The arcuate popliteal ligament is an Y-shaped extracapsular ligament of the knee.[1][2]: 138 It is formed as a thickening of the posterior fibres of the joint capsule of the knee.[2]: 138 It reinforces the knee joint capsule inferolaterally.[3]
Anatomy
From its fibular attachment, the ligament extends superomedially over the tendon of the popliteus muscle, spreading out[3] superficial to the posterior aspect of the tendon.[3][2]: 134
The medial part of the ligament extends superficial to the tendon of popliteus muscle[2]: 138 to attach at the posterior part of the intercondylar area of tibia.[3][2]: 138
The lateral part forms a separate band that extends to the posterior part of[3] the lateral condyle of femur[3][2]: 138 alongside the tendon of popliteus muscle.[2]: 138
^ abcdefgPalastanga, Nigel; Soames, Roger (2012). Anatomy and Human Movement: Structure and Function. Physiotherapy Essentials (6th ed.). Edinburgh: Churchill Livingstone/Elsevier. p. 307. ISBN978-0-7020-3553-1.