The objective of this chapter is to define further the clinical value of moment arms and provide a descriptive approach based on experimental investigation into the calculation of moment arm for the rotator cuff muscles spanning the glenohumeral joint during abduction. With the advent of imaging techniques quantifying the muscle torque capacity can be a reliable tool for clinical assessment of RC repairs as well as GH joint arthroplasty. Joint kinematics and muscle force estimation are essential for quantification of patient outcome and rehabilitation. Methods used in the calculation of moment arms usually referred to as the geometric approach and excursion method are directly related through principle of virtual work and moment equations where both require a center of rotation and a measureable distance to the line of action of the muscle force or simply the rate of change in the excursion of the muscle force length. In this chapter experimental data is provided for two muscles supraspinatus and subscapularis, respectively where a combination of a 3D model and digitized points along the tendons attachment and insertion surface area are used in the analysis. Moment arm is usually a measure used when the actual force is not known or difficult to measure but the force vector and center of the joint rotation are measurable. Since the torque is indicative of moment which is the product of the force and the distance from the center of rotation, so changes in moment arms provide an insight into the power capacity produced by individual muscles and ligaments after rotator cuff repairs and ACL reconstruction. This chapter shows how translation research from cadaveric testing to an actual clinical setting is feasible in the evaluation of the functional limitation of the shoulder joint movements during a prescribed therapeutic exercise. The results of this shoulder joint can be extended to other human joints where soft tissues repairs, joints arthroplasty and complex pathologies need further simulation to optimize the prosthesis design, and clinical procedures needed for specific patients.

Shoulder Muscles Moment Arm Contribution to Glenohumerol Joint Motion and Stability / Koh, Jason; Chiari, Lorenzo; Amirouche, Farid. - STAMPA. - (2021), pp. 15-24. [10.1007/978-3-030-81549-3_2]

Shoulder Muscles Moment Arm Contribution to Glenohumerol Joint Motion and Stability

Chiari, Lorenzo;
2021

Abstract

The objective of this chapter is to define further the clinical value of moment arms and provide a descriptive approach based on experimental investigation into the calculation of moment arm for the rotator cuff muscles spanning the glenohumeral joint during abduction. With the advent of imaging techniques quantifying the muscle torque capacity can be a reliable tool for clinical assessment of RC repairs as well as GH joint arthroplasty. Joint kinematics and muscle force estimation are essential for quantification of patient outcome and rehabilitation. Methods used in the calculation of moment arms usually referred to as the geometric approach and excursion method are directly related through principle of virtual work and moment equations where both require a center of rotation and a measureable distance to the line of action of the muscle force or simply the rate of change in the excursion of the muscle force length. In this chapter experimental data is provided for two muscles supraspinatus and subscapularis, respectively where a combination of a 3D model and digitized points along the tendons attachment and insertion surface area are used in the analysis. Moment arm is usually a measure used when the actual force is not known or difficult to measure but the force vector and center of the joint rotation are measurable. Since the torque is indicative of moment which is the product of the force and the distance from the center of rotation, so changes in moment arms provide an insight into the power capacity produced by individual muscles and ligaments after rotator cuff repairs and ACL reconstruction. This chapter shows how translation research from cadaveric testing to an actual clinical setting is feasible in the evaluation of the functional limitation of the shoulder joint movements during a prescribed therapeutic exercise. The results of this shoulder joint can be extended to other human joints where soft tissues repairs, joints arthroplasty and complex pathologies need further simulation to optimize the prosthesis design, and clinical procedures needed for specific patients.
2021
Orthopaedic Biomechanics in Sports Medicine
15
24
Shoulder Muscles Moment Arm Contribution to Glenohumerol Joint Motion and Stability / Koh, Jason; Chiari, Lorenzo; Amirouche, Farid. - STAMPA. - (2021), pp. 15-24. [10.1007/978-3-030-81549-3_2]
Koh, Jason; Chiari, Lorenzo; Amirouche, Farid
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/875069
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