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Related Experiment Videos

Mechanical contributions to chronic lateral ankle instability.

Tricia J Hubbard1, Jay Hertel

  • 1Department of Kinesiology, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, USA. thubbar1@uncc.edu

Sports Medicine (Auckland, N.Z.)
|March 11, 2006
PubMed
Summary

Chronic ankle instability (CAI) often follows lateral ankle sprains due to recurrence. Mechanical ankle instability (MAI), involving both hypermobility and hypomobility, may cause abnormal joint mechanics and persistent symptoms.

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Area of Science:

  • Orthopedics
  • Sports Medicine
  • Biomechanics

Background:

  • Lateral ankle sprains are common athletic injuries with high recurrence rates.
  • Chronic ankle instability (CAI) develops from repetitive sprains and persistent symptoms.
  • Mechanical ankle instability (MAI) is a suspected cause of CAI, leading to abnormal joint mechanics.

Purpose of the Study:

  • To explore the role of mechanical ankle instability (MAI) in chronic ankle instability (CAI).
  • To examine the contributions of both hypermobility and hypomobility to abnormal ankle mechanics.
  • To highlight the importance of assessing multiple ankle joints in CAI.

Main Methods:

  • Literature review examining the biomechanics of ankle instability.
  • Analysis of studies investigating hypermobility and hypomobility in the talocrural, subtalar, and inferior tibiofibular joints.

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  • Synthesis of findings related to joint axis of rotation and abnormal mechanics.

    • Main Results:

    • Both hypermobility (laxity) and hypomobility can alter joint mechanics and contribute to CAI.
    • Abnormal mechanics may involve the talocrural, subtalar, and inferior tibiofibular joints.
    • A potential relationship exists between hypermobility and hypomobility in the development of CAI.

    Conclusions:

    • Assessment and treatment of CAI should address both hypermobility and hypomobility.
    • Evaluation should extend beyond the talocrural joint to include the subtalar and inferior tibiofibular joints.
    • Understanding the interplay of joint mobility is crucial for managing chronic ankle instability effectively.