Scalable musculoskeletal model for dynamic simulations of upper body movement

• Published in: Computer methods in biomechanics and biomedical engineering Vol. 27; no. 3; pp. 306 - 337
• Main Authors: Nasr, Ali, Hashemi, Arash, McPhee, John
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 01.03.2024; Taylor & Francis Ltd
• Subjects: Arm; Biomechanical engineering; Biomechanics; Body mass; Degrees of freedom; dynamic simulation; Exoskeleton; Exoskeletons; Human motion; Joints (anatomy); muscle torque; Musculoskeletal system model; Physical activity; Prostheses; Prosthetics; Simulation; Torque; Torso; upper body; upper body; biomechanics; dynamic simulation; Musculoskeletal system model; muscle torque
• ISSN: 1025-5842; 1476-8259; 1476-8259
• DOI: 10.1080/10255842.2023.2184747

A musculoskeletal (MSK) model is a valuable tool for assessing complex biomechanical problems, estimating joint torques during motion, optimizing motion in sports, and designing exoskeletons and prostheses. This study proposes an open-source upper body MSK model that supports biomechanical analysis of human motion. The MSK model of the upper body consists of 8 body segments (torso, head, left/right upper arm, left/right forearm, and left/right hand). The model has 20 degrees of freedom (DoFs) and 40 muscle torque generators (MTGs), which are constructed using experimental data. The model is adjustable for different anthropometric measurements and subject body characteristics: sex, age, body mass, height, dominant side, and physical activity. Joint limits are modeled using experimental dynamometer data within the proposed multi-DoF MTG model. The model equations are verified by simulating the joint range of motion (ROM) and torque; all simulation results have a good agreement with previously published research.