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Scapular kinematics

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https://www.readbyqxmd.com/read/28747702/movement-pattern-of-scapular-dyskinesis-in-symptomatic-overhead-athletes
#1
Tsun-Shun Huang, Jiu-Jenq Lin, Hsiang-Ling Ou, Yu-Ting Chen
This study investigated the characteristics of arm elevation via principal component analysis in symptomatic overhead athletes with scapular dyskinesis. One hundred-thirty-four overhead athletes with scapular dyskinesis [24: inferior angle prominence (pattern I); 46: medial border prominence (pattern II), 64: pattern I + II] were evaluated by three-dimensional electromagnetic motion and electromyography to record the scapular kinematics (upward rotation/posterior tipping/exterior rotation) and muscle activation (upper trapezius: UT; middle trapezius: MT; lower trapezius: LT; serratus anterior: SA) during lowering phase of arm elevation...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747277/glenosphere-size-in-reverse-shoulder-arthroplasty-is-larger-better-for-external-rotation-and-abduction-strength
#2
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/28724735/dual-function-of-the-pectoral-girdle-for-feeding-and-locomotion-in-white-spotted-bamboo-sharks
#3
Ariel L Camp, Bradley Scott, Elizabeth L Brainerd, Cheryl D Wilga
Positioned at the intersection of the head, body and forelimb, the pectoral girdle has the potential to function in both feeding and locomotor behaviours-although the latter has been studied far more. In ray-finned fishes, the pectoral girdle attaches directly to the skull and is retracted during suction feeding, enabling the ventral body muscles to power rapid mouth expansion. However, in sharks, the pectoral girdle is displaced caudally and entirely separate from the skull (as in tetrapods), raising the question of whether it is mobile during suction feeding and contributing to suction expansion...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28657855/errors-associated-with-utilizing-prescribed-scapular-kinematics-to-estimate-unconstrained-natural-upper-extremity-motion-in-musculoskeletal-modeling
#4
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
#5
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
#6
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/28650238/three-dimensional-inverse-dynamics-of-the-forelimb-of-beagles-at-a-walk-and-trot
#7
Emanuel Andrada, Lars Reinhardt, Karin Lucas, Martin S Fischer
OBJECTIVE To perform 3-D inverse dynamics analysis of the entire forelimb of healthy dogs during a walk and trot. ANIMALS 5 healthy adult Beagles. PROCEDURES The left forelimb of each dog was instrumented with 19 anatomic markers. X-ray fluoroscopy was used to optimize marker positions and perform scientific rotoscoping for 1 dog. Inverse dynamics were computed for each dog during a walk and trot on the basis of data obtained from an infrared motion-capture system and instrumented quad-band treadmill. Morphometric data were obtained from a virtual reconstruction of the left forelimb generated from a CT scan of the same dog that underwent scientific rotoscoping...
July 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28641241/influence-of-shoulder-kinematic-estimate-on-joint-and-muscle-mechanics-predicted-by-musculoskeletal-model
#8
Yoann Blache, Mickael Begon
Little information is available in the existing literature regarding the influence of the scapular kinematic estimate method on musculoskeletal analysis. This study aimed to assess the propagation of errors due to the method used for scapular kinematics reconstruction in the workflow of musculoskeletal modeling (joint kinematics, joint torques, muscle force and joint reaction force) in shoulder and upper-limb movements. Two participants performed functional (arm elevation and rotation), daily life (eating and reaching pants pockets) and sports movements (a simulated throwing maneuver)...
June 15, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28618310/bilateral-changes-in-3-d-scapular-kinematics-in-individuals-with-chronic-stroke
#9
Maíra Carolina Lixandrão, Paula Rezende Camargo, Caroline Evelin Neves Scarpa, Christiane Lanatovitz Prado-Medeiros, Tania Fátima Salvini
BACKGROUND: Stroke can lead to altered scapular motion that may limit the ability to perform activities of daily living. The aims were to evaluate scapular kinematics of individuals with chronic stroke and the correlation with paretic arm function. METHODS: Scapular kinematics was assessed in thirty-four individuals (Chronic stroke=17; controls=17) during arm elevation and lowering in scapular and self-selected planes, and during hair combing. The use of the paretic arm to perform activities of daily living was assessed by the Motor Activity Log (MAL-30)...
June 7, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28614274/corrective-osteotomy-for-symptomatic-clavicle-malunion-using-patient-specific-osteotomy-and-reduction-guides
#10
Mathias Haefeli, Matthias Schenkel, Ralf Schumacher, Karim Eid
Midshaft clavicular fractures are often treated nonoperatively with good reported clinical outcome in a majority of patients. However, malunion with shortening of the affected clavicle is not uncommon. Shortening of the clavicle has been shown to affect shoulder strength and kinematics with alteration of scapular position. Whereas the exact clinical impact of these factors is unknown, the deformity may lead to cosmetic and functional impairment as for example pain with weight-bearing on the shoulder girdle...
June 13, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28606637/three-dimensional-shoulder-motion-after-teres-major-or-latissimus-dorsi-tendon-transfer-for-posterosuperior-rotator-cuff-tears
#11
Jan Ferdinand Henseler, Arjen Kolk, Bob Zondag, Jochem Nagels, Jurriaan H de Groot, Rob G H H Nelissen
BACKGROUND: Teres major (TM) transfer and latissimus dorsi (LD) transfer are essential treatment options in patients with posterosuperior rotator cuff (RC) tears. The purpose of this study was to quantify shoulder kinematics before and after TM transfer and LD transfer in posterosuperior RC tear patients. METHODS: In this prospective cohort study, we quantitatively measured shoulder movements using an electromagnetic tracking device (Flock of Birds) preoperatively and 1 year after either TM (n = 13) or LD (n = 9) tendon transfer...
June 9, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28605288/neck-and-scapula-focused-exercise-training-on-patients-with-non-specific-neck-pain-a-randomized-controlled-trial
#12
Taha Ibrahim Yildiz, Elif Turgut, Irem Duzgun
OBJECTIVES: The purpose of this study was to investigate the effects of additional 6-week scapular stabilization training in patients with non-specific neck pain (NNP). MATERIALS AND METHOD: Thirty patients with non-specific neck pain were randomly allocated to the study. Fifteen participants in the intervention group (IG) received neck-focused exercise and scapular stabilization training while 15 participants in the control group(CG) received neck-focused exercise training...
June 12, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28595162/rotator-cuff-tendinopathy-alters-the-muscle-activity-onset-and-kinematics-of-scapula
#13
Hio Teng Leong, Gabriel Yin-Fat Ng, Shing Chung Chan, Siu Ngor Fu
Athletes with rotator cuff (RC) tendinopathy demonstrate an aberrant pattern of scapular motion which might relate to deficits in the scapular muscles. This study aimed to determine whether alteration in scapular kinematics is associated with deficits in the activity onset of scapular muscles. Forty-three male volleyball players (17 asymptomatic and 26 with RC tendinopathy) joined the study. Three-dimensional scapular kinematics was quantified using an acromial marker cluster method. The activity onset of the upper (UT), middle (MT), and lower trapezius (LT), and serratus anterior (SA) during arm abduction was assessed with electromyography...
August 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28554052/acute-effects-of-spinal-bracing-on-scapular-kinematics-in-adolescent-idiopathic-scoliosis
#14
Gozde Gur, Elif Turgut, Cigdem Ayhan, Gul Baltaci, Yavuz Yakut
BACKGROUND: Bracing is the most common nonsurgical treatment for adolescent idiopathic scoliosis. Spinal braces affect glenohumeral and scapulothoracic motion because they restrict trunk movements. However, the potential spinal-bracing effects on scapular kinematics are unknown. The present study aimed to investigate the acute effects of spinal bracing on scapular kinematics in adolescent idiopathic scoliosis. METHODS: Scapular kinematics, including scapular internal/external rotation, posterior/anterior tilting, and downward/upward rotation during scapular plane elevation, were evaluated in 27 in-brace and out-of-brace adolescent idiopathic scoliosis patients with a three-dimensional electromagnetic tracking system...
May 22, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28532884/the-role-of-scapular-kinematics-in-patients-with-different-shoulder-musculoskeletal-disorders-a-systematic-review-approach
#15
REVIEW
Roshanak Keshavarz, Siamak Bashardoust Tajali, Seyed Mohsen Mir, H Ashrafi
This study aimed to identify the role of the scapula in shoulder musculoskeletal disorders (SMDs) and provided a systematic review of available studies in the field of scapular three-dimensional kinematics. We systematically searched 5 international databases, including Scopus, EMBASE, PubMed, CINAHL, PEDro, and Cochrane Library from June to September 2015. Twenty studies met the inclusion criteria and were retrieved in full paper. The selected studies were critically appraised independently by two researchers...
April 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28478902/effects-of-short-malunion-of-the-clavicle-on-in-vivo-scapular-kinematics
#16
DooSup Kim, DongWoo Lee, YoungHwan Jang, JunSeop Yeom, Scott A Banks
BACKGROUND: Short malunion of the clavicle after fracture can change scapular kinematics and alter clinical outcome. However, the effects of malunion on kinematics and outcomes remains poorly understood because there have been no in vivo studies measuring changes during active motion with malunion. This study aimed to measure and to compare in vivo 3-dimensional (3D) scapular kinematics between normal shoulders and shoulders with short malunion using 3D-2-dimensional model image registration techniques...
May 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28420897/in-vivo-analysis-of-three-dimensional-dynamic-scapular-dyskinesis-in-scapular-or-clavicular-fractures
#17
Eugene Kim, Jai Hyung Park, Byeong-Ryong Han, Hee Jin Park, So Yeon Lee, Tsuyoshi Murase, Kazumi Sugamoto, Sumika Ikemoto, Se-Jin Park
The three-dimensional (3D) kinematics of the scapula were analyzed in vivo in 10 patients with scapular and 10 patients with clavicular fracture. Both the injured shoulder and normal contralateral shoulder were evaluated by computed tomography in the neutral and fully elevated positions. 3D rotational and translational movements of the scapula relative to the thorax during arm elevation were analyzed. A computer simulation program was used to compare rotational elevation/depression in the coronal plane, anterior/posterior tilting in the sagittal plane and protraction/retraction in the axial plane between the normal and affected sides...
April 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28416022/specific-or-general-exercise-strategy-for-subacromial-impingement-syndrome-does-it-matter-a-systematic-literature-review-and-meta-analysis
#18
REVIEW
Alison R Shire, Thor A B Stæhr, Jesper B Overby, Mathias Bastholm Dahl, Julie Sandell Jacobsen, David Høyrup Christiansen
BACKGROUND: Exercise is frequently suggested as a treatment option for patients presenting with symptoms of subacromial impingement syndrome. Some would argue implementing a specific exercise strategy with special focus on correction of kinematic deficits would be superior to general exercise strategy. There is however a lack of evidence comparing such exercise strategies to determine which is the most effective in the treatment of subacromial impingement syndrome. The aim of this review is to evaluate whether implementing specific exercise strategies involving resistive exercises are more effective than a general exercise strategy for the treatment of patients with subacromial impingement syndrome...
April 17, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28359696/partial-thickness-tears-involving-the-rotator-cable-lead-to-abnormal-glenohumeral-kinematics
#19
Gregory J Pinkowsky, Neal S ElAttrache, Alexander B Peterson, Masaki Akeda, Michelle H McGarry, Thay Q Lee
HYPOTHESIS: The objective of this study was to determine the biomechanical function of the rotator cable when a partial-thickness (>50%) tear is present. We compared intact specimens with partial tears of the anterior cable followed by partial anterior and posterior tears in regard to glenohumeral kinematics and translation. The hypothesis was that partial-thickness tears will lead to abnormal glenohumeral biomechanics, including glenohumeral translation and path of glenohumeral articulation...
July 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28347934/kinematic-analysis-of-the-shoulder-complex-after-anatomic-and-reverse-total-shoulder-arthroplasty-a-cross-sectional-study
#20
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
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