Muscle compensation strategies to maintain glenohumeral joint stability with increased rotator cuff tear severity: A simulation study

Khandare, Sujata; Arce, Richard; Vidt, Meghan E.

doi:10.1016/j.jelekin.2019.07.005

Cited by 17 publications

(20 citation statements)

References 52 publications

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“…In patients with resolving pain after a rotator cuff tear, a change in the activation and collaboration of the surrounding shoulder muscles to compensate for the insufficient rotator cuff is proposed [24,12]. Cadaveric studies mention increased strain on the deltoid muscle [6].…”

Section: Introductionmentioning

confidence: 99%

Compensatory Movement Patterns Are Based on Abnormal Activity of the Biceps Brachii and Posterior Deltoid Muscles in Patients with Symptomatic Rotator Cuff Tears

Veen

Koorevaar

Verdonschot

et al. 2020

Clin Orthop Relat Res

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Section: Introductionmentioning

confidence: 99%

Compensatory Movement Patterns Are Based on Abnormal Activity of the Biceps Brachii and Posterior Deltoid Muscles in Patients with Symptomatic Rotator Cuff Tears

Veen

Koorevaar

Verdonschot

et al. 2020

Clin Orthop Relat Res

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“…A previous modeling study of static arm postures showed that both magnitude and orientation of glenohumeral joint contact force remain relatively consistent with increased rotator cuff tear severity, suggesting that the system is prioritizing joint stability (Khandare et al, 2019). This work also reported that the magnitude and orientation of the joint contact force vector changed across postures, indicating that joint contact force may change during the performance of functional tasks (Khandare et al, 2019;Parsons et al, 2002). Such changes could exacerbate the rotator cuff tear or lead to the development of secondary effects, such as glenohumeral articular cartilage degeneration due to a reduction in subacromial space (Hsu et al, 2003).…”

Section: Introductionmentioning

confidence: 51%

“…Percentages shown indicate the scaled peak isometric force as a percentage of the no rotator cuff tear model for each muscle actuator (for example, IS75 indicates the infraspinatus muscle actuator is 25% reduction from the peak isometric force of the no rotator cuff tear model), with the corresponding magnitude of force indicated in parentheses. fossa to determine its orientation with respect to the glenoid center using a custom Matlab script (Khandare et al, 2019;Vidt et al, 2018). The mean results for the no rotator cuff tear model were computed for peak joint contact force magnitude and orientation.…”

Section: Tablementioning

confidence: 99%

“…The joint contact force represents the balanced force couple produced by muscles crossing the shoulder and its magnitude depends on the torques applied to the glenohumeral joint (Lippitt and Matsen, 1993;Warner et al, 1999). A previous modeling study of static arm postures showed that both magnitude and orientation of glenohumeral joint contact force remain relatively consistent with increased rotator cuff tear severity, suggesting that the system is prioritizing joint stability (Khandare et al, 2019). This work also reported that the magnitude and orientation of the joint contact force vector changed across postures, indicating that joint contact force may change during the performance of functional tasks (Khandare et al, 2019;Parsons et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Glenohumeral joint loading is impacted by rotator cuff tear severity during functional task performance

Pataky

Seelam

Engle

et al. 2021

Clinical Biomechanics

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“…The active and passive roles of the PSRC in shoulder kinematics are not yet fully understood. While the necessity of compensatory muscle forces to maintain arm motion in different rotator cuff tear conditions has been shown before in biomechanical studies and computer simulations, 7 , 19 the differentiation between active (contraction) and passive (spacing) effects of the PSRC on compensatory muscle forces is of interest when evaluating biomechanics of the aforementioned active and passive surgical procedures.…”

mentioning

confidence: 97%

Effect of Active and Passive Function of the Posterosuperior Rotator Cuff on Compensatory Muscle Loads in the Shoulder

Moroder

Chamberlain

Gabriel³

et al. 2022

Orthopaedic Journal of Sports Medicine

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Background: Irreparable posterosuperior rotator cuff (PSRC) tears have been shown to result in shoulder pain and loss of function. Purpose/Hypothesis: The purpose of this study was to determine the effect of the loss of active or passive function of the PSRC on compensatory muscle loads in the deltoid and the remaining rotator cuff. It was hypothesized that both deactivation and resection of the PSRC would result in load increases in the remaining muscles and that resection of the PSRC would result in even higher required compensatory forces than would mere deactivation. Study Design: Controlled laboratory study. Methods: A total of 7 cadaveric shoulders were tested using a biomechanical shoulder simulator with 10 independently controlled actuators for various muscles (anterior, middle, and posterior deltoid; inferior and superior subscapularis; latissimus dorsi; pectoralis major; teres minor; supraspinatus; and infraspinatus) and 3-dimensional motion tracking. The muscle loads representing the latissimus dorsi and pectoralis major were each held constant, and the remaining muscle actuator forces required to abduct the arm in the scapular plane were determined. The actuator forces corresponding with arm elevation from 20° to 65° were compared at 5° increments for 3 testing conditions: (1) intact, active PSRC; (2) intact, deactivated PSRC; and (3) resected PSRC and shoulder capsule. Results: In both the deactivated and resected states, the teres minor showed a significant increase in required muscle forces through nearly the entire tested range of arm elevation compared to the active state. This was also the case for the subscapularis but only at higher elevation angles. The deltoid demonstrated increased muscle forces of at least 1 of its subunits between 25° and 55° of elevation when comparing the deactivated state or resected state to the active state. However, through nearly the entire range of elevation, no statistically significant differences were found between the deactivated and resected states for any of the actuator loads representing muscle forces. Conclusion: The loss of active function of the PSRC led to compensatory loads on the remaining rotator cuff and deltoid, regardless of the passive presence of the PSRC as a supposed subacromial spacer. Clinical Relevance: The findings encourage the exploration of treatment procedures that mimic the active function of the PSRC when the rotator cuff itself is irreparable.

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Muscle compensation strategies to maintain glenohumeral joint stability with increased rotator cuff tear severity: A simulation study

Cited by 17 publications

References 52 publications

Compensatory Movement Patterns Are Based on Abnormal Activity of the Biceps Brachii and Posterior Deltoid Muscles in Patients with Symptomatic Rotator Cuff Tears

Compensatory Movement Patterns Are Based on Abnormal Activity of the Biceps Brachii and Posterior Deltoid Muscles in Patients with Symptomatic Rotator Cuff Tears

Glenohumeral joint loading is impacted by rotator cuff tear severity during functional task performance

Effect of Active and Passive Function of the Posterosuperior Rotator Cuff on Compensatory Muscle Loads in the Shoulder

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