Posterolateral Ligamentous Complex
Description
Names
- Posterolateral Ligamentous Complex
- Arcuate Complex
- Arcuate Ligamentous Complex
General
- Important stabilizer of the posterolateral knee
- Not a discrete structure but bundle of structures
- Variability in publications/ definitions
- Anatomic variance also makes definition challenging
Generally Included Structures
- Lateral Collateral Ligament
- Arcuate Ligament
- Popliteofibular Ligament
- Posterior third of the lateral capsule
- Fabellofibular Ligament (when a fabella is present)
- Popliteus Musculotendinous Complex (not always included)
- Biceps Femoris Tendon (not always included)
- Popliteomeniscal Fascicles (not always included)
- Lateral Gastrocnemius Muscle
Functional Classification
- Static stabilizers
- Lateral Collateral Ligament (LCL)
- Popliteofibular Ligament (PFL)
- Popliteofemoral Ligament
- Posterolateral Capsule
- Arcuate Ligament
- Fabellofibular Ligament (when a fabella is present)
- Dynamic stabilizers
- Other Structures
- Popliteomeniscal Fascicles
- Posterior Horn Lateral Meniscus
- Lateral Coronary Ligament
Actions
- General
- Primary restraint to varus forces of the knee[3]
- Primary restraint to posterolateral rotation of the tibia
- In cruciate deficient knees[4]
- Play a great role as secondary stabilizers to anterior and posterior tibial translation
Vascular Supply
- Needs to be updated
Innervation
- Needs to be updated
Clinical Significance
See Also
References
- ↑ Case courtesy of Frank Gaillard, Radiopaedia.org, rID: 9330
- ↑ Crespo, Bernardo, et al. "Lesões do canto posterolateral do joelho: uma revisão completa da anatomia ao tratamento cirúrgico." Revista Brasileira de Ortopedia 50 (2015): 363-370.
- ↑ Chahla J, Moatshe G, Dean CS, LaPrade RF. Posterolateral corner of the knee: current concepts. Arch Bone Jt Surg. 2016;4:97–103
- ↑ Gollehon DL, Torzilli PA, Warren RF. The role of the posterolateral and cruciate ligaments in the stability of the human knee: a biomechanical study. J Bone Joint Surg Am. 1987;69:233–42.