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shoulder kinematics

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https://www.readbyqxmd.com/read/28103299/walking-through-apertures-in-individuals-with-stroke
#1
Daisuke Muroi, Yasuhiro Hiroi, Teruaki Koshiba, Yohei Suzuki, Masahiro Kawaki, Takahiro Higuchi
OBJECTIVE: Walking through a narrow aperture requires unique postural configurations, i.e., body rotation in the yaw dimension. Stroke individuals may have difficulty performing the body rotations due to motor paralysis on one side of their body. The present study was therefore designed to investigate how successfully such individuals walk through apertures and how they perform body rotation behavior. METHOD: Stroke fallers (n = 10), stroke non-fallers (n = 13), and healthy controls (n = 23) participated...
2017: PloS One
https://www.readbyqxmd.com/read/28100095/shoulder-kinetics-during-start-up-and-propulsion-with-a-manual-wheelchair-within-the-initial-phase-of-uninstructed-training
#2
Samuel Hybois, Alice Siegel, Joseph Bascou, Nicolas Eydieux, Philippe Vaslin, Hélène Pillet, Pascale Fodé, Christophe Sauret
PURPOSE: Wheelchair locomotion is constraining for the upper limbs and involves a set of motor tasks that need to be learnt by a novice user. To understand this integration process, we investigated the evolution of shoulder kinetics during start-up and propulsion within the initial phase of low-intensity uninstructed training. MATERIALS AND METHODS: Seventeen novice able-bodied subjects performed a 120-min uninstructed practice distributed over 4 weeks. During the initial and final sessions, upper limbs kinematics and hand-rim kinetics were continuously collected...
January 19, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28071815/effect-of-glenohumeral-elevation-on-subacromial-supraspinatus-compression-risk-during-simulated-reaching
#3
Rebekah L Lawrence, Dustin M Schlangen, Katelyn A Schneider, Jonathan Schoenecker, Andrea L Senger, William C Starr, Justin L Staker, Jutta M Ellermann, Jonathan P Braman, Paula M Ludewig
Mechanical subacromial rotator cuff compression is one theoretical mechanism in the pathogenesis of rotator cuff disease. However, the relationship between shoulder kinematics and mechanical subacromial rotator cuff compression across the range of humeral elevation motion is not well understood. The purpose of this study was to investigate the effect of humeral elevation on subacromial compression risk of the supraspinatus during a simulated functional reaching task. Three-dimensional anatomical models were reconstructed from shoulder magnetic resonance images acquired from 20 subjects (10 asymptomatic, 10 symptomatic)...
January 10, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28060814/glenohumeral-joint-kinematics-following-clavicular-fracture-and-repairs
#4
Claudio Rosso, Michael Nasr, Kempland C Walley, Ethan R Harlow, Babak Haghpanah, Ashkan Vaziri, Arun J Ramappa, Ara Nazarian, Joseph P DeAngelis
BACKGROUND: The purpose of this biomechanical study was to determine the effect of shortened clavicle malunion on the center of rotation of the glenohumeral (GH) joint, and the capacity of repair to restore baseline kinematics. METHODS: Six shoulders underwent automated abduction (ABD) and abbreviated throwing motion (ATM) using a 7-DoF automated upper extremity testing system in combination with an infrared motion capture system to measure the center of rotation of the GH joint...
2017: PloS One
https://www.readbyqxmd.com/read/28052378/comparison-of-limb-kinematics-between-collected-and-lengthened-medium-extended-trot-in-two-groups-of-dressage-horses-on-two-different-surfaces
#5
V A Walker, C A Tranquille, J R Newton, S J Dyson, J Brandham, A J Northrop, R C Murray
BACKGROUND: Dressage horses are often asked to work in lengthened paces during training and competition, but to date there is limited information about the biomechanics of dressage-specific paces. Preliminary work has shown increased fetlock extension in extended compared with collected paces, but further investigation of the kinematic differences between collected, medium and extended trot in dressage horses is warranted. OBJECTIVES: Investigation of the effect of collected versus medium/extended trot on limb kinematics of dressage horses...
January 4, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28042977/full-can-test-mechanisms-of-a-positive-test-in-patients-with-shoulder-pain
#6
Mark K Timmons, Sevgi S Yesilyaprak, Jeff Ericksen, Lori A Michener
BACKGROUND: The full can test is theorized to produce compressive loads on the supraspinatus tendon within the subacromial space. Characterizing the width of the subacromial outlet, scapular orientation, and shoulder pain during the full can test will improve the mechanistic understanding of the positive full can test. METHODS: Cross-sectional repeated measures design. Participants with subacromial pain syndrome (n=30) were compared to a matched control group (n=30) during 2 conditions: passive support, and the full can test...
December 24, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/28038912/effect-of-lateralized-design-on-muscle-and-joint-reaction-forces-for-reverse-shoulder-arthroplasty
#7
William Liou, Yang Yang, Graysen R Petersen-Fitts, Daniel J Lombardo, Sasha Stine, Vani J Sabesan
BACKGROUND: Manufacturers of reverse shoulder arthroplasty (RSA) implants have recently designed innovative implants to optimize performance in rotator cuff-deficient shoulders. These advancements are not without tradeoffs and can have negative biomechanical effects. The objective of this study was to develop an integrated finite element analysis-kinematic model to compare the muscle forces and joint reaction forces (JRFs) of 3 different RSA designs. METHODS: A kinematic model of a normal shoulder joint was adapted from the Delft model and integrated with the well-validated OpenSim shoulder model...
December 27, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27986326/kinematic-models-of-the-upper-limb-joints-for-multibody-kinematics-optimisation-an-overview
#8
Sonia Duprey, Alexandre Naaim, Florent Moissenet, Mickaël Begon, Laurence Chèze
Soft tissue artefact (STA), i.e. the motion of the skin, fat and muscles gliding on the underlying bone, may lead to a marker position error reaching up to 8.7cm for the particular case of the scapula. Multibody kinematics optimisation (MKO) is one of the most efficient approaches used to reduce STA. It consists in minimising the distance between the positions of experimental markers on a subject skin and the simulated positions of the same markers embedded on a kinematic model. However, the efficiency of MKO directly relies on the chosen kinematic model...
December 9, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27942129/muscle-activation-patterns-in-acceleration-based-phases-during-reach-to-grasp-movement
#9
Keisuke Tokuda, Bumsuk Lee, Yasufumi Shiihara, Kazuhiro Takahashi, Naoki Wada, Kenji Shirakura, Hideomi Watanabe
[Purpose] An earlier study divided reaching activity into characteristic phases based on hand velocity profiles. By synchronizing muscle activities and the acceleration profile, a phasing approach for reaching movement, based on hand acceleration profiles, was attempted in order to elucidate the roles of individual muscle activities in the different phases of the acceleration profile in reaching movements. [Subjects and Methods] Ten healthy volunteer subjects participated in this study. The aim was to electromyographically evaluate muscles around the shoulder, the upper trapezius, the anterior deltoid, the biceps brachii, and the triceps brachii, most of which have been used to evaluate arm motion, as well as the acceleration of the upper limb during simple reaching movement in the reach-to-grasp task...
November 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27935559/application-of-a-model-to-analyze-shoulder-biomechanics-in-adult-patients-with-spinal-cord-injury-when-walking-with-crutches-in-two-different-gait-patterns
#10
Enrique Perez-Rizo, Fernando Trincado-Alonso, Soraya Pérez-Nombela, Antonio Del Ama-Espinosa, Fernando Jiménez-Díaz, Vicente Lozano-Berrio, Angel Gil-Agudo
BACKGROUND: Specific biomechanical models have been developed to study gait using crutches. Clinical application of these models is needed in adult spinal cord injury (SCI) population walking with different patterns of gait with crutches to prevent overuse shoulder injuries. OBJECTIVE: To apply a biomechanical model in a clinical environment to analyze shoulder in adult SCI patients walking with two different patterns of gait with crutches: two point reciprocal gait (RG) and swing-through gait (SG)...
December 8, 2016: NeuroRehabilitation
https://www.readbyqxmd.com/read/27918696/validation-of-inertial-measurement-units-for-upper-body-kinematics
#11
Melissa M B Morrow, Bethany Lowndes, Emma Fortune, Kenton R Kaufman, Susan Hallbeck
The purpose of this study was to validate a commercially available IMU system against a standard lab-based motion capture system for the measurement of shoulder elevation, elbow flexion, trunk flexion/extension and neck flexion/extension kinematics. The validation analyses were applied to six surgical faculty members performing a standard, simulated surgical training task that mimics minimally invasive surgery. Three-dimensional joint kinematics were simultaneously recorded by an optical motion capture system and an IMU system with six sensors placed on the head, chest, and bilateral upper and lower arms...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27908458/inter-rater-reliability-of-shoulder-measurements-in-middle-aged-women
#12
A De Groef, M Van Kampen, N Vervloesem, E Clabau, M-R Christiaens, P Neven, I Geraerts, F Struyf, N Devoogdt
OBJECTIVES: To investigate inter-rater reliability of a set of shoulder measurements including inclinometry [shoulder range of motion (ROM)], acromion-table distance and pectoralis minor muscle length (static scapular positioning), upward rotation with two inclinometers (scapular kinematics) and pain pressure thresholds (muscle tenderness) in middle-aged women. DESIGN: Observational study. PARTICIPANTS: Thirty symptom-free middle-aged women (first cohort) were measured by two raters...
July 20, 2016: Physiotherapy
https://www.readbyqxmd.com/read/27900708/can-posterior-capsular-stretching-rehabilitation-protocol-change-scapula-kinematics-in-asymptomatic-baseball-pitchers
#13
A Pellegrini, P Tonino, D Salazar, K Hendrix, I Parel, A Cutti, P Paladini, F Ceccarelli, G Porcellini
PURPOSE: Scapular dyskinesis is a recognized cause of shoulder pain in the throwing shoulder of baseball pitchers and athletes who participate in overhead sports. Past studies have assessed scapular kinematics using electromagnetic tracking devices and have shown a correlation between posterior shoulder tightness and forward scapular posture. The purpose of our study is to evaluate the scapular kinematics, before and after a 4-week posterior stretching protocol in asymptomatic pitchers...
December 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/27872403/biomechanical-analysis-of-weighted-ball-exercises-for-baseball-pitchers
#14
Glenn S Fleisig, Alek Z Diffendaffer, Kyle T Aune, Brett Ivey, Walter A Laughlin
BACKGROUND: Weighted-ball throwing programs are commonly used in training baseball pitchers to increase ball velocity. The purpose of this study was to compare kinematics and kinetics among weighted-ball exercises with values from standard pitching (ie, pitching standard 5-oz baseballs from a mound). HYPOTHESIS: Ball and arm velocities would be greater with lighter balls and joint kinetics would be greater with heavier balls. STUDY DESIGN: Controlled laboratory study...
November 21, 2016: Sports Health
https://www.readbyqxmd.com/read/27855670/influence-of-disruption-of-the-acromioclavicular-and-coracoclavicular-ligaments-on-glenohumeral-motion-a-kinematic-evaluation
#15
Kempland C Walley, Babak Haghpanah, Andreas Hingsammer, Ethan R Harlow, Ashkan Vaziri, Joseph P DeAngelis, Ara Nazarian, Arun J Ramappa
BACKGROUND: Changes to the integrity of the acromioclavicular (AC) joint impact scapulothoracic and clavicular kinematics. AC ligaments provide anterior-posterior stability, while the coracoclavicular (CC) ligaments provide superior-inferior stability and a restraint to scapular internal rotation. The purpose of this cadaveric study was to describe the effect of sequential AC and CC sectioning on glenohumeral (GH) kinematics during abduction (ABD) of the arm. We hypothesized that complete AC ligament insult would result in altered GH translation in the anterior-posterior plane during abduction, while subsequent sectioning of both CC ligaments would result in an increasing inferior shift in GH translation...
November 17, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27834563/upper-extremity-and-cue-kinematics-and-shoulder-muscles-emg-activity-of-novus-players-of-different-skill-levels
#16
Viire Talts, Jaan Ereline, Tatjana Kums, Mati Pääsuke, Helena Gapeyeva
Our aim with the present study was to compare upper extremity and cue kinematics, and electromyographic (EMG) activation of shoulder muscles, during novus (a special form of billiards) shots of different difficulty levels. Ten proficient and ten less-skilled novus players performed three types of novus shots (penalties, cuts, rebounds) ten times each. During each shot, elbow flexion and cue-forearm angles (using a movement analysis system), and surface EMG activity of the trapezius, posterior and lateral deltoid muscles of each subject's dominant side, were measured...
November 11, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27821310/differences-in-motor-variability-among-individuals-performing-a-standardized-short-cycle-manual-task
#17
Jonas Sandlund, Divya Srinivasan, Marina Heiden, Svend Erik Mathiassen
Motor variability (MV) has been suggested to be a determinant of the risk for developing musculoskeletal disorders in repetitive work. In this study we examined whether individuals consistently differed in the extent of motor variability when performing a standardized short-cycle manual task. On three separate days, arm kinematics was recorded in 14 healthy subjects performing a pipetting task, transferring liquid from a pick-up tube to eight target tubes with a cycle time of 2.8s. Cycle-to-cycle standard deviations (SD) of a large selection of shoulder and elbow kinematic variables, were processed using principal component analysis (PCA)...
November 4, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27809700/an-examination-of-the-correlation-amongst-trunk-flexibility-x-factor-and-clubhead-speed-in-skilled-golfers
#18
Christopher Joyce
Skilled golfers are reported to be more flexible than lesser able golfers, which may assist in increased x-factor (shoulder-pelvis separation) at the top of the backswing. However, it is unknown if increased flexibility produces faster clubhead speed. The aim of this study was to investigate the correlations amongst trunk flexibility and x-factor, as well as the association between flexibility and clubhead speed in low handicap golfers. Fifteen low handicap male golfers who displayed a modern swing, had their trunk static anatomical end-range of motion (flexibility) and driver swing kinematics were measured...
November 4, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27793408/main-component-of-soft-tissue-artifact-of-the-upper-limbs-with-respect-to-different-functional-daily-life-and-sports-movements
#19
Y Blache, R Dumas, A Lundberg, M Begon
Soft tissue artifact (STA) is the main source of error in kinematic estimation of human movements based on skin markers. Our objective was to determine the components of marker displacements that best describe STA of the shoulder and arm (i.e. clavicle, scapula and humerus). Four participants performed arm flexion and rotation, a daily-life and a sports movement. Three pins with reflective markers were inserted into the clavicle, scapula and humerus. In addition, up to seven skin markers were stuck on each segment...
October 20, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27785550/the-effects-of-obstacle-proximity-on-aperture-crossing-behaviours
#20
Carmen S Baker, Michael E Cinelli
Affordance theory and behavioural dynamics have been used as theoretical constructs to explain how individuals interact with the environment in order to avoid obstacles. Features of obstacle distance and multiple obstacle avoidance have been discussed in unique studies, yet the interactions of these environmental features have yet to be explored. The purpose of this study was to asses the effects of obstacle distance, relative to the goal, on aperture crossing strategies. Kinematics and gaze behaviours were assessed in a cohort of female young adults (N = 24, 21...
October 26, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
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