mechanism injury

Background

Size

2 x as strong as ACL

About the same length as ACL 38 mm

Cross sectional area 150% of ACL

13 mm diameter (thicker)

2 Bundles

1. Anterolateral

- most important

- double the size of the posteromedial

- tight in flexion

- try to reconstruct this bundle

Developmental Anatomy

Knee joint first appears as a mesenchymal cleft at 8 weeks gestation

- ACL and PCL separate entities by week 10