We need you! See something you could improve? Make an edit and help improve WikSM for everyone.

Lateral Collateral Ligament

From WikiSM
Jump to: navigation, search


  • Origin: 1.4 mm proximal, 3.1 mm posterior to the lateral epicondyle of the femur[1]
  • Insertion: 28.4 mm distal to the fibular styloid tip, attaches to 38% of the fibular head[2]
  • Course: LCL runs approximately 0.69 mm along the lateral portion of the knee
  • Width 4-5 mm
  • Thickness 2.6 mm


  • Primary
    • 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
  • Secondary
    • 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


Clinical Significance

See Also


  1. 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
  2. Moorman CT III, LaPrade RF: Anatomy and biomechanics of the posterolateral corner of the knee. J Knee Surg 2005;18(2):137-145.15915835
Created by:
John Kiel on 1 December 2020 16:17:20
Last edited:
3 December 2020 07:49:06