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https://www.readbyqxmd.com/read/29332059/analysis-of-skeletal-muscle-performance-using-piezoelectric-film-sensors
#1
Anat Ratnovsky, Emanuel Kusayev, Sara Naftali
A flexible piezoelectric thin film sensor has been proposed recently in several studies for detection of muscle movements. The objective of this study was to investigate the ability of this sensor to assess skeletal muscle performance and fatigue under isokinetic contractions. Simultaneous noninvasive measurements of muscles activity were done using surface electromyography (EMG) electrodes and two thin film piezoelectric sensors. Measurements were taken from the biceps during slow and fast elbow flexion with and without strong grip, during different weight lifting and from the gastrocnemius during treadmill marching at speeds of 4 and of 10 kph...
January 5, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29332031/difference-of-the-thickness-and-activation-of-trunk-muscles-during-static-stoop-lift-at-different-loads-between-subjects-with-and-without-low-back-pain
#2
Hoe-Song Yang
BACKGROUND: Patients suffering from low back pain (LBP) have been reported to alter muscle contraction strategies. OBJECTIVE: To compare activity and thickness of the trunk muscles (external oblique (EO), internal oblique (IO), transversus abdominis (TrA), and lumbar multifidus (LM)) during static stoop lift at different lifting loads between the subjects with and without LBP. METHODS: Twenty eight subjects with LBP and twenty healthy subjects were recruited...
December 29, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29330275/case-of-chest-pain-in-a-young-man
#3
Ankit Gupta, Atul Vijay Palkar, Priya Narwal
A young man with a history of smoking presented with acute-onset chest pain after lifting weights. He also noticed a change in his voice, tightness in his neck and difficulty breathing. A chest radiograph showed soft tissue emphysema in the neck. A CT scan of the chest revealed moderate amount of pneumomediastinum tracking into the neck and down to the diaphragm. He was haemodynamically stable and had no hypoxia or dysphagia. He was monitored for 48 hours and discharged home after resolution of his symptoms...
January 12, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29316189/acute-lumbar-paraspinal-compartment-syndrome-a-systematic-review
#4
REVIEW
William Alexander, Nelson Low, George Pratt
While still a rare entity, acute lumbar paraspinal compartment syndrome has an increasing incidence. Similar to other compartment syndromes, acute lumbar paraspinal compartment syndrome is defined by raised pressure within a closed fibro-osseous space, limiting tissue perfusion within that space. The resultant tissue ischaemia presents as acute pain, and if left untreated, it may result in permanent tissue damage. A literature search of 'paraspinal compartment syndrome' revealed 21 articles. The details from a case encountered by the authors are also included...
January 8, 2018: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29295917/graphene-based-bimorphs-for-micron-sized-autonomous-origami-machines
#5
Marc Z Miskin, Kyle J Dorsey, Baris Bircan, Yimo Han, David A Muller, Paul L McEuen, Itai Cohen
Origami-inspired fabrication presents an attractive platform for miniaturizing machines: thinner layers of folding material lead to smaller devices, provided that key functional aspects, such as conductivity, stiffness, and flexibility, are persevered. Here, we show origami fabrication at its ultimate limit by using 2D atomic membranes as a folding material. As a prototype, we bond graphene sheets to nanometer-thick layers of glass to make ultrathin bimorph actuators that bend to micrometer radii of curvature in response to small strain differentials...
January 2, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29276459/immediate-effect-of-lumbar-mobilization-on-activity-of-erector-spinae-and-lumbar-multifidus-muscles
#6
Fahed Mehyar, Marcio Santos, Sara E Wilson, Vincent S Staggs, Neena K Sharma
Objective: The purpose of this study was to investigate the effect of grade IV lumbar mobilization on the activity/contraction of erector spinae (ES) and lumbar multifidus (LM) muscles in healthy people. Methods: A randomized, repeated-measures design was used. Sixteen healthy subjects attended 3 testing sessions with a different intervention in each session (no intervention, grade IV central lumbar mobilization at L4, and placebo/light touch). Lying in a prone position, subjects lifted a light weight with their right arm while ultrasound images of LM and surface electromyography signals of ES were captured before and immediately after application of the intervention in the session...
December 2017: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/29220323/grasp-performance-of-a-soft-synergy-based-prosthetic-hand-a-pilot-study
#7
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/29210895/characteristics-of-upper-limb-pull-power-and-power-endurance-in-japanese-female-wrestlers
#8
Tatsuki Naka, Masaaki Kanno, Shota Shidochi, Kazuhito Sakae, Norihiro Shima
This study aimed at elucidating the characteristics of upper-limb physical strength required by female wrestlers by comparing the pull power, power endurance, and number of repetitions between female wrestlers at world and national levels. The subjects were 20 female wrestlers (8 Olympic- and/or world-class and 12 national-class top-ranking individuals). The subjects assumed a lying prone (face down) position on a bench and pulled a bar from arms length until contact with underside of bench. The weight load was increased in 10-kg steps and the upper-limb pull power was measured for each lift...
November 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29199789/caffeine-acute-static-stretching-and-maximum-knee-flexion-strength
#9
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/29196908/do-chimpanzees-anticipate-an-object-s-weight-a-field-experiment-on-the-kinematics-of-hammer-lifting-movements-in-the-nut-cracking-ta%C3%A3-chimpanzees
#10
Giulia Sirianni, Roman M Wittig, Paolo Gratton, Roger Mundry, Axel Schüler, Christophe Boesch
When humans are about to manipulate an object, our brains use visual cues to recall an internal representation to predict its weight and scale the lifting force accordingly. Such a long-term force profile, formed through repeated experiences with similar objects, has been proposed to improve manipulative performance. Skillful object manipulation is crucial for many animals, particularly those that rely on tools for foraging. However, despite enduring interest in tool use in non-human animals, there has been very little investigation of their ability to form an expectation about an object's weight...
December 1, 2017: Animal Cognition
https://www.readbyqxmd.com/read/29171976/right-versus-left-side-bridge-static-endurance-ability-among-healthy-collegiate-students-at-taibah-university
#11
Tarek M El-Gohary, Samiha M Abd Elkader, Hatem A Emara, Mahmoud I Ibrahim, Osama A Khaled, Mostafa S Ahmed
BACKGROUND: Spinal muscles endurance is fundamental for providing adequate trunk stability. OBJECTIVE: The purpose of this study was to compare the side bridge static endurance ability of the right versus left side. METHODS: Forty right hand dominant students, aged between 18 and 25 years, were recruited from Taibah University. Every participant had to lie down on his side and bear trunk weight on the arm with shoulder abducted to 90∘ and elbow flexed to 90∘...
November 17, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29171789/accuracy-of-identification-of-low-or-high-risk-lifting-during-standardized-lifting-situations
#12
Mikkel Brandt, Pascal Madeleine, Afshin Samani, Markus Due Jakobsen, Sebastian Skals, Jonas Vinstrup, Lars Louis Andersen
The aim was to classify lifting activities into low and high risk categories (according to The Danish Working Environment Authority guidelines) based on surface electromyography (sEMG) and trunk inclination (tri-axial accelerometer) measurements. Lifting tasks with different weights, horizontal distance and technique were performed. The lifting tasks were characterized by a feature vector composed of either the 90(th), 95(th) or 99(th) percentile of sEMG activity level and trunk inclinations during the task...
November 24, 2017: Ergonomics
https://www.readbyqxmd.com/read/29165697/lifting-and-pregnancy-outcomes-feasibility-of-a-randomized-controlled-trial
#13
E Kwegyir-Afful, J Verbeek, L Aziato, J D Seffah, K Vehviläinen-Julkunen, K Räsänen
Background: The highest incidence of preterm birth (18%) occurs in Africa but the causes are largely unknown. Some studies have reported adverse effects of maternal physical exertion on birth outcomes. A randomized controlled trial (RCT) is proposed to determine the effectiveness of an intervention reducing lifting and carrying in pregnant women in reducing preterm birth and low birthweight. Aims: To test the feasibility and acceptability of the proposed lift-less intervention RCT...
November 19, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/29152451/comparison-of-different-soft-grippers-for-lunch-box-packaging
#14
Zhongkui Wang, Mingzhu Zhu, Sadao Kawamura, Shinichi Hirai
Automating the lunch box packaging is a challenging task due to the high deformability and large individual differences in shape and physical property of food materials. Soft robotic grippers showed potentials to perform such tasks. In this paper, we presented four pneumatic soft actuators made of different materials and different fabrication methods and compared their performances through a series of tests. We found that the actuators fabricated by 3D printing showed better linearity and less individual differences, but showed low durability compared to actuators fabricated by traditional casting process...
2017: Robotics and Biomimetics
https://www.readbyqxmd.com/read/29140148/the-reliability-of-individualized-load-velocity-profiles
#15
Harry G Banyard, K Nosaka, Alex D Vernon, G Gregory Haff
PURPOSE: This study examined the reliability of peak velocity (PV), mean propulsive velocity (MPV), and mean velocity (MV) in the development of load-velocity profiles (LVP) in the full depth free-weight back squat performed with maximal concentric effort. METHODS: Eighteen resistance-trained men performed a baseline one-repetition maximum (1RM) back squat trial and three subsequent 1RM trials used for reliability analyses, with 48-hours interval between trials...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29135892/-lower-body-lift-in-the-massive-weight-loss-patient-a-new-classification-and-algorithm-for-gluteal-augmentation
#16
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/29135818/trends-of-magnet-ingestion-in-children-an-ironic-attraction
#17
Patrick Todd Reeves, Cade M Nylund, Jayasree Krishnamurthy, R Adam Noel, Mazen I Abbas
BACKGROUND AND OBJECTIVES: Ingestion of rare earth magnets is a serious ongoing hazard for pediatric patients. Our study aims to investigate whether 2012 Consumer Product Safety Commission (CPSC) policy action, in coordination with efforts from consumer and physician advocacy groups, decreased the incidence of magnet ingestions in children in US since 2012. METHODS: Data from the National Electronic Injury Surveillance System (NEISS) was used to evaluate trends in emergency department (ED) encounters with pediatric patients (<18 years) who presented with suspected magnet ingestions (SMI) from 2010-2015...
November 11, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29129587/thighplasty-improving-aesthetics-through-revival-of-the-medial-horizontal-procedure-a-safe-and-scar-saving-option
#18
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/29122201/factors-determining-workers-pace-while-conducting-continuous-sequential-lifting-carrying-and-lowering-tasks
#19
Yaar Harari, Raziel Riemer, Avital Bechar
To plan a new manual material handling work process, it is necessary to predict the times required to complete each task. Current time prediction models lack validity when the handled object's mass exceeds 2 kg. In this study, we investigated the effect of workplace design parameters on continuous sequential lifting, carrying, and lowering of boxes weighing from 2 kg to 14 kg. Both laboratory and field experiments were conducted. Results revealed that the box's weight and the lifting and lowering heights influenced the tasks' times...
February 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29112055/self-selected-resistance-exercise-load-implications-for-research-and-prescription
#20
Sebastião Barbosa-Netto, Obanshe S dʼAcelino-E-Porto, Marcos B Almeida
Barbosa-Netto, S, d'Acelino-e-Porto, OS, and Almeida, MB. Self-selected resistance exercise load: implications for research and prescription. J Strength Cond Res XX(X): 000-000, 2017-Resistance training has been widely used for maintaining or improving the quality of life and sports performance. It is not clear, however, whether the load commonly used in these exercises is equivalent to the number of repetitions determined for execution, that is, the level of effort applied to the self-selected load. Ergo, the aim of this study was to identify the number of maximum repetitions that strength training practitioners can perform with the load commonly used (self-selected) to perform 10 repetitions in their training routines...
November 1, 2017: Journal of Strength and Conditioning Research
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