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Lateral Collateral Ligament
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Contents
Description
Lateral knee anatomy including the LCL[1]
Other Names
- Long external lateral ligament
- Fibular collateral ligament
Anatomic Description
- Origin: 1.4 mm proximal, 3.1 mm posterior to the lateral epicondyle of the femur[2]
- Proximal, posterior to origin of popliteus
- Insertion: 28.4 mm distal to the fibular styloid tip, attaches to 38% of the fibular head[3]
- Distal, anterior to popliteofibular ligament
- Course: LCL runs approximately 0.69 mm along the lateral portion of the knee
- Width 4-5 mm
- Thickness 2.6 mm
Actions
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[4]
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
Innervation
- Muscular branch of the Tibial Nerve
- Common Fibular Nerve
Clinical Significance
See Also
References
- ↑ 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
- ↑ 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
- ↑ Moorman CT III, LaPrade RF: Anatomy and biomechanics of the posterolateral corner of the knee. J Knee Surg 2005;18(2):137-145.15915835
- ↑ Song, Young‐Bin, et al. "The fibular collateral ligament of the knee: a detailed review." Clinical Anatomy 27.5 (2014): 789-797.