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Foot movement and tendon excursion: an in vitro study

B Hintermann1, B M Nigg, C Sommer

  • 1Human Performance Laboratory, University of Calgary, Canada.

Foot & Ankle International
|July 1, 1994
PubMed
Summary
This summary is machine-generated.

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This study quantified foot tendon movements and calculated moment arms for key foot muscles during eversion-inversion and flexion-extension. These findings offer insights into foot biomechanics and surgical applications.

Area of Science:

  • Biomechanics
  • Musculoskeletal System
  • Human Anatomy

Background:

  • Understanding foot and ankle biomechanics is crucial for diagnosing and treating various conditions.
  • Tendon excursions and moment arms are fundamental parameters in analyzing foot muscle function.

Purpose of the Study:

  • To determine tendon excursions during specific foot movements.
  • To calculate moment arms of foot muscles relative to the eversion-inversion and flexion-extension axes.

Main Methods:

  • In vitro investigation using 15 fresh foot-leg specimens.
  • A 6-degrees-of-freedom lower leg-holding device was employed.
  • Tendon excursions were measured across defined ranges of motion.

Main Results:

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  • Pronounced uniformity in tendon excursion was observed within individuals, despite inter-subject variation.
  • Specific average invertor moment arm values were derived for multiple foot muscles.
  • Moment arms varied with foot eversion and flexion angles, indicating dynamic changes in muscle leverage.

Conclusions:

  • The study provides quantitative data on foot tendon kinematics and muscle moment arms.
  • Results have potential implications for foot surgery, muscle function analysis, and understanding general foot function.
  • Moment arm characteristics are dependent on the foot's position in both eversion-inversion and flexion-extension planes.