled throwers, and to assess the relationship between kinetic variables acting on flying discs and the change in spin velocity during long forehand throws by skilled and unskilled throwers. Ten skilled and eleven unskilled throwers performed throws at maximum effort. Reflective marker positions on the disc and body were recorded with a 3D motion capture system during the throws to derive kinematic variables of a disc and kinetic variables acting on the disc...
June 20, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28632049/kinematic-comparison-of-the-seoi-nage-judo-technique-between-elite-and-college-athletes
#11
Takanori Ishii, Michiyoshi Ae, Yuta Suzuki, Yasuto Kobayashi
This study sought to identify biomechanical factors that determine fast and skilful execution of the seoi-nage (shoulder throw) technique by comparing kinematics between elite and college judo athletes. Three-dimensional motion data were captured using a VICON-MX system with 18 cameras operating at 250 Hz as three male elite and seven male college judo athletes performed seoi-nage. No significant difference was found in motion phase time of the turning phase between the two groups, indicating that motion phase time is not necessarily a factor contributing quickness in seoi-nage...
February 24, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28607764/chronic-medial-instability-of-the-elbow
#12
REVIEW
Felix H Savoie, Michael O'Brien
Damage to the medial collateral ligament of the elbow from an instability episode usually heals with non-operative treatment. In some cases, residual instability may occur, leading to functional impairment.Non-operative management can be successful when bracing, taping and therapy are used to stabilise the elbow.A recent report detailing the efficacy of platelet-rich plasma in effectively treating ulnar collateral ligament (UCL) injuries in throwers has shown promise. However, there remain specific groups that should be considered for repair or reconstruction...
January 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28594005/the-effect-of-stw-defects-on-the-mechanical-properties-and-fracture-toughness-of-pristine-and-hydrogenated-graphene
#13
Akarsh Verma, Avinash Parashar
Graphene is emerging as a versatile material with a diverse field of applications. Synthesis techniques for graphene introduce several topological defects such as vacancies, dislocations and Stone-Thrower-Wales (STW) defects. Among them STW defects are generated without deleting any atom from the lattice position, but are introduced by rotating single C-C bonds. In this article, molecular dynamics based simulations have been performed to study the effect of STW defects on the fracture toughness of pristine graphene as well as graphene with crack edges passivated with hydrogen atoms...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28584114/establishment-of-a-vernalization-requirement-in-brachypodium-distachyon-requires-repressor-of-vernalization1
#14
Daniel P Woods, Thomas S Ream, Frédéric Bouché, Joohyun Lee, Nicholas Thrower, Curtis Wilkerson, Richard M Amasino
A requirement for vernalization, the process by which prolonged cold exposure provides competence to flower, is an important adaptation to temperate climates that ensures flowering does not occur before the onset of winter. In temperate grasses, vernalization results in the up-regulation of VERNALIZATION1 (VRN1) to establish competence to flower; however, little is known about the mechanism underlying repression of VRN1 in the fall season, which is necessary to establish a vernalization requirement. Here, we report that a plant-specific gene containing a bromo-adjacent homology and transcriptional elongation factor S-II domain, which we named REPRESSOR OF VERNALIZATION1 (RVR1), represses VRN1 before vernalization in Brachypodium distachyon That RVR1 is upstream of VRN1 is supported by the observations that VRN1 is precociously elevated in an rvr1 mutant, resulting in rapid flowering without cold exposure, and the rapid-flowering rvr1 phenotype is dependent on VRN1 The precocious VRN1 expression in rvr1 is associated with reduced levels of the repressive chromatin modification H3K27me3 at VRN1, which is similar to the reduced VRN1 H3K27me3 in vernalized plants...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28528627/physical-risk-factors-identification-based-on-body-sensor-network-combined-to-videotaping
#15
Nicolas Vignais, Fabien Bernard, Gérard Touvenot, Jean-Claude Sagot
The aim of this study was to perform an ergonomic analysis of a material handling task by combining a subtask video analysis and a RULA computation, implemented continuously through a motion capture system combining inertial sensors and electrogoniometers. Five workers participated to the experiment. Seven inertial measurement units, placed on the worker's upper body (pelvis, thorax, head, arms, forearms), were implemented through a biomechanical model of the upper body to continuously provide trunk, neck, shoulder and elbow joint angles...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28513271/college-pitchers-demonstrate-directional-differences-in-shoulder-joint-position-sense-compared-to-controls
#16
John Andrew Badagliacco, Andrew Karduna
CONTEXT: The relationship between overhead throwing and its effect on proprioception is not well understood. It is important to gain a better understanding of how these are related to protect overhead athletes from an increased risk of injury. OBJECTIVE: To investigate proprioceptive alterations in the overhead thrower's shoulder. DESIGN: Cross-Sectional Study. Independent variables are: limb (dominant and non-dominant), group (thrower or control), and target angle...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28486339/acute-effect-of-upper-and-lower-body-postactivation-exercises-on-shot-put-performance
#17
Eleni I Kontoy, Fani Berberidou, Theophilos C Pilianidis, Nikolaos I Mantzouranis, Spyridon K Methenitis
The purpose of the present study was to investigate the effect of different types of upper and lower' extremities exercises on acute increase of shot put performance, in moderate experienced throwers. Eight (n=8) males and nine (n=9) female throwers participated in the present study. Their bench press and squat maximum strength were measured while their shot put performance from power position was evaluated before and after four interventions: [1] plyometric push-ups (Plyo), [2] 6s isometric push-ups (Iso), [3] 3 countermovement jumps (CMJ) and [4] 10 reps...
May 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28451614/the-functional-arm-scale-for-throwers-fast-part-ii-reliability-and-validity-of-an-upper-extremity-region-specific-and-population-specific-patient-reported-outcome-scale-for-throwing-athletes
#18
Kellie C Huxel Bliven, Alison R Snyder Valier, R Curtis Bay, Eric L Sauers
BACKGROUND: The Functional Arm Scale for Throwers (FAST) is an upper extremity (UE) region-specific and population-specific patient-reported outcome (PRO) scale developed to measure health-related quality of life in throwers with UE injuries. Stages I and II, described in a companion paper, of FAST development produced a 22-item scale and a 9-item pitcher module. Stage III of scale development, establishing reliability and validity of the FAST, is reported herein. PURPOSE: To describe stage III of scale development: reliability and validity of the FAST...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28451608/the-functional-arm-scale-for-throwers-fast-part-i-the-design-and-development-of-an-upper-extremity-region-specific-and-population-specific-patient-reported-outcome-scale-for-throwing-athletes
#19
Eric L Sauers, R Curtis Bay, Alison R Snyder Valier, Traci Ellery, Kellie C Huxel Bliven
BACKGROUND: Upper extremity (UE) region-specific, patient-reported outcome (PRO) scales assess injuries to the UE but do not account for the demands of overhead throwing athletes or measure patient-oriented domains of health-related quality of life (HRQOL). PURPOSE: To develop the Functional Arm Scale for Throwers (FAST), a UE region-specific and population-specific PRO scale that assesses multiple domains of disablement in throwing athletes with UE injuries. In stage I, a beta version of the scale was developed for subsequent factor identification, final item reduction, and construct validity analysis during stage II...
March 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28396902/progressive-skeletal-benefits-of-physical-activity-when-young-as-assessed-at-the-midshaft-humerus-in-male-baseball-players
#20
S J Warden, A M Weatherholt, A S Gudeman, D C Mitchell, W R Thompson, R K Fuchs
Physical activity benefits the skeleton, but there is contrasting evidence regarding whether benefits differ at different stages of growth. The current study demonstrates that physical activity should be encouraged at the earliest age possible and be continued into early adulthood to gain most skeletal benefits. INTRODUCTION: The current study explored physical activity-induced bone adaptation at different stages of somatic maturity by comparing side-to-side differences in midshaft humerus properties between male throwing athletes and controls...
April 10, 2017: Osteoporosis International
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