scholarly journals Muscle function in glenohumeral joint stability during lifting task

PLoS ONE ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. e0189406 ◽  
Author(s):  
Yoann Blache ◽  
Mickaël Begon ◽  
Benjamin Michaud ◽  
Landry Desmoulins ◽  
Paul Allard ◽  
...  
Keyword(s):  
Muscle Function ◽  
Glenohumeral Joint ◽  
Joint Stability ◽  
Lifting Task

Glenohumeral Translations are Only Partially Restored after Repair of a Simulated Type II Superior Labral Lesion

2003 ◽  
Vol 31 (1) ◽  
pp. 56-63 ◽  
Author(s):  
Andreas Burkart ◽  
Richard E. Debski ◽  
Volker Musahl ◽  
Patrick J. McMahon
Keyword(s):  
Clinical Relevance ◽  
Glenohumeral Joint ◽  
Surgical Techniques ◽  
Testing System ◽  
Type Ii ◽  
Joint Stability ◽  
Anterior Translation ◽  
Labral Lesion ◽  
Force Moment ◽  
Biceps Anchor

Background The effect on joint stability of repair of type II superior labrum and biceps anchor lesions is unknown. Hypothesis Increased translations of the glenohumeral joint after a simulated type II lesion will be reduced after the lesion is repaired. Study Design Controlled laboratory study. Methods A robotic/universal force-moment testing system was used to simulate load-and-shift and apprehension tests on eight cadaveric shoulders to determine joint kinematics of the shoulder after venting, creation of a type II lesion, and repair of the lesion. Results At 30° of abduction, anterior translation of the vented joint in response to an anterior load was 18.7 ± 8.5 mm and was significantly increased to 26.2 ± 6.5 mm after simulation of a type II lesion. Repair did not restore anterior translation (23.9 ± 8.6 mm) to that of the vented joint. The inferior translation that also occurred during application of an anterior load was 3.8 ± 4.0 mm in the vented joint and increased significantly to 8.5 ± 5.4 mm with a simulated type II lesion. After repair, the inferior translation decreased significantly to 6.7 ± 5.3 mm. Conclusions Repair of a type II lesion only partially restored glenohumeral translations to that of the vented joint. Clinical Relevance Surgical techniques including improved repair of passive stabilizers injured in the type II lesion should be considered.

Glenohumeral Joint Stability

1996 ◽  
Vol 330 ◽  
pp. 54-65 ◽  
Author(s):  
Leigh Ann Curl ◽  
Russel F. Warren
Keyword(s):  
Glenohumeral Joint ◽  
Joint Stability

Remplissage of an Off-track Hill-Sachs Lesion Is Necessary to Restore Biomechanical Glenohumeral Joint Stability in a Bipolar Bone Loss Model

2016 ◽  
Vol 32 (12) ◽  
pp. 2466-2476 ◽  
Author(s):  
Robert U. Hartzler ◽  
Christopher N.H. Bui ◽  
Woong K. Jeong ◽  
Masaki Akeda ◽  
Alex Peterson ◽  
...  
Keyword(s):  
Bone Loss ◽  
Glenohumeral Joint ◽  
Joint Stability ◽  
Loss Model

Effect of biceps rerouting technique to restore glenohumeral joint stability for large irreparable rotator cuff tears: a cadaveric biomechanical study

2020 ◽  
Vol 29 (7) ◽  
pp. 1425-1434 ◽  
Author(s):  
Sang-Yup Han ◽  
Thay Q. Lee ◽  
David J. Wright ◽  
Il-Jung Park ◽  
Maniglio Mauro ◽  
...  
Keyword(s):  
Rotator Cuff ◽  
Glenohumeral Joint ◽  
Biomechanical Study ◽  
Rotator Cuff Tears ◽  
Joint Stability

Effects of Simulated Injury on Tissue Deformation and Mechanical Properties of the Anteroinferior Glenohumeral Capsule

2008 ◽  
Author(s):  
Carrie A. Voycheck ◽  
Andrew J. Brown ◽  
Patrick J. McMahon ◽  
Richard E. Debski
Keyword(s):  
Mechanical Properties ◽  
Glenohumeral Joint ◽  
Permanent Deformation ◽  
Tensile Elongation ◽  
The Body ◽  
Joint Stability ◽  
Glenohumeral Ligament ◽  
Inferior Glenohumeral Ligament ◽  
Patients Experience ◽  
Repair Techniques

The glenohumeral joint is the most dislocated major joint in the body with most dislocations occurring anteriorly. [1] The anterior band of the inferior glenohumeral ligament (AB-IGHL) is the primary passive restraint to dislocation and experiences the highest strains during these events. [2,3] It has been found that injuries to the capsule following dislocation include permanent deformation, which increases joint mobility and contributes to recurrent instability. [4] Many current surgical repair techniques focus on plicating redundant tissue following injury. However, these techniques are inadequate as 12–25% of patients experience pain and instability afterwards and thus may not fully address all capsular tissue pathologies resulting from dislocation. [5] Therefore, the objective of this study was to determine the effect of permanent deformation on the mechanical properties of the AB-IGHL during a tensile elongation. Improved understanding of the capsular tissue pathologies resulting from dislocation may lead to new repair techniques that better restore joint stability and improve patient outcome by placating the capsule in specific locations.

Effect of Implant Shape and Material Properties on Stresses in the Glenoid Components of Total Shoulder Arthroplasties: A Finite Element Analysis

2010 ◽  
Author(s):  
Jingzhou Zhang ◽  
Charlie Yongpravat ◽  
Marc D. Dyrszka ◽  
William N. Levine ◽  
Thomas R. Gardner ◽  
...  
Keyword(s):  
Humeral Head ◽  
Glenohumeral Joint ◽  
Total Shoulder Arthroplasty ◽  
Peak Stress ◽  
Glenoid Component ◽  
Joint Stability ◽  
Element Analysis ◽  
Total Shoulder Arthroplasties ◽  
Shoulder Arthroplasties ◽  
Glenoid Loosening

The geometry of the glenohumeral joint is osseous, naturally nonconforming and minimally constrained, thus the essential requirement of a glenohumeral prosthesis in total shoulder arthroplasty (TSA) is prevention of joint degeneration and glenoid loosening. A variety of glenoid prostheses have been developed. Nonconforming glenohumeral implants are common for TSA. However, the nonconforming shape increases the instability when the humeral head is in the central region, where motion frequently occurs. Conforming implants can increase joint stability, but the “rocking-horse” effect [1] caused by the conforming shape is thought to lead to high stresses and moments at the glenoid rim when the humeral head approaches the periphery during its range of motion. The hybrid design, with a conforming center and a nonconforming periphery, combines the advantages of both nonconforming and conforming implant geometries. It has been shown [2] that the peak stress generated in glenoid components during activities of daily living can be as high as 25 MPa, which exceeds the polyethylene yield strength of the glenoid component and can lead to wear and cold flow of the component. Polyethylene has also been shown to be viscoelastic [3]. Therefore, both elastic-plastic and viscoelastic-plastic models of the glenoid implant were used to determine how viscoelasticity affected stress in the implant. The effects of implant shape on the stresses in the center, transition, and superior zones for the three different glenoid implant shapes, as well as on the stress in the underlying cement and bone, were determined in this study.

Effect of Expertise on Shoulder and Upper Limb Kinematics, Electromyography, and Estimated Muscle Forces During a Lifting Task

2020 ◽  
pp. 001872082096502
Author(s):  
Etienne Goubault ◽  
Romain Martinez ◽  
Najoua Assila ◽  
Élodie Monga-Dubreuil ◽  
Jennifer Dowling-Medley ◽  
...  
Keyword(s):  
Upper Limb ◽  
Glenohumeral Joint ◽  
Contact Forces ◽  
Muscle Forces ◽  
Shoulder Injuries ◽  
Effective Work ◽  
Limb Kinematics ◽  
Manual Handling ◽  
Shoulder Kinematics ◽  
Lifting Task

Objective To highlight the working strategies used by expert manual handlers compared with novice manual handlers, based on recordings of shoulder and upper limb kinematics, electromyography (EMG), and estimated muscle forces during a lifting task. Background Novice workers involved in assembly, manual handling, and personal assistance tasks are at a higher risk of upper limb musculoskeletal disorders (MSDs). However, few studies have investigated the effect of expertise on upper limb exposure during workplace tasks. Method Sixteen experts in manual handling and sixteen novices were equipped with 10 electromyographic electrodes to record shoulder muscle activity during a manual handling task consisting of lifting a box (8 or 12 kg), instrumented with three six-axis force sensors, from hip to eye level. Three-dimensional trunk and upper limb kinematics, hand-to-box contact forces, and EMG were recorded. Then, joint contributions, activation levels, and muscle forces were calculated and compared between groups. Results Sternoclavicular–acromioclavicular joint contributions were higher in experts at the beginning of the movement, and in novices at the end, whereas the opposite was observed for the glenohumeral joint. EMG activation levels were 37% higher for novices but predicted muscle forces were higher in experts. Conclusion This study highlights significant differences between experts and novices in shoulder kinematics, EMG, and muscle forces; hence, providing effective work guidelines to ensure the development of a safe handling strategy is important. Application Shoulder kinematics, EMG, and muscle forces could be used as ergonomic tools to identify inappropriate techniques that could increase the prevalence of shoulder injuries.

Inclination-dependent changes of the critical shoulder angle significantly influence superior glenohumeral joint stability

2016 ◽  
Vol 32 ◽  
pp. 268-273 ◽  
Author(s):  
B.K. Moor ◽  
R. Kuster ◽  
G. Osterhoff ◽  
D. Baumgartner ◽  
C.M.L. Werner ◽  
...  
Keyword(s):  
Glenohumeral Joint ◽  
Joint Stability ◽  
Critical Shoulder Angle ◽  
Shoulder Angle

scholarly journals Morphometry of the glenoid cavity and its correlation with selected geometric measurements of the scapula

2017 ◽  
Vol 16 (4) ◽  
pp. 572-579 ◽  
Author(s):  
Eric O Aigbogun ◽  
Gabriel S Oladipo ◽  
Mike O Oyakhiree ◽  
Chinagorom P Ibeachu
Keyword(s):  
Glenohumeral Joint ◽  
Medical Science ◽  
Predictor Variables ◽  
Maximum Height ◽  
Glenoid Cavity ◽  
Joint Stability ◽  
Significance Level ◽  
Standard Procedures ◽  
The Mean ◽  
Relationship Of

Introduction: An understanding of the normal glenoid cavity morphometry is important in corroborating the basis of luxation at the glenohumeral joint (GHJ). This study was carried out to determine the morphomertic relationship of the glenoid cavity to joint stability and device models to estimateglenoid cavity dimensions ofthe scapular boneof Nigerian origin in a post-mortem skeletal state using selected angles and dimensionMethods: A total of 200wellmacerated unpaired scapulaebone (96 right and 104 left) with complete ossification were used for this study. Geometric measurements were taken using standard procedures. SPSS (IBM® version 20) was used to analyze the data and the results of all measured parameters (for both sides and total) were presented. Correlation was determined from the summation of the bilateral measurement of; the superior (SSA), inferior (ISA) and medial (SVA) angles of the scapulae, maximum height of the scapula (MHS), and maximum glenoid height and width (MGH and MGW). Glenoid index (GI) was calculated by dividing MGW by MGH. Regression formulae for estimation the glenoid cavity parameters were derived. Significance level was set at 95% (P?0.05 was considered significant).Result: The mean GIwas calculated as 68.18±5.93% (with min. and max. ratio of 54% and 87%respectively). Of the predictor variables for estimating MGH and MGW, SSA was weakly (-) correlated (r<0.2; R2<0.1), MSH was averagely (+) correlated (r<0.55; R2<0.3), while a strong (+) correlation was observed between the interglenoid cavity dimensions (r=0.785; R2=0.617).Conclusion: Indices below 50% and above 89% are indications of possible GHJ problems.Using single measurements of various scapular parts to estimate the glenoid cavityis possible.Distortion of the morphometric relationship that exists between MGW and MGH is a clear pointer for glenohumeral luxation syndromes.Bangladesh Journal of Medical Science Vol.16(4) 2017 p.572-579

Sign in / Sign up

Export Citation Format

Share Document