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https://www.readbyqxmd.com/read/28813913/emu-a-transparent-3d-robotic-manipulandum-for-upper-limb-rehabilitation
#1
Justin Fong, Vincent Crocher, Ying Tan, Denny Oetomo, Iven Mareels
This paper introduces the EMU, a three-dimensional robotic manipulandum for rehabilitation of the upper extremity for patients with neurological injury. The device has been designed to be highly transparent, have a large workspace, and allow the use of the hand for interaction with real-world objects to provide additional contextual cues during exercises. The transparency is achieved through the use of a capstan transmission for the drive joints; a hybrid serial parallel kinematics minimising moving inertia; and lightweight materials...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813911/design-and-kinematic-analysis-of-a-novel-upper-limb-exoskeleton-for-rehabilitation-of-stroke-patients
#2
Amin Zeiaee, Rana Soltani-Zarrin, Reza Langari, Reza Tafreshi
This paper details the design process and features of a novel upper limb rehabilitation exoskeleton named CLEVER (Compact, Low-weight, Ergonomic, Virtual/Augmented Reality Enhanced Rehabilitation) ARM. The research effort is focused on designing a lightweight and ergonomic upper-limb rehabilitation exoskeleton capable of producing diverse and perceptually rich training scenarios. To this end, the knowledge available in the literature of rehabilitation robotics is used along with formal conceptual design techniques...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28759540/a-comparison-of-the-technique-of-the-football-quarterback-pass-between-high-school-and-university-athletes
#3
Adam Toffan, Marion J L Alexander, Jason Peeler
The purpose of the study was to compare the most effective joint movements, segment velocities and body positions to perform the fastest and most accurate pass of high school and university football quarterbacks. Secondary purposes were to develop a quarterback throwing test to assess skill level, to determine which kinematic variables were different between high school and university athletes as well as to determine which variables were significant predictors of quarterback throwing test performance. Ten high school and ten university athletes were filmed for the study, performing nine passes at a target and two passes for maximum distance...
July 28, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28756509/glenohumeral-and-scapulohumeral-kinematic-analysis-of-patients-with-traumatic-anterior-instability-wearing-a-shoulder-brace-a-prospective-laboratory-study
#4
F Dellabiancia, I Parel, M V Filippi, G Porcellini, G Merolla
PURPOSE: To assess the effectiveness of a novel glenohumeral joint immobilizer, the S2 Shoulder Stabilizer(®), by evaluating shoulder kinematics with a stereophotogrammetry system. METHODS: Participants in this prospective laboratory study were recruited from patients with anterior traumatic instability awaiting arthroscopic glenohumeral stabilization. Glenohumeral and scapulohumeral kinematic data (arm abduction-adduction and internal-external rotation, and scapular pronation-retraction and mediolateral rotation) were collected twice, without and with the brace, using a VICON™ motion capture system, and processed with MATLAB(®) software...
July 29, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28753120/dynamic-analysis-of-forces-in-the-lumbar-spine-during-bag-carrying
#5
Lessby Gómez, Carlos A Díaz, Gustavo A Orozco, José J García
PURPOSE: The intervertebral disc supports axial and shear forces generated during tasks such as lifting and carrying weights. The objective of this study was to determine the forces in the lumbar spine of workers carrying a bag on the head, on the shoulder, and on the anterior part of the trunk. MATERIALS AND METHODS: Kinematic measurements were recorded of 10 subjects carrying bags of 10, 20 and 25 kg on each of the three aforementioned positions. Then, a simple dynamic model implemented in a custom program was developed to determine the lumbar forces using the accelerations and positions obtained from the kinematic analysis...
July 28, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28749751/the-relationship-between-segmental-kinematics-and-ball-spin-in-type-2-cricket-spin-bowling
#6
Aaron J Beach, René E D Ferdinands, Peter J Sinclair
The techniques of spin bowling in cricket have been largely formulated from the collective intuitions of past players. A standard model of bowling technique has been generally prescribed for both off-spin and leg-spin bowlers, but there has been no biomechanics research to validate this approach. This study measured 20 Type-2 off-spin and 15 Type-2 leg-spin bowlers using a 3D Cortex motion analysis system. Correlation coefficients between segmental kinematic variables and spin rate in the off-spin and leg-spin bowlers revealed that off-spin bowling was associated with an earlier movement time of the thorax, whereas leg-spin bowling was associated with a greater magnitude and earlier movement time of pelvis rotation, as well as a greater magnitude of pelvis-shoulder separation movement...
July 27, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28749730/static-versus-dynamic-kinematics-in-cyclists-a-comparison-of-goniometer-inclinometer-and-3d-motion-capture
#7
W Holliday, J Fisher, R Theo, J Swart
Kinematic measurements conducted during bike set-ups utilise either static or dynamic measures. There is currently limited data on reliability of static and dynamic measures nor consensus on which is the optimal method. The aim of the study was to assess the difference between static and dynamic measures of the ankle, knee, hip, shoulder and elbow. Nineteen subjects performed three separate trials for a 10-min duration at a fixed workload (70% of peak power output). Static measures were taken with a standard goniometer (GM), an inclinometer (IM) and dynamic three-dimensional motion capture (3DMC) using an eight camera motion capture system...
July 27, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28747277/glenosphere-size-in-reverse-shoulder-arthroplasty-is-larger-better-for-external-rotation-and-abduction-strength
#8
Andreas M Müller, Marian Born, Christian Jung, Matthias Flury, Christoph Kolling, Hans-Kaspar Schwyzer, Laurent Audigé
BACKGROUND: The role of glenosphere size in reverse shoulder arthroplasty (RSA) may be important in prosthetic stability, joint kinematics, rotator cuff tension and excursion, scapular impingement, humeral lateralization, deltoid wrap, and the occurrence of "notching." This study compared short- and midterm clinical and radiographic outcomes for 2 different glenosphere sizes of a single RSA type with respect to implant positioning, glenoid size, and morphology. METHODS: This retrospective analysis included 68 RSA procedures that were prospectively documented in a local register during a 5-year postoperative period...
July 24, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28743205/do-baseball-pitchers-improve-mechanics-after-biomechanical-evaluations
#9
Glenn S Fleisig, Alek Z Diffendaffer, Brett Ivey, Kyle T Aune
The purpose of this study was to determine how often flaws in pitching mechanics identified from biomechanical analysis are corrected. The biomechanics of 46 baseball pitchers were evaluated twice, with an average of 12 months (range 2-48 months) between evaluations. Pitchers were healthy at the time of both evaluations, competing at the high school, college, minor league or Major League level. After warming up, each participant pitched 10 full-effort fastballs. Automated three-dimensional motion analysis was used to compute eight kinematic parameters which were compared with a database of elite professional pitchers...
July 25, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28718754/rhythmic-interlimb-coordination-impairments-are-associated-with-mobility-limitations-among-older-adults
#10
Eric G James, Suzanne G Leveille, Jeffrey M Hausdorff, Thomas Travison, Sarah Cote, Philip Conatser, Murat Karabulut, Andrea C Mendes, David N Kennedy, Katherine L Tucker, Soham Al Snih, Kyriakos S Markides, Jonathan F Bean
Background/Study Context: Mobility limitations affect more than 25% of adults aged 70 years or older. This study tested the hypothesis that impairments in ankle and shoulder coordination are associated with mobility limitations among older adults. METHODS: his study consisted of conducted a cross-sectional analysis from a sample of community-dwelling older adults (N = 130) aged ≥67 years. Motion capture equipment was used to collect kinematic data during rhythmic antiphase coordination of the right and left: (a) ankles moving in dorsi-plantarflexion; and (b) glenohumeral ("shoulder") moving in flexion-extension while paced by an auditory metronome...
July 2017: Experimental Aging Research
https://www.readbyqxmd.com/read/28704683/visual-targeting-one-step-before-force-plates-has-no-effect-on-gait-parameters-in-orthopaedic-patients-during-level-walking
#11
Katrin Bracht-Schweizer, Marie Freslier, Sebastian Krapf, Jacqueline Romkes
In clinical gait analysis, it is challenging to acquire usable force plate data for a patient in a limited amount of time. The aim of this study was to compare three measurement protocols, to investigate if any one of them was more time-efficient than the others at collecting kinetic data. Three conditions were compared for 15 orthopaedic patients: 1) approaching the force plate with four steps, 2) approaching the force plate with six steps, and 3) approaching the force plate with four steps while stepping on a target one step before the first force plate...
July 8, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28693378/effects-of-load-carriage-and-work-boots-on-lower-limb-kinematics-of-industrial-workers
#12
Miao Tian, Huiju Park, Jun Li, Heekwang Koo, Qinwen Xu
Load and footwear condition are two crucial elements varying the kinematic responses during walking, which probably lead to chronic injury. Fifteen healthy male individual with no obvious gait abnormalities participated in this study. Apart from a no-load condition, four external load conditions with two load levels were investigated. Work boots were compared with running shoes to determine footwear effects. Significant impacts were found for lower limb range of motion at certain joints when carrying loads...
July 11, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28689828/influence-of-humeral-head-material-on-wear-performance-in-anatomic-shoulder-joint-arthroplasty
#13
Ulrike Mueller, Steffen Braun, Stefan Schroeder, Mark Schroeder, Robert Sonntag, Sebastian Jaeger, Jan Philippe Kretzer
BACKGROUND: The number of total shoulder arthroplasties has increased in the past years, with encouraging results. However, the survival of anatomic total shoulder arthroplasty (aTSA) is lower compared with that of knee and hip replacements. Wear-associated problems like loosening are well-known causes of long-term failure of aTSA. The main purpose of this study was to investigate the wear behavior of ceramic-polyethylene bearings compared with the standard metal-polyethylene bearings...
July 6, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28683420/shoulder-assessment-according-to-the-international-classification-of-functioning-by-means-of-inertial-sensor-technologies-a-systematic-review
#14
REVIEW
Liesbet De Baets, Rob van der Straaten, Thomas Matheve, Annick Timmermans
This review investigates current protocols using Inertial Measurement Units (IMUs) in shoulder research, and outlines future paths regarding IMU use for shoulder research. Different databases were searched for relevant articles. Criteria for study selection were (1) research in healthy persons or persons with shoulder problems, (2) IMUs applied as assessment tool for the shoulder (in healthy subjects and shoulder patients) or upper limb (in shoulder patients), (3) peer-reviewed, full-text papers in English or Dutch...
June 27, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28678610/occupant-responses-in-conventional-and-abts-seats-in-high-speed-rear-sled-tests
#15
David C Viano, Chantal S Parenteau, Roger Burnett, Priya Prasad
OBJECTIVE: This study compared biomechanical responses of a normally seated Hybrid III dummy on conventional and ABTS (all belts to seat) seats in 40.2 km/h (25 mph) rear sled tests. It determined the difference in performance with modern (≥2000 MY) seats compared to older (<2000 MY) seats and ABTS seats. METHODS: The seats were fixed in a sled buck subjected to a 40.2 km/h (25 mph) rear sled test. The pulse was a 15 g double-peak acceleration with 150 ms duration...
July 5, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28671953/clinical-assessment-and-three-dimensional-movement-analysis-an-integrated-approach-for-upper-limb-evaluation-in-children-with-unilateral-cerebral-palsy
#16
Lisa Mailleux, Ellen Jaspers, Els Ortibus, Cristina Simon-Martinez, Kaat Desloovere, Guy Molenaers, Katrijn Klingels, Hilde Feys
INTRODUCTION: The clinical application of upper limb (UL) three-dimensional movement analysis (3DMA) in children with unilateral cerebral palsy (uCP) remains challenging, despite its benefits compared to conventional clinical scales. Moreover, knowledge on UL movement pathology and how this relates to clinical parameters remains scarce. Therefore, we investigated UL kinematics across different manual ability classification system (MACS) levels and explored the relation between clinical and kinematic parameters in children with uCP...
2017: PloS One
https://www.readbyqxmd.com/read/28657855/errors-associated-with-utilizing-prescribed-scapular-kinematics-to-estimate-unconstrained-natural-upper-extremity-motion-in-musculoskeletal-modeling
#17
R Tyler Richardson, Elizabeth A Rapp, R Garry Quinton, Kristen F Nicholson, Brian A Knarr, Stephanie A Russo, Jill S Higginson, James G Richards
Musculoskeletal modeling is capable of estimating physiological parameters that cannot be directly measured, however, the validity of the results must be assessed. Several models utilize a scapular rhythm to prescribe kinematics, yet it is unknown how well they replicate natural scapular motion. This study evaluated kinematic errors associated with a model that employs a scapular rhythm using two shoulder movements - abduction and forward reach. Two versions of the model were tested - the original MoBL ARMS model that utilizes a scapular rhythm, and a modified MoBL ARMS model that permits unconstrained scapular motion...
June 28, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28652066/effects-of-scapular-stabilization-exercise-training-on-scapular-kinematics-disability-and-pain-in-subacromial-impingement-a-randomized-controlled-trial
#18
Elif Turgut, Irem Duzgun, Gul Baltaci
OBJECTIVE: To investigate the effects of two different exercise programs on three-dimensional scapular kinematics, disability, and pain in participants with subacromial impingement syndrome (SIS). DESIGN: Randomized controlled trial. SETTING: Outpatient clinic and research laboratory. PARTICIPANTS: Thirty participants who were diagnosed with SIS and who also exhibited scapular dyskinesis. INTERVENTIONS: The participants were randomized in two different exercise groups: 1) shoulder girdle stretching and strengthening with additional scapular stabilization exercises based on a kinetic chain approach (intervention group), and 2) shoulder girdle stretching and strengthening exercises only (control group)...
June 23, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28650947/three-dimensional-deformities-of-non-operative-midshaft-clavicle-fractures-a-surface-matching-analysis
#19
Satoshi Oki, Noboru Matsumura, Yoshimori Kiriyama, Takuji Iwamoto, Kazuki Sato, Takeo Nagura
OBJECTIVE: The purpose of this study was to describe the three-dimensional deformities of midshaft clavicle fractures, which had been treated nonoperatively, using computed tomography (CT) surface matching. METHODS: Twenty-one patients with unilateral midshaft clavicle fracture, who had been treated nonoperatively, were enrolled and evaluated retrospectively. The three-dimensional deformity of the fractured clavicle was evaluated by CT surface matching. CT scans of 21 age- and sex-matched patients with initial traumatic shoulder dislocation or proximal humeral fracture were enrolled as a control group, and the differences in three-dimensional deformities and lengths of the clavicles between the fracture group and the control group were evaluated...
June 15, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28649805/cross-country-skiing-movement-factorization-to-explore-relationships-between-skiing-economy-and-athletes-skills
#20
Barbara Pellegrini, Chiara Zoppirolli, Gennaro Boccia, Lorenzo Bortolan, Federico Schena
We investigated the relationships between the biomechanics of the double poling (DP) technique in cross-country skiing, its economy and athletes' skill. To this aim, skiers' motion has been factorized into components through principal component analysis (PCA).Eight high-level (HL) and eight regional level (RL) male cross-country skiers performed a 5-min submaximal DP trial while roller skiing on a treadmill at 14 km h(-1) and 2° incline. Whole-body kinematics was recorded with a motion capture system. PCA was applied to markers coordinates to extract principal movements (PMk ), which were ranked by their variance...
June 26, 2017: Scandinavian Journal of Medicine & Science in Sports
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