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Related Experiment Videos

Correlation between limb length discrepancy and asymmetrical rearfoot position

R L Blake1, H J Ferguson

  • 1Center for Sports Medicine, Saint Francis Memorial Hospital, San Francisco, CA.

Journal of the American Podiatric Medical Association
|November 1, 1993
PubMed
Summary

Limb length discrepancy affects calcaneal position during gait. The longer limb shows greater calcaneal eversion at midstance compared to the shorter limb.

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Area of Science:

  • Biomechanics
  • Gait Analysis
  • Orthopedics

Background:

  • Limb length discrepancy (LLD) is a common orthopedic condition.
  • LLD can alter biomechanics and potentially lead to secondary issues.
  • Understanding the effect of LLD on foot and ankle kinematics is crucial.

Purpose of the Study:

  • To investigate the impact of LLD on calcaneal position during the stance phase of gait.
  • To compare calcaneal-to-vertical angle between the longer and shorter limbs in individuals with LLD.
  • To establish normative data for calcaneal position in a control group.

Main Methods:

  • Utilized a two-dimensional Motion Analysis Foot Trak System to record gait.
  • Subjects included ten individuals with known LLD and ten controls.

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  • Measured the calcaneus-to-vertical angle throughout the stance gait cycle (heel contact to toe-off).

    • Main Results:

    • A significant difference in calcaneal position was observed at midstance between the short and long sides.
    • The longer limb exhibited greater calcaneal eversion (≥3 degrees) compared to the shorter limb.
    • No significant difference in calcaneal angle was found at heel contact between limbs or between sides in controls.

    Conclusions:

    • LLD significantly influences calcaneal eversion during the midstance phase of gait.
    • The longer limb demonstrates increased eversion, suggesting compensatory mechanisms.
    • These findings highlight the biomechanical adaptations occurring in response to LLD.