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https://www.readbyqxmd.com/read/29221901/role-of-heel-lifting-in-standing-balance-recovery-a-simulation-study
#1
Kuangyou B Cheng, Hiroko Tanabe, Wen-Chien Chen, Hung-Ta Chiu
Although lifting the heels has frequently been observed during balance recovery, the function of this movement has generally been overlooked. The present study aimed to investigate the functional role of heel lifting during regaining balance from a perturbed state. Computer simulation was employed to objectively examine the effect of allowing/constraining heel lifting on balance performance. The human model consisted of 3 rigid body segments connected by frictionless joints. Movements were driven by joint torques depending on current joint angle, angular velocity, and activation level...
December 2, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29220323/grasp-performance-of-a-soft-synergy-based-prosthetic-hand-a-pilot-study
#2
Alycia S Gailey, Sasha Blue Godfrey, Ryan E Breighner, Karen L Andrews, Kristin D Zhao, Antonio Bicchi, Marco Santello
Current prosthetic hands are frequently rejected in part due to limited functionality and versatility. We assessed the feasibility of a novel prosthetic hand, the SoftHand Pro (SHP), whose design combines soft robotics and hand postural synergies. Able-bodied subjects ( ) tracked cursor motion by opening and closing the SHP and performed a grasp-lift-hold-release (GLHR) task with a sensorized cylindrical object of variable weight. The SHP control was driven by electromyographic (EMG) signals from two antagonistic muscles...
December 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29216446/comparison-of-two-equated-resistance-training-weekly-volume-routines-using-different-frequencies-on-body-composition-and-performance-in-trained-males
#3
Yue Fu, Bettina Karsten, Eneko Larumbe-Zabala, Marcos Seijo, Fernando Naclerio
The present study compared the effects of two weekly-equalized volume and relative load interventions on body composition, strength and power. Based on individual baseline maximal strength values, eighteen recreationally trained men were pair-matched and consequently randomly assigned to one of the following experimental groups: a low volume per session with a high frequency (LV-HF, n = 9) group who trained 4-days (Mondays, Tuesdays, Thursdays and Fridays) or a high volume per session and low frequency (HV-LF, n = 9) group who trained 2-days (Mondays and Thursdays)...
December 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29199789/caffeine-acute-static-stretching-and-maximum-knee-flexion-strength
#4
Tyler M Farney, Arnold G Nelson, Joke Kokkonen
BACKGROUND: Reductions in one repetition maximum lifts (1RM) following static stretching can be attributed to enhanced neural inhibition, which can be reduced by using stimulants like caffeine. This study compared knee-flexion 1RM following either static stretching (SS) or no-stretching (NS), as well as after ingesting either caffeine (C) or placebo (P). METHODS: Twenty-four participants (12 female, 12 male) performed four random counterbalanced knee flexion 1RM tests...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29194167/critical-care-nurses-pain-experiences-and-the-prognostic-factors
#5
Sevim Çelik, Nurten Taşdemir, Ayşe Öksüzoğlu, Elif Dirimeşe, Sema Koçaşli
OBJECTIVE: The objective of this study was to determine the emergence of pain in critical-care nurses and the prognostic risk factors. DESIGN: This study is a cross-sectional descriptive research. SETTING AND SUBJECTS: This study was conducted with the participation of 111 critical-care nurses in Zonguldak province, Turkey. INTERVENTIONS: The data were collected using a survey form and the Cornell Musculoskeletal Discomfort Questionnaire between August and November 2015...
January 2018: Dimensions of Critical Care Nursing: DCCN
https://www.readbyqxmd.com/read/29187618/control-surfaces-of-aquatic-vertebrates-active-and-passive-design-and-function
#6
REVIEW
Frank E Fish, George V Lauder
Aquatic vertebrates display a variety of control surfaces that are used for propulsion, stabilization, trim and maneuvering. Control surfaces include paired and median fins in fishes, and flippers and flukes in secondarily aquatic tetrapods. These structures initially evolved from embryonic fin folds in fishes and have been modified into complex control surfaces in derived aquatic tetrapods. Control surfaces function both actively and passively to produce torque about the center of mass by the generation of either lift or drag, or both, and thus produce vector forces to effect rectilinear locomotion, trim control and maneuvers...
December 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29183568/vertical-head-and-pelvic-movement-symmetry-at-the-trot-in-dogs-with-induced-supporting-limb-lameness
#7
C B Gómez Álvarez, P Gustås, A Bergh, M Rhodin
Compensatory limb loading has been studied in lame dogs; however, little is known about how these compensations relate to motion of the head and pelvis, assessment of which is an important component of lameness examinations. The aim of this study was to describe the patterns of vertical head and pelvic motion symmetry at the trot in dogs with induced supporting limb lameness in the forelimbs or hind limbs. Ten sound dogs were trotted on a treadmill before and after temporary induction of moderate lameness (grade 2/5) in each limb...
November 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29180429/kinematics-of-flagellar-swimming-in-euglena-gracilis-helical-trajectories-and-flagellar-shapes
#8
Massimiliano Rossi, Giancarlo Cicconofri, Alfred Beran, Giovanni Noselli, Antonio DeSimone
The flagellar swimming of euglenids, which are propelled by a single anterior flagellum, is characterized by a generalized helical motion. The 3D nature of this swimming motion, which lacks some of the symmetries enjoyed by more common model systems, and the complex flagellar beating shapes that power it make its quantitative description challenging. In this work, we provide a quantitative, 3D, highly resolved reconstruction of the swimming trajectories and flagellar shapes of specimens of Euglena gracilis We achieved this task by using high-speed 2D image recordings taken with a conventional inverted microscope combined with a precise characterization of the helical motion of the cell body to lift the 2D data to 3D trajectories...
November 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29170701/a-pre-exercise-dose-of-muscle-sentry%C3%A2-has-no-effect-on-performing-repeated-leg-press-sets-to-failure
#9
Trezlyn M Bartschi, David C Sanders, Tyler M Farney, Joke Kokkonen, Arnold G Nelson
This study compared the number of bilateral leg presses done at 150% of body mass while on either Muscle Sentry® (MS) or placebo (PL). Participants (16 women, 14 men, college students 19-26 years) performed 2 sets of leg press to failure using 150% of their body mass with 5 min rest separating the 2 sets. Each exercise was performed twice (1× MS, 1× PL) at the same time of day with 48 h separating each exercise. Both MS and PL were ingested 30 min prior to performing the exercise. Just prior to starting the exercise and at the end of each set, heart rate, and blood pressure were obtained and the rate pressure product was calculated to determine myocardial workload...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29158895/a-journey-through-liposuction-and-liposculture-review
#10
REVIEW
Elisa Bellini, Michele P Grieco, Edoardo Raposio
Introduction: Nowadays, liposuction is the most frequently performed aesthetic surgery procedure in Western Countries. This technique has had rapid development since the 1970s, when it was experimented for the first time by A. and G. Fischer. It is currently widely used in clinical practice for many different situations in aesthetic, reconstructive and functional fields. Materials and methods: This review aims to describe the historical evolution of liposuction by analyzing the transformation of the method in function of the introduction of innovative ideas or instruments...
December 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/29157658/continuous-ambulatory-hand-force-monitoring-during-manual-materials-handling-using-instrumented-force-shoes-and-an-inertial-motion-capture-suit
#11
G S Faber, A S Koopman, I Kingma, C C Chang, J T Dennerlein, J H van Dieën
Hand forces (HFs) are commonly measured during biomechanical assessment of manual materials handling; however, it is often a challenge to directly measure HFs in field studies. Therefore, in a previous study we proposed a HF estimation method based on ground reaction forces (GRFs) and body segment accelerations and tested it with laboratory equipment: GFRs were measured with force plates (FPs) and segment accelerations were measured using optical motion capture (OMC). In the current study, we evaluated the HF estimation method based on an ambulatory measurement system, consisting of inertial motion capture (IMC) and instrumented force shoes (FSs)...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29135892/-lower-body-lift-in-the-massive-weight-loss-patient-a-new-classification-and-algorithm-for-gluteal-augmentation
#12
Taliah Schmitt, Samer Jabbour, Rani Makhoul, Warren Noel, Anne-Sophie Reguesse, Philippe Levan
BACKGROUND: An often neglected part of the lower body lift procedure is the gluteal region. The objective of this study is to classify the massive weight loss (MWL) patients undergoing a body lift procedure and provide a safe, standardized approach for gluteal augmentation. METHODS: A retrospective review of all body lift procedures performed between January 2012 and January 2017 was conducted. Patients undergoing a lower body lift with or without gluteal augmentation were included for analysis...
November 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29133982/combined-aesthetic-interventions-for-prevention-of-facial-ageing-and-restoration-and-beautification-of-face-and-body
#13
Sabrina Fabi, Tatjana Pavicic, André Braz, Jeremy B Green, Kyle Seo, Jani Aj van Loghem
The Merz Institute of Advanced Aesthetics Expert Summit was held in Prague, Czech Republic, from 19-20 November 2016. The meeting had a distinct advisory board character and invited aesthetic practitioners from all over the world to hear an international faculty present a range of keynote lectures and conduct live injection sessions with an emphasis on recent developments in combination aesthetic interventions for face and body rejuvenation and beautification. Aging is associated with changes in bones, muscles, ligaments, adipose tissue, and skin and, moreover, involves interactions among these tissue types...
2017: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/29129587/thighplasty-improving-aesthetics-through-revival-of-the-medial-horizontal-procedure-a-safe-and-scar-saving-option
#14
Karl Schwaiger, Elisabeth Russe, Klemens Heinrich, Florian Ensat, Gernot Steiner, Gottfried Wechselberger, Michaela Hladik
INTRODUCTION: Thighplasty is a common bodycontouring procedure, but also associated with a high complication rate. The purpose of this study was to access the outcome of the medial horizontal thigh lift as it is a common surgical technique regarding thigh deformity correction performed at the authors' department. Surgical keysteps, clinical applications, advantages and disadvantages of the procedure are shown. Postoperative evaluation took place with special focus on individual patient satisfaction...
October 25, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29129132/reliability-of-force-velocity-relationships-during-deadlift-high-pull
#15
Wei Lu, Sébastien Boyas, Marc Jubeau, Abderrahmane Rahmani
This study aimed to evaluate the within- and between-session reliability of force, velocity and power performances and to assess the force-velocity relationship during the deadlift high pull (DHP). Nine participants performed two identical sessions of DHP with loads ranging from 30 to 70% of body mass. The force was measured by a force plate under the participants' feet. The velocity of the 'body + lifted mass' system was calculated by integrating the acceleration and the power was calculated as the product of force and velocity...
November 13, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29107836/using-verbal-instructions-to-influence-lifting-mechanics-does-the-directive-lift-with-your-legs-not-your-back-attenuate-spinal-flexion
#16
Tyson A C Beach, Tatjana Stankovic, Danielle R Carnegie, Rachel Micay, David M Frost
"Use your legs" is commonly perceived as sound advice to prevent lifting-related low-back pain and injuries, but there is limited evidence that this directive attenuates the concomitant biomechanical risk factors. Body segment kinematic data were collected from 12 men and 12 women who performed a laboratory lifting/lowering task after being provided with different verbal instructions. The main finding was that instructing participants to lift "without rounding your lower back" had a greater effect on the amount of spine flexion they exhibited when lifting/lowering than instructing them to lift "with your legs instead of your back" and "bend your knees and hips"...
October 31, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29097902/using-a-bayesian-network-to-predict-l5-s1-spinal-compression-force-from-posture-hand-load-anthropometry-and-disc-injury-status
#17
Richard E Hughes
Stochastic biomechanical modeling has become a useful tool most commonly implemented using Monte Carlo simulation, advanced mean value theorem, or Markov chain modeling. Bayesian networks are a novel method for probabilistic modeling in artificial intelligence, risk modeling, and machine learning. The purpose of this study was to evaluate the suitability of Bayesian networks for biomechanical modeling using a static biomechanical model of spinal forces during lifting. A 20-node Bayesian network model was used to implement a well-established static two-dimensional biomechanical model for predicting L5/S1 compression and shear forces...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29091924/the-aerodynamics-of-flight-in-an-insect-flight-mill
#18
Gal Ribak, Shay Barkan, Victoria Soroker
Predicting the dispersal of pest insects is important for pest management schemes. Flight-mills provide a simple way to evaluate the flight potential of insects, but there are several complications in relating tethered-flight to natural flight. We used high-speed video to evaluate the effect of flight-mill design on flight of the red palm weevil (Rynchophorous ferruginneus) in four variants of a flight-mill. Two variants had the rotating radial arm pivoted on the main shaft of the rotation axis, allowing freedom to elevate the arm as the insect applied lift force...
2017: PloS One
https://www.readbyqxmd.com/read/29091835/biomarker-and-histopathological-responses-of-lates-calcarifer-on-exposure-to-sub-lethal-concentrations-of-chlorpyrifos
#19
S R Marigoudar, D Mohan, A Nagarjuna, P Karthikeyan
Bioassay tests on fingerlings (3.0 ± 0.5cm) of euryhyaline fish Lates calcarifer were conducted using customized continuous flow through system and derived 96h acute toxicity value for chlorpyrifos (CPF). Based on the measured concentration of CPF mean median lethal concentration (LC50) of 1.07µg/l with lower and upper 95% confidence limits (0.95 and 1.19µg/l). No observed Effect Concentration (NOEC), Lowest Observed Effect Concentration (LOEC) and chronic values were found to be 0.4, 0.09 and 0.07µg/l respectively...
October 29, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29073208/pendular-energy-transduction-within-the-step-during-human-walking-on-slopes-at-different-speeds
#20
Arthur H Dewolf, Yuri P Ivanenko, Francesco Lacquaniti, Patrick A Willems
When ascending (descending) a slope, positive (negative) work must be performed to overcome changes in gravitational potential energy at the center of body mass (COM). This modifies the pendulum-like behavior of walking. The aim of this study is to analyze how energy exchange and mechanical work done vary within a step across slopes and speeds. Ten subjects walked on an instrumented treadmill at different slopes (from -9° to 9°), and speeds (between 0.56 and 2.22 m s-1). From the ground reaction forces, we evaluated energy of the COM, recovery (i...
2017: PloS One
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