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Updated: Feb 5, 2026
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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
Published on: September 17, 2021
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Analysis of grip and pinch strength using inverse dynamics simulation technique
Krishnakumar Sankar1, Shantanu Patil1, Sridhar Krishnamurthy2
11 Department of Translational Medicine and Research, SRM Medical College Hospital and Research Centre, SRM Institute of Science and Technology, Kattankulathur, India.
Summary
Grip strength and pinch strength vary with object size and shape. This study used OpenSim 3.3 musculoskeletal modeling to simulate finger joint moments during object manipulation, revealing how grip force changes.
Area of Science:
- Biomechanics
- Human Factors Engineering
- Musculoskeletal Modeling
Background:
- Grip strength is crucial for daily activities and is influenced by object characteristics.
- Understanding how finger joint forces change with object size and shape is essential for ergonomics and rehabilitation.
- Previous models often lack detailed finger joint articulation for grip analysis.
Purpose of the Study:
- To analyze the variation in grip and pinch strength exerted on objects of different sizes and shapes.
- To determine the joint moments generated by finger segments during gripping tasks.
- To investigate the influence of time on grip strength during object manipulation.
Main Methods:
- Utilized OpenSim 3.3, an open-source musculoskeletal modeling software, for dynamic simulations.
- Modified a generic wrist model to include custom joints in the proximal and distal phalanges of the fingers.
- Simulated gripping and pinching of various object sizes and shapes, analyzing resultant joint moments and forces.
Main Results:
- Quantified the joint moments exerted by finger segments during simulated grip and pinch tasks.
- Demonstrated that grip strength varies significantly with object size and shape.
- Established a method to determine grip and pinch strength by handling objects of different sizes and shapes over time.
Conclusions:
- The study successfully modeled finger joint dynamics during object manipulation.
- Findings provide insights into the biomechanics of grip strength related to object properties.
- The developed OpenSim model can be used for further research in hand function and ergonomics.
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