A musculoskeletal model of the hand and wrist capable of simulating functional tasks
DC McFarland, BI Binder-Markey… - IEEE transactions on …, 2022 - ieeexplore.ieee.org
IEEE transactions on biomedical engineering, 2022•ieeexplore.ieee.org
Objective: The purpose of this work was to develop an open-source musculoskeletal model
of the hand and wrist and to evaluate its performance during simulations of functional tasks.
Methods: The current model was developed by adapting and expanding upon existing
models. An optimal control theory framework that combines forward-dynamics simulations
with a simulated-annealing optimization was used to simulate maximum grip and pinch
force. Active and passive hand opening were simulated to evaluate coordinated kinematic …
of the hand and wrist and to evaluate its performance during simulations of functional tasks.
Methods: The current model was developed by adapting and expanding upon existing
models. An optimal control theory framework that combines forward-dynamics simulations
with a simulated-annealing optimization was used to simulate maximum grip and pinch
force. Active and passive hand opening were simulated to evaluate coordinated kinematic …
Objective
The purpose of this work was to develop an open-source musculoskeletal model of the hand and wrist and to evaluate its performance during simulations of functional tasks.
Methods
The current model was developed by adapting and expanding upon existing models. An optimal control theory framework that combines forward-dynamics simulations with a simulated-annealing optimization was used to simulate maximum grip and pinch force. Active and passive hand opening were simulated to evaluate coordinated kinematic hand movements.
Results
The model's maximum grip force production matched experimental measures of grip force, force distribution amongst the digits, and displayed sensitivity to wrist flexion. Simulated lateral pinch strength replicated in vivo palmar pinch strength data. Additionally, predicted activations for 7 of 8 muscles fell within variability of EMG data during palmar pinch. The active and passive hand opening simulations predicted reasonable activations and demonstrated passive motion mimicking tenodesis, respectively.
Conclusion
This work advances simulation capabilities of hand and wrist models and provides a foundation for future work to build upon.
Significance
This is the first open-source musculoskeletal model of the hand and wrist to be implemented during both functional kinetic and kinematic tasks. We provide a novel simulation framework to predict maximal grip and pinch force which can be used to evaluate how potential surgical and rehabilitation interventions influence these functional outcomes while requiring minimal experimental data.
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