Related Experiment Video
Updated: Jun 3, 2026
09:32
Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
A technical method using musculoskeletal model to analyse dynamic properties of muscles during human movement
Gang Tang1, Xi-An Zhang, Lin-Lin Zhang
1Logistics Engineering College, Shanghai Maritime University, China.
Computer Methods in Biomechanics and Biomedical Engineering
|March 11, 2011
Summary
This study introduces a novel musculoskeletal modeling method to accurately assess dynamic muscle properties in vivo. The validated approach precisely reproduces subject movement, offering a non-invasive alternative for biomechanical research.
Area of Science:
- Biomechanics
- Musculoskeletal modeling
- Human movement analysis
Background:
- Studying dynamic muscle properties in vivo often requires invasive methods.
- Accurate musculoskeletal models are crucial for non-invasive biomechanical research.
- Muscle moment arms are key indicators of dynamic muscle function.
Purpose of the Study:
- To develop and validate a joint coordinate system-based method for musculoskeletal modeling.
- To accurately reproduce subject movement on a musculoskeletal model.
- To calculate and compare muscle moment arms derived from the model with existing anatomical data.
Main Methods:
- A novel joint coordinate system-based method was developed.
- Coordinate transformations of muscle attachment points were performed between the model and the subject.
- Muscle moment arms for elbow flexion were calculated in 50 healthy subjects.
- Model-derived moment arms were compared with literature-based anatomical measurements.
Main Results:
- The developed musculoskeletal modeling method successfully reproduced subject movement.
- Calculated muscle moment arms for elbow flexion showed good agreement with anatomical studies.
- The trends in moment arm values between the model and anatomical data coincided.
Conclusions:
- The proposed joint coordinate system-based method is a valid and effective approach for in vivo musculoskeletal modeling.
- This non-invasive method provides accurate estimations of muscle dynamic properties.
- The findings support the use of this novel method in biomechanical and clinical research.
Related Concept Videos
01:20Excitation-Contraction Coupling in Skeletal Muscles
Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action potential...
When an action potential...
01:29Relaxation of Skeletal Muscles
The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open.