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scapulohumeral rhythm

Antonio Cusano, Nicholas Pagani, Xinning Li
Medial scapular winging is often due to dysfunction of the serratus anterior muscle as a result of injury to the long thoracic nerve. Impairment of the serratus anterior muscle may cause uncoordinated scapulohumeral rhythm during shoulder elevation and subsequent subscapular or shoulder pain, subacromial impingement, and glenohumeral joint instability. Although long thoracic nerve injury typically resolves in 12 to 18 months after a physical therapy regimen, surgical intervention is indicated in patients who fail conservative management...
August 2017: Arthroscopy Techniques
George Sanchez, Márcio B Ferrari, Anthony Sanchez, Nicholas I Kennedy, Matthew T Provencher
Symptomatic scapular winging resulting in scapular dyskinesia leads to a wide spectrum of clinical complaints, most notably periscapular pain. The malpositioning of the scapula, termed through use of the acronym SICK (scapular malposition, inferior-medial border prominence, coracoid pain and malposition, and dyskinesia of scapular movement), is due to the irregular activity of one or more of the periscapular muscles. In particular, the serratus anterior, innervated by the long thoracic nerve, is a key muscle that stabilizes the scapula and provides coordinated scapulohumeral rhythm...
August 2017: Arthroscopy Techniques
Guinevere S Bennett
OBJECTIVE: This study compared interactive video test performance and students' overall class performance. The hypothesis was that there would be a difference in video test performance compared to overall class performance. METHODS: A total of 30 students participated in the pilot study from a master's level biomechanics course. Students completed four interactive video tests using EduCanon; content of videos included base of support, lever systems, scapulohumeral rhythm, and postural analysis...
March 2017: Journal of Chiropractic Education
Luís Faria, Bárbara Campos, Renato Natal Jorge
PURPOSE: The shoulder girdle is a complex system, comprised by a kinematic chain and stabilizers. Due to the delicate equilibrium and synchronism between mobility and stability, high external loads may compromise its physiology, increasing the risk of injuries. Thus, this study intends to fully characterize the effects of a rugby tackle on the shoulder's anatomy and physiology. METHODS: For the experimental procedures, a matrix of pressure sensors was used, based on the Teckscan® pressure in-soles, force plates, an isokinetic dynamometer and sEMG (surface electromyography)...
2017: Acta of Bioengineering and Biomechanics
Rana Soltani-Zarrin, Amin Zeiaee, Reza Langari, Nina Robson
This paper proposes a reference path generation method for upper-limb rehabilitation exoskeletons considering the scapulohumeral rhythms of the shoulder. The developed method is based on Central Nervous System's (CNS) governing rules for coordination of arm motions, and to the best of our knowledge is the first computational model to consider the motion of the inner shoulder in path generation. Existing reference generation methods which utilize computational models such as minimum jerk, minimum torque, etc, are based on the assumption that the shoulder joint does not move, and the origin of the reference frame is defined at the center of the glenohumeral (GH) joint...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
Alexandra Roren, Christelle Nguyen, Clémence Palazzo, Fouad Fayad, Michel Revel, Thomas Gregory, Serge Poiraudeau, Agnès Roby-Brami, Marie-Martine Lefèvre-Colau
BACKGROUND: The movement of the arm relative to the trunk results from coordinated 3D glenohumeral and scapulothoracic movements. Changes in scapula kinematics may occur after total shoulder arthroplasty and could affect clinical and functional outcomes. OBJECTIVES: To assess the 3D movement of the scapula during arm elevation after anatomic and reverse total shoulder arthroplasty. DESIGN/METHODS: This was a single-centre, non-randomized, controlled cross-sectional study...
June 2017: Musculoskeletal Science & Practice
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
Sana Salah, Houda Migaou, Zied Belaaj, Soumaya Boudokhane, Anis Jellad, Abderrazak Abid, Zohra Ben Salah Frih
OBJECTIVE: Winging of the scapula has a variety of causes and a variable prognosis. It contributes to a disruption of the scapulohumeral rhythm with a decreased flexion and abduction of the upper extremity and a source of a considerable pain. This condition can affect the ability to perform activities of daily living. The most common cause of scapula winging is serratus anterior paralysis resulting from a lesion of the long thoracic nerve. The rupture of the muscle itself remains uncommon...
September 2016: Annals of Physical and Rehabilitation Medicine
Kwang Won Lee, Yong In Kim, Ha Yong Kim, Dae Suk Yang, Gyu Sang Lee, Won Sik Choy
BACKGROUND: There have been few reports on altered kinematics of the shoulder after reverse total shoulder arthroplasty (RTSA). We investigated differences in 3-dimensional (3D) scapular motions assessed using an optical tracking system between RTSA treated shoulders and asymptomatic contralateral shoulders during arm motion. METHODS: Thirteen patients who underwent RTSA were assessed for active arm elevation in 2 distinct elevation planes (sagittal plane flexion and scapular plane abduction)...
September 2016: Clinics in Orthopedic Surgery
Xavier Robert-Lachaine, Paul Allard, Véronique Godbout, Patrice Tétreault, Mickael Begon
BACKGROUND: Some patients with rotator cuff tears feel pain without functional limitation, whereas others show a decrease in range of motion. To investigate this distinction, the scapulohumeral rhythm was used to conduct a functional evaluation of shoulder joints' coordination. The objective was to characterize patients according to their active range of motion without pain and their scapulohumeral rhythm compared with healthy individuals. MATERIALS AND METHODS: Fourteen patients with rotator cuff tears and 14 healthy individuals were set up with 35 reflective markers on the trunk and upper limb tracked by an optoelectronic system to measure the scapulohumeral rhythm...
October 2016: Journal of Shoulder and Elbow Surgery
Yukiko Nakamura, Masaaki Tsuruike, Todd S Ellenbecker
CONTEXT: The appropriate resistance intensity to prescribe for shoulder rehabilitative exercise is not completely known. Excessive activation of the deltoid and upper trapezius muscles could be counterproductive for scapulohumeral rhythm during humeral elevation. OBJECTIVE: To identify the effects of different exercise intensities on the scapular muscles during a free-motion "robbery" exercise performed in different degrees of shoulder abduction in seated and standing positions...
March 2016: Journal of Athletic Training
Kazuya Madokoro, Masafumi Gotoh, Yoshihiro Kai, Tatsuyuki Kakuma, Takashi Nagamatsu, Naoto Shiba
BACKGROUND: Failure of the scapulohumeral rhythm (SHR) is observed in patients with shoulder joint dysfunction. The SHR reportedly has a 2:1 ratio during scapular upward rotation with arm elevation. However, three-dimensional scapular motion analysis has indicated variations in this ratio according to the arm elevation angle. We observed 2 distinct patterns: the scapular upward rotation decreased after knot formation (type I) or increased after knot formation (type II) during arm elevation...
December 2016: Journal of Experimental Orthopaedics
Xavier Robert-Lachaine, Paul Allard, Veronique Gobout, Mickael Begon
CONTEXT: Supraspinatus tear is a common rotator cuff injury. During rehabilitation, debate persists regarding the most appropriate exercises. Whereas shoulder coordination is part of normal arm function, it has been infrequently considered in the context of exercise selection. OBJECTIVE: To assess shoulder-motion coordination during 2 common supraspinatus rehabilitation exercises and to characterize load and motion-direction influences on shoulder coordination. DESIGN: Descriptive laboratory study...
November 2015: Journal of Athletic Training
Cristina Roldán-Jiménez, Antonio I Cuesta-Vargas
BACKGROUND: In recent years, there has been a great interest in analyzing upper-limb kinematics in order to investigate scapulohumeral rhythm, as its alteration has been associated with shoulder joint complex injuries. The use of inertial sensors is presented as a convenient and portable analysis method for studying kinematics in terms of angular mobility and linear acceleration. The aim of this study was to analyze upper-limbs kinematics in the three anatomical axes, obtained by inertial sensors...
2015: BMC Research Notes
Shoji Konda, Toshimasa Yanai, Shinji Sakurai
BACKGROUND: The role of the scapula during high-velocity baseball pitching has been described without 3-dimensional kinematic data. It has been speculated that the scapula functions to align the humerus with the spine of the scapula on both the transverse and scapular planes at the end of the arm-cocking phase. HYPOTHESIS: Two hypotheses were formulated: (1) the scapulothoracic protraction angle correlates with the humerothoracic horizontal adduction angle among participants, and (2) the scapulohumeral rhythm of the humerothoracic elevation is not the same as the normal ratio (2:1) observed widely in controlled abductions...
October 2015: American Journal of Sports Medicine
Seyed Hossein Hosseinimehr, Mehrdad Anbarian, Ali Asghar Norasteh, Javad Fardmal, Mohammad Taghi Khosravi
Previous studies have stated that the scapulohumeral rhythm dysfunction can make person prone to glenohumeral joint pathologies. The purpose of this study was to compare scapular upward rotation and scapulohumeral rhythm between dominant and non-dominant shoulder in male overhead athletes and non-athletes. Seventeen overhead athletes and seventeen non-athletes volunteered for this study. Two inclinometers were used to measure humeral abduction and scapular upward rotation in rest position, 45°, 90° and 135° humeral abduction in frontal plane...
December 2015: Manual Therapy
David Walker, Keisuke Matsuki, Aimee M Struk, Thomas W Wright, Scott A Banks
BACKGROUND: Little is known about kinematic function of reverse total shoulder arthroplasty (RTSA). Scapulohumeral rhythm (SHR) is a common metric for assessing muscle function and shoulder joint motion. The purpose of this study was to compare SHR in shoulders with RTSA to normal shoulders. METHODS: Twenty-eight subjects, more than 12 months after unilateral RTSA, were recruited for an Institutional Review Board-approved study. Subjects performed arm abduction in the coronal plane with and without a 1...
July 2015: Journal of Shoulder and Elbow Surgery
Tsun-Shun Huang, Han-Yi Huang, Tyng-Guey Wang, Yung-Shen Tsai, Jiu-Jenq Lin
BACKGROUND: Assessment of scapular dyskinesis (SD) is of clinical interest, as SD is believed to be related to shoulder pathology. However, no clinical assessment with sufficient reliability to identify SD and provide treatment strategies is available. OBJECTIVES: The purpose of this study was to investigate the reliability of the comprehensive SD classification method. DESIGN: Cross-sectional reliability study. METHOD: Sixty subjects with unilateral shoulder pain were evaluated by two independent physiotherapists with a visual-based palpation method...
June 2015: Manual Therapy
Hiroki Kawashima, Kaoru Tada, Seigo Suganuma, Hiroyuki Tsuchiya, Shigeru Sanada
We hypothesized that wrist joint motion involves a "wrist rhythm" similar to the scapulohumeral rhythm. Therefore, we used a flat-panel detector to evaluate the ratio of radiolunate and capitolunate joint motions during wrist joint motion by dynamic radiography. The subjects were 20 healthy men. Dynamic imaging of the wrist joint was performed during active exercise for a total of ten seconds. In this study, we defined the radiocarpal (RL angle) and midcarpal joint angle (CL angle) as the wrist joint angle in the obtained images and measured the variation of these angles...
2014: Hand Surgery
Cyrus Taghizadeh Delkhoush, Nader Maroufi, Ismail Ebrahimi Takamjani, Farzam Farahmand, Ali Shakourirad, Hamid Haghani
BACKGROUND: Patients who have shoulder pain usually have compensatory or contributory deviation of shoulder motion during arm elevation. In the traditional scapulohumeral rhythm, the share of the acromioclavicular (AC) and the sternoclavicular (SC) joint movements and also the role of AC internal rotation angle are unknown. OBJECTIVES: The main purpose of this study was to measure and compare the segmentary scapulohumeral rhythm (SSHR) during scapular arm elevation at a steady rotational speed in athletes with and without impingement syndrome...
May 2014: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
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