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Measurement device for ankle joint kinematic and dynamic characterisation.
C Giacomozzi1, S Cesinaro, F Basile
1Biomedical Engineering Laboratory, Istituto Superiore di Sanità, Rome, Italy. claudia.giacomozzi@iss.it
Medical & Biological Engineering & Computing
|August 2, 2003
Summary
A new device measures ankle joint kinematics and isometric loading for biomedical research, prosthesis design, and rehabilitation. It assesses 3D foot movement and joint torques, enabling comprehensive lower leg function evaluation.
Area of Science:
- Biomechanics
- Biomedical Engineering
- Orthopedics
Background:
- Accurate characterization of ankle joint biomechanics is crucial for understanding lower limb function and developing effective interventions.
- Existing methods may lack the comprehensive capabilities to assess both kinematic and kinetic parameters under various conditions.
Purpose of the Study:
- To introduce and validate a novel measurement device for the kinematic characterization and isometric loading of ankle joints.
- To demonstrate the device's utility in non-invasive, in vivo experiments for diverse applications.
Main Methods:
- The device captures 3D foot motion relative to the shank and quantifies torques/moments around articular axes.
- It integrates with electromyography (EMG) and electrical stimulation for mechanical and myo-electrical assessment.
- Key features include high linearity, specific moment and angular ranges, and linear displacement capabilities.
Main Results:
- Operability, reliability, robustness, repeatability, and effectiveness were confirmed through tests on a healthy volunteer.
- Preliminary studies on 20 volunteers yielded results for internal-external rotation (80.8 ± 11.9°), pronation-supination (46.2 ± 9.1°), and flexion-extension (74.6 ± 13.1°).
- Normalized maximum plantar flexion moment was 57.5 ± 21.3 Nm, and maximum dorsiflexion moment was 50.2 ± 20.3 Nm.
Conclusions:
- The developed measurement device offers a versatile tool for in-depth analysis of ankle joint biomechanics.
- Its capabilities support advancements in basic research, prosthesis design, clinical diagnostics, sports medicine, and rehabilitation.
- The device provides a reliable platform for assessing lower leg mechanical and myo-electrical function.