Posterolateral Rotatory Instability
Definition
Radius rotates externally in relation to the ulna
- posterior displacement of the radial head relative to the capitellum
- in flexion
Anatomy LCL
pivot shift test
Background
Anatomy
Developmental Anatomy
Knee joint first appears as a mesenchymal cleft at 8 weeks gestation
- ACL and PCL separate entities by week 10