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https://www.readbyqxmd.com/read/29163094/where-are-you-throwing-the-ball-i-better-watch-your-body-not-just-your-arm
#1
Antonella Maselli, Aishwar Dhawan, Benedetta Cesqui, Marta Russo, Francesco Lacquaniti, Andrea d'Avella
The ability to intercept or avoid a moving object, whether to catch a ball, snatch one's prey, or avoid the path of a predator, is a skill that has been acquired throughout evolution by many species in the animal kingdom. This requires processing early visual cues in order to program anticipatory motor responses tuned to the forthcoming event. Here, we explore the nature of the early kinematics cues that could inform an observer about the future direction of a ball projected with an unconstrained overarm throw...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29146510/relative-contributions-of-the-midcarpal-and-radiocarpal-joints-to-dart-thrower-s-motion-at-the-wrist
#2
Patrick M Kane, Bryan G Vopat, P Kaveh Mansuripur, Michael P Gaspar, Scott W Wolfe, Joseph J Crisco, Christopher Got
PURPOSE: To identify the relative contributions of the radiocarpal (RC) and midcarpal (MC) joints to dart-thrower's motion (DTM) of the wrist. METHODS: Six cadaveric upper extremities were fixed to a custom-designed loading jig allowing for pure moment-rotation analysis in 24 different directions of wrist motion. Each specimen was tested in 3 states: intact, simulated radiocarpal fusion (sRCF) and simulated pancarpal fusion (sPCF). Moments of ± 1.5 Nm were applied at each of 24 directions for each state and the resulting wrist rotation recorded...
November 14, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29135636/track-and-field-throwing-sports-injuries-and-prevention
#3
Adele Meron, Deborah Saint-Phard
Throwing events in track and field are among the oldest sporting events in recorded history and include shot put, discus, hammer, and javelin. All throwing athletes use the kinetic chain to transfer energy from the lower extremities, through the pelvis, trunk, shoulder, arm, wrist, hand, and finally into the implement to generate maximum force. Throughout this sequential activation, mobilization, and stabilization of body segments, there is opportunity for breakdown in the chain, which can lead to injury. This review describes the biomechanics and kinetic chain components of each event and highlights injuries common among all throwers as well as injuries unique to each event...
November 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29134994/gas-adsorption-efficacy-of-graphene-sheets-functionalised-with-carboxyl-hydroxyl-and-epoxy-groups-in-conjunction-with-stone-thrower-wales-stw-and-inverse-stone-thrower-wales-istw-defects
#4
Murugan Lalitha, Senthilkumar Lakshmipathi
The complete reduction of graphene oxide is difficult to achieve, and hence oxygen-containing functional groups do exist in graphene, along with structural defects. On the other hand, efficient gas sensor materials have been a subject of relentless interest. This instigates the need to explore the gas adsorption on STW and ISTW defective graphene sheets functionalised by -COOH, -OH and C-O-C groups, using density functional theory calculations. Both defects are experimentally feasible as evident through their formation energies...
November 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29098617/effects-of-exercise-on-arrhythmia-and-viceversa-lesson-from-the-greek-mythology
#5
Caterina Lambiase, Silvia Macerola, Giovanna Bosco, Elisa Messina, Pasquale Franciosa
Exercise represents an important lifestyle factor in all human ages when felt in harmony with other psycho-physical and environmental variables that affect individual life (e. g. quality of interest, affections, environment, diet and food). Consequently, in addition to the training level, the amount, intensity and modality of exercise (ana-/aerobic, isometric/isotonic), need to be personalized, considering the underlying diseases, which may benefit from it or worsening.Greek mythology gives us good examples of the exercise concept's evolution...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29095397/correlation-of-mri-to-arthroscopy-in-the-elbow-thrower-s-elbow-and-ulnar-collateral-ligament-injury
#6
Michael C Ciccotti, Justin D Stull, Patrick S Buckley, Steven B Cohen
One cannot overstate the importance of a thorough history and physical examination, supplemented with directed imaging, to help pinpoint the exact cause of the athlete's elbow pain. Although plain radiographs should not be overlooked, advanced imaging plays a critical role in diagnosis and management of pathology in the thrower's elbow, including computed tomography, magnetic resonance imaging, and stress ultrasound. By judiciously combining these elements, the clinician can appropriately manage these injuries in order to successfully return the athlete to their preinjury level of play...
December 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/29090988/youth-baseball-pitching-mechanics-a-systematic-review
#7
Samuel F Thompson, Trent M Guess, Andreas C Plackis, Seth L Sherman, Aaron D Gray
CONTEXT: Pitching injuries in youth baseball are increasing in incidence. Poor pitching mechanics in young throwers have not been sufficiently evaluated due to the lack of a basic biomechanical understanding of the "normal" youth pitching motion. OBJECTIVE: To provide a greater understanding of the kinetics and kinematics of the youth baseball pitching motion. DATA SOURCES: PubMed, MEDLINE, and SPORTDiscus databases were searched from database inception through February 2017...
November 1, 2017: Sports Health
https://www.readbyqxmd.com/read/29047173/motivational-orientations-and-performance-in-penalty-throws-during-elite-male-team-handball-games
#8
Thierry Debanne, Guillaume Laffaye, David Trouilloud
The present study is based on Regulatory Focus Theory and investigates the links between the subjects' motivational orientations for promotion or prevention and their performance in handball penalty throws. In a real-world setting with high stakes, we analysed 327 penalties taken from 68 closed games. The results of the 7-metre throws constitute the dependent variable (Goal vs. Miss). The independent variables are the situational focus ([critical moment (i.e., final minute) = pressure] vs. [non-critical moment = no pressure]), the reward structure (i...
October 19, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28932488/medial-elbow-pain
#9
REVIEW
Raul Barco, Samuel A Antuña
Medial elbow pain is uncommon when compared with lateral elbow pain.Medial epicondylitis is an uncommon diagnosis and can be confused with other sources of pain.Overhead throwers and workers lifting heavy objects are at increased risk of medial elbow pain.Differential diagnosis includes ulnar nerve disorders, cervical radiculopathy, injured ulnar collateral ligament, altered distal triceps anatomy or joint disorders.Children with medial elbow pain have to be assessed for 'Little League elbow' and fractures of the medial epicondyle following a traumatic event...
August 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28911905/gaussian-process-classification-of-superparamagnetic-relaxometry-data-phantom-study
#10
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...
October 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
#11
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
#12
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, 23 cystic mesothelioma were reviewed. Imaging findings were correlated with surgical outcome...
November 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
#13
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...
November 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28742607/pitch-counts-in-youth-baseball-and-softball-a-historical-review
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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