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A closed-loop cadaveric foot and ankle loading model.

M L Hansen1, J C Otis, S M Kenneally

  • 1The Hospital for Special Surgery, 535 East 70th Street, NY 10021, USA.

Journal of Biomechanics
|March 27, 2001
PubMed
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This study introduces a new method for loading cadaver foot and ankle models, determining muscle forces experimentally. This approach provides more accurate Achilles and posterior tibialis forces compared to traditional estimation methods.

Area of Science:

  • Biomechanics
  • Orthopedics
  • Human Motion Analysis

Background:

  • Cadaver experiments are crucial for human foot and ankle biomechanics research.
  • Accurate force application is essential for valid biomechanical data.
  • Estimating extrinsic foot and ankle muscle forces is challenging.

Purpose of the Study:

  • To develop a novel loading model for cadaver foot and ankle biomechanics.
  • To determine Achilles and posterior tibialis muscle forces experimentally without predetermined values.
  • To investigate the model's performance during a specific gait cycle event.

Main Methods:

  • Developed a loading model using independent plantarflexion and inversion angle feedback control.
  • Specified input parameters: calcaneus position, ground reaction forces, and peroneus forces.

Related Experiment Videos

  • Simulated in vitro using closed-loop feedback control with human motion analysis data.

    • Main Results:

    • The novel model determined muscle forces experimentally.
    • Achilles and posterior tibialis forces were greater using position feedback control compared to traditional estimates.
    • Dependent parameters included joint motion and spring ligament strain.

    Conclusions:

    • The developed model offers a more accurate method for assessing foot and ankle muscle forces in biomechanical studies.
    • Experimental determination of muscle forces provides superior data compared to estimations based on physiological cross-sectional area and EMG.
    • This approach enhances the validity of cadaver experiments in foot and ankle biomechanics.