Knee Anatomy Flashcards
Function of ACL
Function of PCL
Function of LCL
Function of MCL
Function of Transverse ligament
Role of meniscus
Is the medial or lateral meniscus more prone to injury?
Medial
Role of meniscus?
Meniscus increase stability for femorotibial articulation, distribute axial load, absorb shock, and provide lubrication and nutrition to the knee joint.
Movement on tibiofemoral joint?
Flexion, extension, medial rotation, lateral rotation
Normal knee flexion and extension
Flexion = 140 degrees, Extension = -5-10 degrees
Femur
- Open or closed chain
- Extension
- Flexion
- External rotation during…
- Internal rotation during….
extension rolls forward (anteriorly) and slide backwards (posteriorly); flexion rolls backwards (posteriorly) and slide forwards (anteriorly); internal rotation during squat flexion and external rotation for extension (standing).
Closed
Extension: rolls forward (anteriorly) and slides backwards (posteriorly)
Flexion: rolls backwards (posteriorly) and slide forwards (anteriorly)
External rotation for extension (standing)
Internal rotation during squat flexion
Tibia
- Open or closed chain
- Extension
- Flexion
- External rotation during ……
- Internal rotation during ……
Open chain
Extension: rolls and slides forward (anteriorly)
Flexion: rolls and slides backwards (posteriorly)
External rotation during extension
Internal rotation during flexion
At around ….. degrees of flexion, the patella engages with the femoral ……., which is the grooved part of the femur where the patella rests
20 degrees, trochlea
As flexion continues to 60 degrees, the patella moves ….. into the trochlear …..
Further, groove
When the knee is flexed at 90 degrees, the patella is ……. seated within the groove
Deeply