arcuate ligament

The arcuate ligament is part of the posterolateral ligamentous complex of the knee that is variably present, being found in ~65% (range 47.9-71%) of knees. It is a Y-shaped thickening of the posterolateral capsule, which arises from the fibular styloid and divides into two limbs:

• medial limb: curves over the popliteus muscle to join with the oblique popliteal ligament
• lateral limb: ascends to blend with the capsule near the lateral gastrocnemius muscle

In individuals with a large fabella, the arcuate ligament may be absent replaced by a thick fabellofibular ligament.

See also

• arcuate sign

Siehe auch:

• Fabella
• arcuate sign
• arcuate ligamentous complex of the knee