06a: Knee and Popliteal Fossa Flashcards
List the key joints at the knee.
- Patellofemoral
2. Tibiofemoral
T/F: The fibula doesn’t articulate with the femur.
True
Patellofemoral pain/syndrome is commonly caused by:
Abnormal tracking of patella relative to patellar surface of femur
The load of the patella (is/isn’t) constant. Explain.
Isn’t; differs according to activity
In tibiofemoral joint, which part of (X) articulates with which part of (Y)?
X = femur Y = tibia
Medial/lateral femoral condyles articulate with medial/lateral tibial condyles
Tibiofemoral joint is what type of joint? List actions at the joint.
Modified hinge; F/E and some rotation
Articular surface of (X) (tibial/femoral) condyle is longer than (Y).
X = medial
Both tibial and femoral
Y = lateral condyle
T/F: The tibial condyles and intercondylar region are covered in hyaline cartilage.
False - not the intercondylar region
Passive rotation of tibiofemoral joint occurs during the (initial/final) (X) degrees of knee (flexion/extention).
Final;
X = 20-30
Extension
When is “locking”, aka (X), of the knee most evident?
X = passive rotation
During final 5 degrees of knee extension
With the foot fixed, passive rotation occurs via (medial/lateral) rotation of (X).
Medial;
X = femur
With the femur fixed, passive rotation occurs via (medial/lateral) rotation of (X).
Lateral;
X = tibia
(X) muscle assists in knee (flexion/extension) by “unlocking” knee.
X = popliteus
Flexion
Unlocking the knee via (X) muscle is done by (medial/lateral) rotation of (Y).
X = popliteus
- Medial rotation of tibia
- Lateral rotation of femur
Genu valgum is defined as (X) and results from (Y).
X = lateral angulation of leg in relation to thigh
Y = excessive loading of lateral tibiofemoral structures
Genu varum is defined as (X) and results from (Y).
X = medial angulation of leg in relation to thigh
Y = excessive loading of medial tibiofemoral structures
The menisci are (X)-shaped (Y) that function to:
X = crescent Y = fibrocartilagenous discs
- Deepen tibial articular surface
- Increase jt congruency/stability
- Shock absorption