Modulation of shoulder muscle and joint function using a powered upper-limb exoskeleton

Fong, Justin; Crocher, Vincent; Lee, Peter Vee Sin; Oetomo, Denny; Tan, Ying; Ackland, David C.

doi:10.1016/j.jbiomech.2018.02.019

Cited by 21 publications

(14 citation statements)

References 35 publications

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“…A previously published 5‐segment, 10‐degree‐of‐freedom (DOF) rigid‐body musculoskeletal model of a 92 kg male upper limb was developed in OpenSim and based on the Visible Human Male (VHM) anatomy (Fig. A) . The glenohumeral and acromioclavicular joints were modeled as 3‐DOF ball and socket joints, the sternoclavicular joint as a 2‐DOF universal joint, and the elbow joint as a 2‐DOF universal joint.…”

Section: Methodsmentioning

confidence: 99%

“…1A). [26][27][28][29] The glenohumeral and acromioclavicular joints were modeled as 3-DOF ball and socket joints, the sternoclavicular joint as a 2-DOF universal joint, and the elbow joint as a 2-DOF universal joint. The shoulder complex was actuated by 26 Hill-type muscle-tendon units representing the axioscapular (levator scapulae, superior trapezius, lower-middle trapezius, lower trapezius, rhomboid minor, superior rhomboid major, lower rhomboid major, superior serratus anterior, middle serratus anterior, lower serratus anterior, subclavius, pector-alis minor), axiohumeral (teres major, superior pectoralis major, middle pectoralis major, lower pectoralis major, latissimus dorsi) and scapulohumeral muscles (anterior deltoid, middle deltoid, posterior deltoid, supraspinatus, infraspinatus, subscapularis, teres minor, coracobrachialis).…”

Section: Rigid-body Musculoskeletal Modelingmentioning

confidence: 99%

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The influence of rotator cuff tears on muscle and joint‐contact loading after reverse total shoulder arthroplasty

Ackland

Robinson

Wilkosz

et al. 2018

Journal Orthopaedic Research

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Rotator cuff tears are known to affect clinical outcome of reverse total shoulder arthroplasty (RSA). This study aimed to use computational modelling to quantify the effect of rotator cuff tear severity on muscle and joint forces after RSA, as well as stresses at the glenosphere, base‐plate, fixation screws, scapula, and humeral components. A multi‐body musculoskeletal model of the glenohumeral joint was developed comprising the scapula, humerus and nine major upper limb muscles. Simulations of abduction and flexion after RSA were performed in the case of the intact rotator cuff and tears to (i) supraspinatus; (ii) supraspinatus and infraspinatus, and (iii) supraspinatus, infraspinatus and subscapularis. The intact and supraspinatus deficient rotator cuff resulted in the largest calculated muscle forces, glenohumeral joint contact forces and implant stresses. Peak glenohumeral joint forces during flexion were lower than those during abduction in all cases; however, substantially more posterior joint shear force was generated during flexion than abduction. A tear involving the supraspinatus and infraspinatus reduced glenohumeral joint forces by a factor of 8.7 during abduction (603.1 N) and 7.1 during flexion (520.7 N) compared to those in the supraspinatus deficient shoulder. RSA with an intact or supraspinatus deficient rotator cuff produces large glenohumeral joint forces that may increase base‐plate failure risk, particularly during flexion when posterior shear forces are largest. Infraspinatus tears after RSA greatly reduce glenohumeral joint compression and may ultimately reduce joint stability. Future research ought to focus on experimental validation of subject‐specific muscle recruitment strategies and joint loading after RSA. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res

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Section: Methodsmentioning

confidence: 99%

Section: Rigid-body Musculoskeletal Modelingmentioning

confidence: 99%

The influence of rotator cuff tears on muscle and joint‐contact loading after reverse total shoulder arthroplasty

Ackland

Robinson

Wilkosz

et al. 2018

Journal Orthopaedic Research

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“…Third, transverse plane muscle lines of action were not measured post‐operatively, but ought to be the focus of future research. Finally, muscle and joint loading calculations were not directly validated; however, each specimen‐specific musculoskeletal model was based on a previously published native shoulder model with muscle moment arms and lines of action previously measured and validated on upper limbs of similar age, muscle force‐length and force‐velocity profiles quantified using strength‐data from healthy adults, timing of muscle activation validated against measured electromyography, and joint force calculations validated against instrumented implant data …”

Section: Discussionmentioning

confidence: 99%

Muscle and Joint Function After Anatomic and Reverse Total Shoulder Arthroplasty Using a Modular Shoulder Prosthesis

Ackland

Thomas

Patel

et al. 2019

Journal Orthopaedic Research

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Changes in joint architecture and muscle loading resulting from total shoulder arthroplasty (TSA) and reverse total shoulder arthroplasty (RSA) are known to influence joint stability and prosthesis survivorship. This study aimed to measure changes in muscle moment arms, muscle lines of action, as well as muscle and joint loading following TSA and RSA using a metal-backed uncemented modular shoulder prosthesis. Eight cadaveric upper extremities were assessed using a customized testing rig. Abduction, flexion, and axial rotation muscle moment arms were quantified using the tendon-excursion method, and muscle line-of-force directions evaluated radiographically pre-operatively, and after TSA and revision RSA. Specimen-specific musculoskeletal models were used to estimate muscle and joint loading pre-and post-operatively. TSA lateralized the glenohumeral joint center by 4.3 ± 3.2 mm, resulting in small but significant increases in middle deltoid force (2.0%BW) and joint compression during flexion (2.1% BW) (p < 0.05). Revision RSA significantly increased the moment arms of the major abductors, flexors, adductors, and extensors, and reduced their peak forces (p < 0.05). The superior inclination of the deltoid significantly increased while the inferior inclination of the rotator cuff muscles decreased (p < 0.05). TSA using an uncemented metal-backed modular shoulder prosthesis effectively restores native joint function; however, lateralization of the glenoid component should be minimized intra-operatively to mitigate increased glenohumeral joint loading and polyethylene liner contact stresses. Revision RSA reduces muscle forces required during shoulder function but produces greater superior joint shear force and less joint compression. The findings may help to guide component selection and placement to mitigate joint instability after arthroplasty.

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“…Hence, studying daily activity monitoring and fall detection is critical to reducing health and nancial burdens [4]. In addition, daily activity recognition is bene cial to rehabilitation engineering [5].…”

Section: Introductionmentioning

confidence: 99%

Daily Activity Monitoring and Fall Detection Based on Surface Electromyography and Plantar Pressure

Jiang

Lü

et al. 2020

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Falls among the elderly comprise a major health problem. Daily activity monitoring and fall detection using wearable sensors provide an important healthcare system for elderly or frail individuals. We investigated the classification accuracy of daily activity and fall data based on surface electromyography (sEMG) and plantar pressure signals. sEMG and plantar pressure signals were collected, and their features were extracted. Suitable features were selected and combined for posture transition, gait, and fall using the Fisher class separability index. A feature-level fusion method, named as the global canonical correlation analysis of weighting genetic algorithm, was proposed to reduce dimensions. For the problem in which the number of daily activities is considerably more than the number of fall activities, Weighted Kernel Fisher Linear Discriminant Analysis (WKFDA) was proposed to classify gait and fall. Double Parameter Kernel Optimization based on Extreme Learning Machine (DPK-OMELM) was used to classify activities. Results showed that the classification accuracy of the posture transition is 100%, and the accuracy of gait and fall classified using WKFDA can reach 98%. For all types of posture transition, gait, and fall, sensitivity, specificity, and accuracy are over 96%.

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Modulation of shoulder muscle and joint function using a powered upper-limb exoskeleton

Cited by 21 publications

References 35 publications

The influence of rotator cuff tears on muscle and joint‐contact loading after reverse total shoulder arthroplasty

The influence of rotator cuff tears on muscle and joint‐contact loading after reverse total shoulder arthroplasty

Muscle and Joint Function After Anatomic and Reverse Total Shoulder Arthroplasty Using a Modular Shoulder Prosthesis

Daily Activity Monitoring and Fall Detection Based on Surface Electromyography and Plantar Pressure

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