Knee Anatomy

• - Tibiofemoral joint
• - Proximal Tibiofibular joint
• - Patellofemoral joint

The articulation between the femoral condyles and the tibial plateau.

The tibiofemoral joint gets support from the menisci, the cruciate ligaments, the joint capsule and collateral ligaments.

No! The motions available are: flexion/extension, internal/external rotation, and abduction/adduction

O: Posteromedial aspect of lateral femoral condyle

I: Just anteromedial to intercondylar eminence

A: Prevents anterior displacement of tibia on a fixed femur; prevents excessive rotation of tibia on a fixed femur; provides secondary support to varus and valgus forces

O: Lateral surface of medial femoral condyle

I: Posterior to the intercondylar eminence

A: Prevent posterior displacement of tibia on a fixed femur; prevents hyperextension of tibiofemoral joint; provides secondary restraint to varus and valgus forces.

*shorter, thicker, and stronger than ACL

A: Restricts valgus forces

Deep fibers attach to medial meniscus

O: Lateral femoral condyle

I: Head of fibula

A: Protects against varus forces

Articulates on posterior aspect of patella.

Extremely mobile

Terminal knee extension = terminal external rotation of the tibia

To initiate flexion, tibia must first internally rotate to "unscrew" the tibiofemoral joint via the popliteus muscle.