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Related Experiment Videos

Voluntary rotation in the human knee joint.

F K Fuss1

  • 1Institute of Anatomy (1st Department), University of Vienna, Austria.

Journal of Anatomy
|December 1, 1991
PubMed
Summary

Knee joint rotation is primarily restricted by capsular and collateral ligaments. The anterior cruciate ligament also limits medial rotation, while the posterior cruciate ligament has no rotational effect.

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Area of Science:

  • Orthopedic surgery
  • Biomechanics of the knee

Background:

  • Understanding knee joint stability is crucial for orthopedic procedures.
  • Knee rotation is a complex biomechanical motion influenced by multiple structures.

Purpose of the Study:

  • To identify specific anatomical structures that restrict knee joint rotation.
  • To elucidate the role of individual ligaments and menisci in controlling rotational stability.

Main Methods:

  • Sequential surgical removal of knee joint structures including menisci, anterior and posterior cruciate ligaments, and collateral ligaments.
  • Assessment of changes in medial and lateral rotation after each structural removal.

Main Results:

  • Capsular and collateral ligaments significantly restrict both medial and lateral knee rotation.
  • Anterior cruciate ligament acts synergistically to restrict medial rotation.
  • Posterior cruciate ligament does not influence knee rotation.
  • Medial rotation axis is through the intercondylar eminence's medial tubercle; lateral rotation axis is slightly lateral to it.

Conclusions:

  • Capsular and collateral ligaments are primary restraints to knee rotation.
  • Anterior cruciate ligament contributes to medial rotational stability.
  • Posterior cruciate ligament plays a minimal role in controlling knee rotation.

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