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shoulder kinematics

Elizabeth E Hibberd, Kevin G Laudner, Kristen L Kucera, David J Berkoff, Bing Yu, Joseph B Myers
BACKGROUND: Subacromial space distance and forward head and shoulder posture are common characteristics resulting from swim training. These alterations can cause abnormal scapular kinematics and positioning, potentially increasing compression of structures in the subacromial space and increasing the risk for the development of swimmer's shoulder. PURPOSE: To evaluate the effect of the swim training season on subacromial space distance and forward head and forward shoulder posture as well as to determine the relationship between these variables...
October 18, 2016: American Journal of Sports Medicine
Daniela Ohlendorf, Christina Erbe, Imke Hauck, Jennifer Nowak, Ingo Hermanns, Dirk Ditchen, Rolf Ellegast, David A Groneberg
BACKGROUND: In Germany, about 86.7 % of the dentists have stated to suffer from pain in the neck and shoulder region. These findings are predominantly based on surveys. Therefore the objective of this study is to conduct a kinematic analysis of occupational posture in dentistry. METHODS: Twenty one dentists (11 f/10 m; age: 40.1 ± 10.4 years) have participated in this examination. The CUELA-System was used to collect kinematic data of the activities on an average dental workday...
October 18, 2016: BMC Musculoskeletal Disorders
Nienke W Willigenburg, Michael P McNally, Timothy E Hewett, Stephen J Page
The authors examined the efficacy of an 8-week regimen combining repetitive task-specific practice (RTP) with a myoelectric brace (RTP+Myomo) on paretic upper extremity (UE; use in valued activities, perceived recovery, and reaching kinematics) in 12 subjects (4 men; M age = 53.5 years; mean time poststroke = 61.7 months). Seven subjects were administered RTP+Myomo therapy, and 5 were administered RTP only. Both groups participated in individualized, 45-min therapy sessions occurring 3 days/week over an 8-week period...
October 17, 2016: Journal of Motor Behavior
Timothy G Baumer, Derek Chan, Veronica Mende, Jack Dischler, Roger Zauel, Marnix van Holsbeeck, Daniel S Siegal, George Divine, Vasilios Moutzouros, Michael J Bey
BACKGROUND: Physical therapy (PT) is often prescribed for patients with rotator cuff tears. The extent to which PT influences strength, range of motion (ROM), and patient-reported outcomes has been studied extensively, but the effect of PT on in vivo joint kinematics is not well understood. PURPOSE: To assess the influence of symptomatic rotator cuff pathology and the effects of PT on shoulder motion, strength, and patient-reported outcomes. STUDY DESIGN: Controlled laboratory study...
September 2016: Orthopaedic Journal of Sports Medicine
Jernej Čamernik, Zrinka Potocanac, Luka Peternel, Jan Babič
When balance is exposed to perturbations, hand contacts are often used to assist postural control. We investigated the immediate and the transitionary effects of supportive hand contacts during continuous anteroposterior perturbations of stance by automated waist-pulls. Ten young adults were perturbed for 5 min and required to maintain balance by holding to a stationary, shoulder-high handle and following its removal. Center of pressure (COP) displacement, hip, knee and ankle angles, leg and trunk muscle activity and handle contact forces were acquired...
2016: Frontiers in Human Neuroscience
Yin-Liang Lin, Andrew Karduna
While synchronous movement of glenohumeral and scapulothoracic joints has been emphasized in previous kinematics studies, most investigations of shoulder joint position sense have treated the shoulder complex as a single joint. The purposes of this study were to investigate the joint position sense errors of the humerothoracic, glenohumeral and scapulothoracic joints at different elevation angles and to examine whether the errors of the glenohumeral and scapulothoracic joints contribute to the errors of the humerothoracic joint...
October 5, 2016: Journal of Applied Biomechanics
Florian Monjo, Nicolas Forestier
Muscle fatigue modifies the gain between motor command magnitude and the mechanical muscular response. In other words, post-fatigue, central drives to the muscles must increase to maintain a particular submaximum mechanical output. In this study, we tested the hypothesis that this modified gain can be predicted by the central nervous system (CNS) during discrete ballistic movements. In two separate experiments, subjects were required to perform shoulder flexions in standing and sitting positions at submaximum target peak accelerations...
September 30, 2016: Neuroscience
Tsun-Shun Huang, Chien-Ying Huang, Hsiang-Ling Ou, Jiu-Jenq Lin
BACKGROUND: Patterns of scapular dyskinesis have unique scapular kinematics and associated muscular activation. The characteristics of unique dyskinesis patterns may be associated with functional disability. OBJECTIVES: To investigate whether the shoulder function level and primary dysfunction items were different in unique dyskinesis pattern. The factors associated with shoulder dysfunction in different dyskinesis patterns were identified. DESIGN: Cross-sectional study...
September 13, 2016: Manual Therapy
Christophe Duret, Anne Gaelle Grosmaire, Ophélie Courtial
OBJECTIVE: In stroke patients, motor impairments evaluated during the first few weeks usually predict upper limb motor outcomes after rehabilitation. However, a recent growing literature suggests that severe patients might not follow this principle [1]. This study aimed at exploring predictors of motor recovery after intensive training in that sub population of stroke patients. MATERIAL/PATIENTS AND METHODS: Thirty-eight patients with sub-acute hemiparesis (19 females, age 56±17 [19-87] years; time from stroke, 55±22 days) carried out 16 sessions (33±12 days) of robot-assisted adaptive training using a shoulder/elbow device integrated into conventional care...
September 2016: Annals of Physical and Rehabilitation Medicine
Jessy Lauer, Stéphane Vigier, Frédéric Delage, Alain Meudec, Jean-Michel Pollet, João Paulo Vilas-Boas, Annie Rouard
OBJECTIVE: Aquatic shoulder exercises are widely implemented into rehabilitation programs to provide early muscle strengthening and improved joint mobility. However, since the drag - the force exerted by the water on the moving segments - is very hard to measure, an in-depth knowledge of internal joint load is lacking, which ultimately prevents healthcare professionals from understanding all clinical implications. For the first time, shoulder joint moment, work, and power were calculated through a novel, validated numerical approach coupling fluid flow simulations and inverse dynamics...
September 2016: Annals of Physical and Rehabilitation Medicine
Alexandra Roren, Marie-Martine Lefevre-Colau, Agnès Roby-Brami, Christelle Nguyen, Serge Poiraudeau
OBJECTIVE: Scapular motion is essential for full, functional mobility of the arm. Many shoulder pathologies are associated with alterations of scapular kinematics which have been only little studied in total shoulder arthroplasties. The aim of this study was to compare the 3D scapula kinematics in two groups of patients with total shoulder anatomic (aTSA) or reverse (rTSA) arthoplasties to asymptomatic controls of comparable age during two arm elevation tasks (abduction and flexion) and two simulations of activity of daily living ("hair combing" and "back washing")...
September 2016: Annals of Physical and Rehabilitation Medicine
Roberto Colombo, Fabrizio Pisano, Carmen Delconte, Alessandra Mazzone, Giuseppe Grioni, Marisa Castagna, Giacomo Bazzini, Chiara Imarisio, Giorgio Maggioni, Caterina Pistarini
BACKGROUND: Several robotic devices have been proposed for upper limb rehabilitation, but they differ in terms of application fields and the technical solutions implemented. AIM: To compare the effectiveness of three different robotic devices for shoulder-elbow rehabilitation in reducing motor impairment and improving motor performance in post-stroke patients. DESIGN: Retrospective multi-center study. SETTING: Inpatient rehabilitation hospital...
September 27, 2016: European Journal of Physical and Rehabilitation Medicine
Karen A Keenan, Jonathan S Akins, Michelle Varnell, John Abt, Mita Lovalekar, Scott Lephart, Timothy C Sell
OBJECTIVE: To examine the effect of kinesiology tape (KT) on shoulder strength, proprioception, and scapular kinematics in healthy and Subacromial Impingement Syndrome (SAIS) subjects. DESIGN: Placebo-controlled quasi-experimental study. SETTING: Research laboratory. PARTICIPANTS: A total of 30 physically active subjects participated. Ten healthy subjects with no previous history of shoulder pathology received KT on the dominant shoulder...
June 19, 2016: Physical Therapy in Sport
Jessica M Fritz, Ryan R Inawat, Brooke A Slavens, John R McGuire, Dean W Ziegler, Sergey S Tarima, Steven I Grindel, Gerald F Harris
BACKGROUND: The increasing demand for rotator cuff (RC) repair patients to return to work as soon as they are physically able has led to exploration of when this is feasible. Current guidelines from our orthopedic surgery clinic recommend a return to work at 9 weeks postoperation. To more fully define capacity to return to work, the current study was conducted using a unique series of quantitative tools. To date, no study has combined 3-dimensional (3D) motion analysis with electromyography (EMG) assessment during activities of daily living (ADLs), including desk tasks, and commonly prescribed rehabilitation exercise...
September 14, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
Ayman Assi, Ziad Bakouny, Mohammad Karam, Abir Massaad, Wafa Skalli, Ismat Ghanem
The effect of dominance on upper limb (UL) kinematics has only been studied on scapular movements. Moreover, when an anatomical UL movement is performed in a specific plane, secondary movements in the remaining planes involuntarily occur. These secondary movements have not been previously evaluated. The aim of this study was to compare the kinematics of primary and secondary angles of dominant and non-dominant UL during anatomical movements in asymptomatic adults. 25 asymptomatic adults performed 6 anatomical movements bilaterally: shoulder flexion-extension, abduction-adduction, horizontal abduction-adduction, internal-external rotation, elbow flexion-extension and wrist pronation-supination...
September 14, 2016: Human Movement Science
Silvio Scena, Roberto Steindler, Moira Ceci, Stefano Maria Zuccaro, Eli Carmeli
BACKGROUND: The ability to maintain static and dynamic balance is a prerequisite for safe walking and for obtaining functional mobility. For this reason, a reliable and valid means of screening for risk of falls is needed. The functional reach test (FRT) is used in many countries, yet it does not provide some kinematic parameters such as shoulder or pelvic girdles translation. The purpose was to analyze video records measuring of distance, velocity, time length, arm direction and girdles translation while doing FRT...
October 2016: Journal of Clinical Medicine Research
Steven A Lavender, Shasank Nagavarapu, W Gary Allread
Many retail distribution centers (DCs) manually load and unload boxes into or out of trailers and shipping containers. This study investigated whether an articulating belt conveyor with a height adjustable platform, positioned at the end of an extendable conveyor, significantly reduces shoulder and back muscle loading and the spine kinematics associated with these tasks. Electromyographic and kinematic data were collected from eight volunteer employees as trailers at a shoe DC were unloaded and from nine volunteer employees as trailers at an apparel DC were loaded...
January 2017: Applied Ergonomics
Kathleen A Swanik, Stephen J Thomas, Aaron H Struminger, Kellie C Huxel Bliven, John D Kelly Iv, Charles B Swanik
CONTEXT: Plyometric training is credited with providing benefits in performance and dynamic restraint. However, limited prospective data exists quantifying kinematic adaptations such as amortization time, glenohumeral rotation, and scapulothoracic position, which may underlie its efficacy for upper extremity rehabilitation or performance enhancement. OBJECTIVE: To measure upper extremity kinematics and plyometric phase times before and after an 8 week upper extremity strength and plyometric training programs...
August 24, 2016: Journal of Sport Rehabilitation
Kyoung Ju Han, Jin Young Kim
[Purpose] This study compared the functional and kinematic changes associated with two rehabilitation protocols: bilateral and unilateral movement training. [Subjects and Methods] Twenty-five patients with chronic stroke were randomly assigned to two training protocols for four weeks of training. Each training session consisted of three tasks. The tasks were performed with either the impaired and unimpaired arms moving synchronously (bilateral training) or with the impaired arm alone (unilateral training). To compare the changes associated with each rehabilitation protocol, functional and kinematic assessments were performed before and after the interventions...
August 2016: Journal of Physical Therapy Science
Aaron Lear, Niraj Patel
The windmill softball pitch generates considerable forces about the athlete's shoulder and elbow. The injury pattern of softball pitchers seems to be primarily overuse injury, and they seem not to suffer the same volume of injury that baseball pitchers do. This article will explore softball pitching techniques, kinetics and kinematics of the windmill pitch, epidemiology of softball pitchers, and discuss possible etiologies of softball pitching injuries.
September 2016: Current Sports Medicine Reports
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