Development of a dynamic index finger and thumb model to study impairment

Journal of Biomechanics
Alexander J BarryDerek G Kamper

Abstract

Modeling of the human hand provides insight for explaining deficits and planning treatment following injury. Creation of a dynamic model, however, is complicated by the actions of multi-articular tendons and their complex interactions with other soft tissues in the hand. This study explores the creation of a musculoskeletal model, including the thumb and index finger, to explore the effects of muscle activation deficits. The OpenSim model utilizes physiological axes of rotation at all joints, passive joint torques, and appropriate moment arms. The model was validated through comparison with kinematic and kinetic experimental data. Simulated fingertip forces resulting from modeled musculotendon loading largely fell within one standard deviation of experimental ranges for most index finger and thumb muscles, although agreement in the sagittal plane was generally better than for the coronal plane. Input of experimentally obtained electromyography data produced the expected simulated finger and thumb motion. Use of the model to predict the effects of activation deficits on pinch force production revealed that the intrinsic muscles, especially first dorsal interosseous (FDI) and adductor pollicis (ADP), had a substantial impact on t...Continue Reading

Citations

Jul 18, 2020·Computer Methods in Biomechanics and Biomedical Engineering·Barthélémy FaudotLaurent Vigouroux
Mar 19, 2020·Therapeutics and Clinical Risk Management·Wenquan DingJianghui Dong
Jan 28, 2021·Archives of Plastic Surgery·Dongkeun JunMyungchul Lee

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