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Lateral Collateral Ligament

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(Redirected from Fibular collateral ligament)

Description

Lateral knee anatomy including the LCL[1]
Lateral view of a right knee illustrating the anterolateral corner structures. The dashed line shows where the anterolateral ligament and lateral capsule (ALL/LC) were sectioned deep to the superficial layer of the iliotibial band (ghosted). The ALL/LC was released from the anterior margin of the fibular collateral ligament (FCL) extending 7 cm anteromedial to the center of ALL tibial attachment. The ALL/LC was released as one unit. PFL, popliteofibular ligament; PLT, popliteus tendon. [2]

Other Names

  • Long external lateral ligament
  • Fibular collateral ligament
  • Lateral Collateral Ligament (LCL)

Anatomic Description

  • Origin: 1.4 mm proximal, 3.1 mm posterior to the lateral epicondyle of the femur[3]
  • Insertion: 28.4 mm distal to the fibular styloid tip, attaches to 38% of the fibular head[4]
  • Course: LCL runs approximately 0.69 mm along the lateral portion of the knee
  • Width 4-5 mm
  • Thickness 2.6 mm
  • Contributes to posterolateral corner

Primary Actions

  • Primary resistor of varus stress in all degrees of knee flexion
  • Significant role in providing posterolateral stability to the knee, resisting medial translation of the tibia
  • Primary resistor of external tibial rotation of the knee in 0-30° degrees of knee flexion[5]

Secondary Actions

  • Plays a minor role in stabilizing anterior and posterior tibial translation when the cruciate ligaments are torn

Vascular Supply

  • Popliteal Artery
    • Branches of the superior and inferior lateral genicular arteries
  • Anterior tibial recurrent arteries

Innervation

Clinical Significance

See Also

References

  1. ↑ LaPrade RF, Spiridonov SI, Coobs BR, Ruckert PR, Griffith CJ (2010) Fibular collateral ligament anatomical reconstructions: a prospective outcomes study. Am J Sports Med 38(10):2005–2011
  2. ↑ Vap, Alexander R., et al. "The role of the peripheral passive rotation stabilizers of the knee with intact collateral and cruciate ligaments: a biomechanical study." Orthopaedic journal of sports medicine 5.5 (2017): 2325967117708190.
  3. ↑ LaPrade RF, Ly TV, Wentorf FA, Engebretsen L. The posterolateral attachments of the knee: a qualitative and quantitative morphologic analysis of the fibular collateral ligament, popliteus tendon, popliteofibular ligament, and lateral gastrocnemius tendon. Am J Sports Med. 2003 Nov-Dec;31(6):854-60
  4. ↑ Moorman CT III, LaPrade RF: Anatomy and biomechanics of the posterolateral corner of the knee. J Knee Surg 2005;18(2):137-145.15915835
  5. ↑ Song, Young‐Bin, et al. "The fibular collateral ligament of the knee: a detailed review." Clinical Anatomy 27.5 (2014): 789-797.
Created by:
John Kiel on 1 December 2020 16:17:20
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Last edited:
26 February 2025 22:00:44
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