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https://www.readbyqxmd.com/read/28641241/influence-of-shoulder-kinematic-estimate-on-joint-and-muscle-mechanics-predicted-by-musculoskeletal-model
#1
Yoann Blache, Mickael Begon
Little information is available in the existing literature regarding the influence of the scapular kinematic estimate method on musculoskeletal analysis. This study aimed to assess the propagation of errors due to the method used for scapular kinematics reconstruction in the workflow of musculoskeletal modeling (joint kinematics, joint torques, muscle force and joint reaction force) in shoulder and upper-limb movements. Two participants performed functional (arm elevation and rotation), daily life (eating and reaching pants pockets) and sports movements (a simulated throwing maneuver)...
June 15, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28636498/a-novel-clinical-simulated-suture-education-for-basic-surgical-skill-suture-on-the-biological-tissue-fixed-on-standardized-patient-evaluated-with-objective-structured-assessment-of-technical-skill-osats-tools
#2
Zhanlong Shen, Fan Yang, Pengji Gao, Li Zeng, Guanchao Jiang, Shan Wang, Yingjiang Ye, Fengxue Zhu
BACKGROUND: Clinical-simulated training has shown benefit in the education of medical students. However, the role of clinical simulation for surgical basic skill training such as suturing techniques remains unclear. MATERIALS AND METHODS: Forty-two medical students were asked to perform specific suturing tasks at three stations with the different settings within four minutes (Station 1: Synthetic suture pad fixed on the bench, Station 2: Synthetic suture pad fixed on the standardized patient, Station 3: Pig skin fixed on the standardized patient); the OSATS (Objective Structured Assessment of Technical Skill) tool was used to evaluate the performance of students...
June 21, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28633608/biomechanics-of-increased-spin-velocity-of-flying-discs-during-forehand-throws-by-skilled-and-unskilled-throwers
#3
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/28632685/-don-t-throw-the-baby-out-with-the-bath-water-a-reply-to-dr-onwochei-et-al
#4
Catherine Vandepitte, Max Kuroda, Sam van Boxstael, Admir Hadzic
No abstract text is available yet for this article.
July 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28632065/muscle-activation-sequencing-of-leg-muscles-during-linear-glide-shot-putting
#5
Róisín M Howard, Richard Conway, Andrew J Harrison
In the shot put, the athlete's muscles are responsible for generating the impulses to move the athlete and project the shot into the air. Information on phasic muscle activity is lacking for the glide shot put event and therefore important technical information for coaches is not currently available. This study provides an electromyography (EMG) analysis of the muscle activity of the legs during shot put. Fifteen right-handed Irish national level shot putters performed six maximum effort throws using the glide shot put technique...
March 1, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632056/reliability-of-power-and-velocity-variables-collected-during-the-traditional-and-ballistic-bench-press-exercise
#6
Amador García-Ramos, G Gregory Haff, Paulino Padial, Belén Feriche
This study aimed to examine the reliability of different power and velocity variables during the Smith machine bench press (BP) and bench press throw (BPT) exercises. Twenty-two healthy men conducted four testing sessions after a preliminary BP one-repetition maximum (1RM) test. In a counterbalanced order, participants performed two sessions of BP in one week and two sessions of BPT in another week. Mean propulsive power, peak power, mean propulsive velocity, and peak velocity at each tenth percentile (20-70% of 1RM) were recorded by a linear transducer...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632054/middle-finger-and-ball-movements-around-ball-release-during-baseball-fastball-pitching
#7
Tomoyuki Matsuo, Tsutomu Jinji, Daisaku Hirayama, Daiki Nasu, Hiroki Ozaki, Daisuke Kumagawa
The objectives of this study were to investigate middle finger movements and dynamics of ball movements around the instant of ball release during baseball pitching. Baseball pitching from an indoor mound among 14 semi-professional pitchers was captured using a motion capture system with 16 high-speed cameras (1,000 Hz). Kinematics of middle finger joints, ball rotation, and force applied to the ball were calculated. The proximal and distal interphalangeal joints continued to extend until the instant of ball release, then abruptly flexed...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632049/kinematic-comparison-of-the-seoi-nage-judo-technique-between-elite-and-college-athletes
#8
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/28628849/kinematic-patterns-underlying-disguised-movements-spatial-and-temporal-dissimilarity-compared-to-genuine-movement-patterns
#9
Fabian Helm, Jörn Munzert, Nikolaus F Troje
This study examined the kinematic characteristics of disguised movements by applying linear discriminant (LDA) and dissimilarity analyses to the motion data from 788 disguised and 792 non-disguised 7-m penalty throws performed by novice and expert handball field players. Results of the LDA showed that discrimination between type of throws (disguised vs. non-disguised) was more error-prone when throws were performed by experts (spatial: 4.6%; temporal: 29.6%) compared to novices (spatial: 1.0%; temporal: 20...
June 16, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28628245/effects-of-resistance-training-using-known-vs-unknown-loads-on-eccentric-phase-adaptations-and-concentric-velocity
#10
Jose Luis Hernández-Davó, Rafael Sabido, David G Behm, Anthony J Blazevich
The aims of this study were to compare both eccentric- and concentric-phase adaptations in highly-trained handball players to 4 weeks of twice-weekly rebound bench press throw training with varying loads (30%, 50% and 70% of 1-repetition maximum [1-RM]) using either known (KL) or unknown (UL) loads, and to examine the relationship between changes in eccentric- and concentric-phase performance. Twenty-eight junior team-handball players were divided into two experimental groups (KL or UL) and a control group...
June 19, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28627908/first-evidence-for-the-backup-plan-paradox
#11
Christopher M Napolitano, Alexandra M Freund
This research is a first test of the backup plan paradox. We hypothesized that investing in a backup plan may facilitate the conditions that it was developed to address: Plan A's insufficiency. Five studies provide initial, primarily correlative support for the undermining effect of investing in a backup plan. Study 1 (n= 160) demonstrated that the more participants perceived they had invested in developing a backup plan (preparing a "crib sheet"), the more likely they were to use it, although greater investments were unrelated to backup plan utility...
June 19, 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28620982/novice-students-navigating-the-clinical-environment-in-an-early-medical-clerkship
#12
Jenny Barrett, Steve C Trumble, Geoff McColl
CONTEXT: The black box that is student learning in clinical environments is an ongoing research project. Our previous research showed that despite the time that students are given to learn with, about and from patients, some lack confidence for those encounters and see few patients. The study reported here investigated individual and environmental factors affecting medical students' self-directed learning time in hospital. METHODS: We studied second year students in the four-year postgraduate Melbourne Medical School programme as they undertook the first of their four 9-week hospital placements in medical wards...
June 16, 2017: Medical Education
https://www.readbyqxmd.com/read/28619447/similar-movements-are-associated-with-drastically-different-muscle-contraction-velocities
#13
Daniel A Hagen, Francisco J Valero-Cuevas
We investigated how kinematic redundancy interacts with the neurophysiological control mechanisms required for smooth and accurate, rapid limb movements. Biomechanically speaking, tendon excursions are over-determined because the rotation of few joints determines the lengths and velocities of many muscles. But how different are the muscle velocity profiles induced by various, equally valid hand trajectories? We used an 18-muscle sagittal-plane arm model to calculate 100,000 feasible shoulder, elbow, and wrist joint rotations that produced valid basketball free throws with different hand trajectories, but identical initial and final hand positions and velocities...
May 31, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28611709/relationships-between-motor-and-executive-functions-and-the-effect-of-an-acute-coordinative-intervention-on-executive-functions-in-kindergartners
#14
Marion Stein, Max Auerswald, Mirjam Ebersbach
There is growing evidence indicating positive, causal effects of acute physical activity on cognitive performance of school children, adolescents, and adults. However, only a few studies examined these effects in kindergartners, even though correlational studies suggest moderate relationships between motor and cognitive functions in this age group. One aim of the present study was to examine the correlational relationships between motor and executive functions among 5- to 6-year-olds. Another aim was to test whether an acute coordinative intervention, which was adapted to the individual motor functions of the children, causally affected different executive functions (i...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28607764/chronic-medial-instability-of-the-elbow
#15
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/28605995/dna-trinucleotide-gaa-repeats-in-human-genome-hint-for-disease-pathogenesis
#16
Himanshu Narayan Singh, Barbara Scheiber-Mojdehkar, Moganty R Rajeswari
Short DNA triplet repeats are generally considered to 'benign' in nature, however, it can lead to abnormal genetic features by inducing hyper expansion including mutational hotspots, unusual DNA structure etc. Thus, the expanded DNA base triplets in human genome are expected to play crucial role in disease pathogenesis. One such triplet repeat expansion of (GAA) is observed in FXN gene which is well established to cause neurological disease "Friedreich's ataxia". To explore the association of repeats in other genes if any, we performed a systematic search in the entire human genome...
June 12, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28604654/postural-control-in-elite-decathlon-athletes-are-various-modes-of-dynamic-assessment-needed
#17
Sven Reuter, Philipp Forkel, Andreas B Imhoff, Knut Beitzel
BACKGROUND: Decathlon consists of various track and field running, jumping and throwing events. This results in high physical demands and poor postural control may predispose athletes at a higher risk for injury. The purpose of this study was to measure and to show a relationship of different dynamic postural control tests in healthy professional decathlon athletes. METHODS: The German top decathlon team (eight professional athletes, mean age±standard deviation (SD), 20...
July 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28596318/circular-dna-throws-biologists-for-a-loop
#18
Elizabeth Pennisi
No abstract text is available yet for this article.
June 9, 2017: Science
https://www.readbyqxmd.com/read/28595399/modeling-the-nonlinear-dielectric-response-of-glass-formers
#19
U Buchenau
The recently developed pragmatical model of asymmetric double-well potentials with a finite lifetime is applied to nonlinear dielectric data in polar undercooled liquids. The viscous effects from the finite lifetime provide a crossover from the cooperative jumps of many molecules at short times to the motion of statistically independent molecules at long times. The model allows us to determine the size of cooperatively rearranging regions from nonlinear ω-data and throws new light on a known inconsistency between nonlinear ω and 3ω-signals for glycerol and propylene carbonate...
June 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28588362/folic-acid-modulates-matrix-metalloproteinase-2-expression-alleviates-neuropathic-pain-and-improves-functional-recovery-in-spinal-cord-injured-rats
#20
Gurwattan S Miranpuri, Sivan Vadakkadath Meethal, Emmanuel Sampene, Abhishek Chopra, Seah Buttar, Carrie Nacht, Neydis Moreno, Kush Patel, Lisa Liu, Anupama Singh, Chandra K Singh, Nithya Hariharan, Bermans Iskandar, Daniel K Resnick
BACKGROUND: The molecular underpinnings of spinal cord injury (SCI) associated with neuropathic pain (NP) are unknown. Recent studies have demonstrated that matrix metalloproteinases (MMPs) such as MMP2 play a critical role in inducing NP following SCI. Promoter methylation of MMPs is known to suppress their transcription and reduce NP. In this context, it has been shown in rodents that folic acid (FA), an FDA approved dietary supplement and key methyl donor in the central nervous system (CNS), increases axonal regeneration and repair of injured CNS in part via methylation...
May 2017: Annals of Neurosciences
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