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Estimation of ankle joint parameters in typically developed adults using functional calibration methods
Firooz Salami1, Sebastian I Wolf1, Jan Simon2
1Universitätsklinikum Heidelberg, Centre of Orthopedics and Trauma Surgery, Heidelberg, Germany.
Gait & Posture
|February 1, 2020
Summary
Accurate ankle joint parameters are crucial for gait analysis. This study found that functional calibration significantly shifts the ankle joint center anteriorly compared to traditional methods, impacting clinical outcomes.
Area of Science:
- Biomechanics
- Human Motion Analysis
- Orthopedics
Background:
- Conventional gait models often assume the ankle joint center is at the midpoint between malleoli.
- Non-invasive techniques for joint parameter determination exist but have limitations.
Purpose of the Study:
- To estimate ankle joint parameters using a functional approach.
- To investigate the accuracy of traditional ankle joint center assumptions.
Main Methods:
- Utilized data from 23 typically developed adults.
- Applied functional approaches to determine the functional joint center and axis.
- Collected data during two distinct calibration motions.
Main Results:
- Significant differences were observed in ankle joint parameters compared to the malleoli line.
- A prominent anterior shift of the ankle joint center (7% of foot length) was found using functional calibration.
- Both calibration motions revealed alterations in the ankle joint center and axis.
Conclusions:
- Accurate determination of ankle joint parameters is essential.
- Functional calibration provides a more precise estimation of the ankle joint center and axis.
- Altered ankle joint parameters can influence clinical outcomes in gait analysis.
